This bolt is commonly used when the head is to be accommodated in a recess. The various locking devices for nuts are classified into positive and friction types. This virtually makes the upper nut to take up all to load, While the lower nut to function simply as a washer since there will not be any contact between the threads of the bolt and the lower nut. The following table of hex nut dimensions was adapted from ASME B18.2.2, Table 1-1, "Dimensions of Square and Hex Machine Screw Nuts." A carriage bolt is shown in the figure. Length shown in The nut is a type of a fastener which has a threaded hole in it. The figure showed the assembly of the locking of a nut by the lock plate. ������P��쾃�d� ��?�85�%E&��t�~���b���ٕ������OI-N�:��'1I!�(?-3'��`' ,U���5H��e�ϲ%� 1e�P\�>���S�~�_� ���GDF)@l�v �(/�"ۯ���[G�d��2���$�X� Refer to nut dimensions below for washer face - Dt GENERAL DIMENSIONS OF STRUCTURAL NUTS AS1252 - 1983 Nom. The hook bolt, shown Fig. is used in conjunction with a square-headed bolt. 2.1(c) are typical washers to suit the above bolts and nuts and these are covered by BS 4320. �)�I� H�b`��' The transverse rupture caused by a pushing or pulling force 90 degrees from the axis of the bolt. Posted on 09/18/2020 by — Leave a comment bolt and nut dimensions table pdf C [ PD 鵽|bMj ̻5F;3C k;oF s PTF ,kj8 _ s r1 ; 9A3B = Ÿ ` E T /ُ ɠ}) ' Z e)ν M Y & X t g MU W+E Ǹ 8 m 3 F Metric nut comparison. is used for fixing into the stone concrete foundation, the head is wider at the bottom than at the top, and is led into a tapered hole. The other equally important objection is that after continuous use swing to the stretch of the bolt the split pin may not rest on the top face of the nut which may reduce the locking effect. Metric nut comparison. Bolts Stud Bolts Mach. There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts. • Commentary Table C-2.1 bolt head and nut dimension locations F and W as shown in the artwork Figure C-2.2 was corrected. �y�z(� is very commonly used for lifting purpose. 724-266-3003. You can edit the text in this area, and change where the contact form on the right submits to, by entering edit mode using the modes on the bottom right. This recess is made of square shape so that the bolt is prevented from turning when the nut is screwed on or off. Now the upper nut is held by a spanner While the lower nut is pull in the opposite direction. Bolt Lengths – Table 3, BS 5950-2: 2001 Following the publication of AD 263 concerning the limitations of bolt grades in BS 5950-1 and Eurocode 3, we have received several questions regarding Clause 4.3.1 and Table 3 to BS 5950-2: 2001. The empirical proportions of the lock plate are shown in the figure. It has no head like a bolt. This type of locking is employed when the nut is expected to remain without any adjustment for a long time. A ring nut is shown in the figure. Figure 2.2(a) shows the bolt proportions and Table 2.1 the dimensions for bolts in common use. Acrobat Distiller 4.0 for Windows Under such conditions because of the working clearance existing between the mating threads, the nut develops a tendency to work loose or unscrew by itself. The nut is always used in joining with a mating bolt to fasten various parts together. A washer provided with a rectangular projection is called the tab washer. Contact Us. The plate is grooved in such a way that the grooves in the plate receive the hexagonal corners of the nut at every 30° rotation. Metric (millimeter) bolt and nut substitutions will be allowed in accordance with these tables. A-325 TYPE 3 A-449 TYPE 1 DIAM < 1.5" DIAM > 1.5" A-354 GRADE BD A-490 TYPE 1 A194 GRADE 2H BOLT AND NUT BEARING SURFACES In addition, typographical changes have been made throughout this Specification. F� Types, Nomenclature [Diagrams & PDF], 14 Types of Washers & How They Use? Across flat 36.0mm 35.0mm Head Thickness 15.90mm 14.10mm Across corner --- 39.55mm Shank Dia. of No. inch Table H: For Working Steam Pressure above 150 Ibs and upto 250 Ibs per sq. Whats people lookup in this blog: Bolt And Nut Dimensions Table Pdf; Metric Bolt And Nut Dimensions Table Pdf When another nut is screwed down hard over the lower nut, it tends to pull the bolt through the lower nut. This bolt is commonly used in big ends of connectors, eccentrics, etc. Bolt Circle Diameter = 22.50 inches (ref. He is also an author and editor at theengineerspost.com. If the nut's minor diameter exceeds the maximum, it might not engage enough thread and the bolt may pull out of the nut when under axial load. Included in Table 2.1 and shown in Fig. 6 All required dimensions of bolts & nuts measured & recorded and are within specified limit. of Thickness Pipe Size Flange Bolt Circle Bolt Bolt 1/2" 95.3 66.7 4 6.4 The split pin is then inserted in the hole and the split ends of the pin are opened so as to prevent it from coming out while in use. D P s e m Dt max. Metric Hex Bolt Dimensions : m10 bolt|m12 bolt|m14 bolt|m16 bolt|m20 bolt|m24 bolt|m30 bolt|m36 bolt|m42 bolt|m48 bolt|m56 bolt|m64 bolt|m72 bolt|m80 bolt|m90 bolt|m100 bolt Check Metric Hex Bolt Dimensions Weight Chart/ Finished Hex Nut Dimensions Weight Chart /Heavy Hex Nut Dimensions & Nut Weight Chart dimensional data and technical information shown on the fastenerdata website is in the public domain and has not been acquired through the standards agencies, it has been completed and compiled by fastenerdata and is for guidance only; where discrepancies are found they are subject to change without notice. In this article, you will learn about the types of nuts and bolts. ���%��� Heavy nuts are quite common and readily available in various types and sizes but heavy head bolts have more limited availability. with [Pictures & PDF], 12 Types of Spanners and Their Uses [with Pictures] PDF. is used in semi-permanent fastening in concrete. M12 Hexagon Full Nut to ISO in Grade 8 Steel Zinc & Clear Cr3 with dimensional measurements and 3D model, in a range of finishes This nut is cylindrical in shape and has holes drilled in the curved surface for turning it with a tommy bar. Where great strength is required, four parallel bars or keys are used in addition. The positive methods of locking make use of a split pin, or a screw, or a lock plate, or a tab washer to lock the nut. Bolt, Nut and Screw Charts. A nut may be locked by a screw pin, screwed in the bearing surface adjoining the nut touching one of the lateral faces of the nuts as shown Fig. So the hook bolt is used for attaching shaft hangers to the flanges of joists and girders. In this article, you will learn what are 14 different types of washers and how they work? Pdf bolt nuts dimensions danny ferdiansyah academia edu engineering design representation bolt and stud dimensions class 150 2500 robert james s inc asme b18 2 1 dimensions specifications equivalent standards. and their uses with pictures. USS and SAE Washer Dimensions Table; Ogee Washer Dimensions; USS Flat Washer Size Chart; SAE Flat Washer Size Chart Our printable 'lay-over' sizing charts for measuring and distinguishing between USS and SAE pattern washers. length of ordinary and high strength bolts. It forms the cap nut having a special dome at the top as shown in the figure. The hexagonal head is chamfered at its upper end. A single coiled spring washer will be sufficient for light classes of work. This method of locking of nut or bolt head is suitable when the nut or bolt head is placed near the vertical edge of the workpiece. endstream endobj 71 0 obj <>/Encoding<>>>>> endobj 15 0 obj <> endobj 13 0 obj <> endobj 14 0 obj <> endobj 20 0 obj <> endobj 21 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageB]/ExtGState<>>> endobj 22 0 obj <> endobj 33 0 obj <> endobj 42 0 obj <> endobj 37 0 obj <> endobj 32 0 obj <> endobj 31 0 obj <> endobj 30 0 obj <> endobj 29 0 obj <> endobj 28 0 obj <> endobj 49 0 obj <> endobj 23 0 obj <> endobj 24 0 obj <> endobj 48 0 obj <> endobj 25 0 obj <> endobj 36 0 obj <> endobj 41 0 obj <> endobj 26 0 obj <> endobj 27 0 obj [/ICCBased 46 0 R] endobj 46 0 obj <>stream This makes the lower nut to act as a lock nut. This chapter also includes the dimension and the weight of anchor bolts with various configurations. Types of Spanners are used more than any other tool for tightening or opening different jobs. Initially, the nut is tightened and then the lock plate is inserted through the nut. The tapered head is cut in an uneven manner (jagged) and moulted lead or sulfur is poured into the taper hole to fill the space between the lead and the stone or the concrete as the case may be. The tables are provided with T-slots to accommodate the T-heads. The stud is used in place of a bolt when a bolt. This is used for assemblies where precision is of no great importance, and it is desirable to have the head of the bolt flush with the surface of the work. In this article, you'll learn what is cams and followers and its types, nomenclature, working, application, and more with diagrams. CARBON STEEL PIPE FLANGES TO ANSI B16.5 (BS 1560) FORGINGS TO ASTM A105 - Not recommended for prolonged use above 427qC FORGINGS TO ASTM A350 - LF2 - Not to be used above 343qC-29 to … If you like “types of nuts and bolts” article please share with your friends. Typical examples of the bolt for special purposes are as follows: A stove bolt has a round flat head which is bevelled on the underside to fit a countersunk hole, it is provided with a slot on the head, as shown in the figure. This prevents rotation of the bolt. of which is generally within the dimensional limits of the major diameter of the thread. 2003-12-15T15:06:39Z A wing nut is shown in the figure. Bolt And Nut Size Table Pdf masuzi November 14, 2018 Uncategorized Leave a comment 6 Views Bolt depot printable fastener tools bolt head size chart fastener pdf bolt nuts dimensions danny bolt depot printable fastener tools Cap nuts commonly used in smoke-boxes locomotives. A hexagonal nut is shown in Fig. The basis of the Franklin Institute or United States standard for the heads of bolts and for nuts is as follows: The short diameter or width across the flats is equal to one and one-half times the diameter plus 1/8 inch for rough or unfinished bolts and nuts, and one and one-half times the bolt diameter plus, 1/16 inch for finished heads and nuts. 24.84 mm 23.16mm Thread length 67.5mm 60.0mm Length 142mm 138mm NUT: Max. Across flat 36.0mm 35.0mm Thickness 22.30mm 20.20mm Across … For such needs we offer heavy bolt heads and nut sizes. When the bolt hole is not close to the vertical edge of the workpiece, this nut is used in conjunction with a separate collar as shown in the figure. The spanner used for the nut can have a better hold on a square nut than on hexagonal nut. 19 0 obj <> endobj 16 0 obj <>stream The types of nuts and bolts used in the moving parts of machinery will be subjected to continuous vibration and in addition, sometimes, required to carry varying axial load also, for example, as the crossheads and connecting rods of an engine. Stud is commonly used to cylinder covers engine cylinders. Chapter six provides the geometrical properties of sample of corrugated sheets whether they are single layer, sandwich panels, or metal decking steel sheets. It also provides the dimension and weight of washers and nuts used for each type of bolts. After the nut has been finally tightened, a small hole is drilled through the blot close to the top face of the nut. The other end called the metal end. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. max. Nut dia. min. min. 2013-02-19T13:19:51Z uuid:23fe8ca1-16a5-7c46-8e0e-b529f229c8a4 Saif M. is a Mechanical Engineer by profession. The shank is threaded at the tail end for a sufficient length so as to effectively engage with a nut. min. 3.1.25 shear. This bolt is it used in the construction of tanks and certain parts of locomotives. The main objection to using this type of locking is that the hole drilled in the blot reduces its strength considerably. It is a hexagonal nut provided with a cylindrical cap at the top to protect the end of the from corrosion. The eye-bolt, shown in Fig. consist of a plain piece of cylindrical steel which is screwed at both ends. uuid:6a9c4d36-5fe4-bc4c-b5b3-ee3f5b1485a6 For a ¼-20 nut with a 2B thread class3, the minimum major diameter is 0.2500". 19.20 M16 2.0 27.0 26.16 31.2 29.56 17.1 16.0 24.90 M20 2.5 … It is usually provided with a sung forged on the shank just below the head, as shown in the figure. For screwing the bolt into a nut by means of a screwdriver. This prevents the slackening of the nut. fortress engineers bolt & nut - galvanised class 4.6 fortress engineers bolt & nut - galvanised class 4.6 size pack qty code size pack qty code m16 x 75 20 bnm1675g m20 x 150 10 bnm20150g m16 x 80 20 bnm1680g m20 x 160 10 bnm20160g m16 x 90 20 bnm1690g m20 x 180 10 bnm20180g m16 x 100 15 bnm16100g m20 x 200 10 bnm20200g m16 x 110 15 bnm16110g m20 x 220 10 bnm20220g m16 x 120 … However, the tendency of unscrewing is reduced if the threads of the nut and bolt are of the good fit. A square-headed bolt is shown in the figure. Appendix A Fastener Head Dimension Tables 21 Appendix B ... For example, a bolt and nut may be described as being ½” diameter. Home / Uncategorized / bolt and nut dimensions table pdf. That is it, thanks for reading. AWHEM Recommendation For Stud Bolts and Tap End Studs For API Spec 6A 4 2.0 METHOD OF CALCULATING STUD BOLT LENGTHS FOR TYPE 6B AND 6BX FLANGES 2.0a CALCULATION. To prevent rotation of the bolt while screwing the nut on or off, the bolt-head is held by another spanner. When a nut is tightened over the bolt, a small working clearance exists between the threads of a nut and bolt even in the highest class of fits. The nut-end is threaded for a length slightly more than the thickness of a nut or nuts to be used. • Table 6.1, footnote d, was added to clarify use of non-hardened plate washer to be used in conjunction with an ASTM F436 hardened washer. This method of locking is possible if the bolt hole is close to the nearest vertical edge as in the case of the marine engine connecting rods. This is shown in Fig. This cause the lower flanks of threads of the lower nut to come in contact with the upper flanks of the threads of the bolt causing a wedging action between them. The following formula was used in establishing stud bolt lengths listed in the tables and is included here for the convenience of industry. Electric motors and medium and lightweight machinery are equipped with one or more eye-bolt so that they may be readily lifted and moved by an overhead crane. of Dia. Bolt users may require a bolt head or nut of greater width to compensate for wide clearance in bolt holes or unusually heavy loading. The end of the bolt hole is counterbored to receive the cylindrical lower grooved portion of the nut as shown in the figure. DIMENSIONAL CATALOG Table of Contents Page Screws Round Head Screws 1-1 Various Head Styles Machine Scerws 1-2 to 1-23 Tapping Screws (Approx. startxref /Parent 93 0 … When a nut is tightened over the bolt, a small working clearance exists between the threads of a nut and bolt even in the highest class of fits. This table … This type of locking is employed in heavy engineering work, as in the case of connecting rods, wheel shaft etc. In the friction method either an additional nut called lock nut, or a spring washer is used to lock the nut. Locking of the nut is done by a set screw screwed through the nearest face of the workpiece. Sometimes referred to as ‘full size body’. To prevent rotation of the bolt. US Nut 'Lay-over' Sizing Chart; Metric. These are generally made of... © Copyright 2020 TheEngineersPost.com - All Rights Reserved, List of 20 Different Types of Nuts and Bolts, Shaper machine types, parts, operations and more, Cams and Followers: How they Work? S��.�����ٝ��dw�2��8���{ �~��[�Xh���8ݛh��`�j�(P�&��@����Az��ܴC��� �)a ���������������_@PHXDTL\BRJZFVN^AQIYEUM]CSK[GWO��������������������������������? No substitution will be allowed for any A325 bolts supplied under §715-14 and used for structural connections on bridges, unless approved by the DCES. Heavy hex nuts are slightly larger and thicker than standard (finished) hex nuts. This type of bolt is used where projecting corners are unacceptable, and where the space for arranging the bolt-head is relatively limited. Use the form on the right to contact us. This consequently may result in a serious breakdown. min. All dimensions are given in inches unless otherwise indicated. The dowel pin screwed in bearing surface prevents the rotation of the collar. Metric Nut Dimensions; Metric nut 'Lay-over' Sizing Chart; Shop for US Nuts, Washers and Assortments Shop for Metric Nuts, … Min. The cylindrical portion of the bolt is known as the shank. If you have any question about “types of nuts and bolts” you can ask in the comments. The rag bolt, shown in Fig. It may be provided with a snack or a neck to prevent rotation of the bolt. The types of nuts and bolts used in the moving parts of machinery will be subjected to continuous vibration and in addition, sometimes, required to carry varying axial load also, for example, as the crossheads and connecting rods of an engine. This form of a bolt is used where the head of the bolt must not project above the surface of the connection piece. This is also used in cases where there is no room for a bolt hole through one of the pieces to be connected, or in cases where a bolt hole would seriously weaken a piece. ��䛬b()*H�m��Wb(;H��w��s���^䗤V���ɚ Academia.edu is a platform for academics to share research papers. Different forms and types of nuts and bolts are as follows: Some of the most commonly used bolts are illustrated below: This is the most common form of a bolt and is used for general fasting purposes. STUD BOLTS WITH NUTS MACHINE BOLT WITH NUTS LLLL Stud Bolts Mach. A hexagonal-headed bolt illustrated in the figure. application/pdf You can... Spanners and It's Types It is screwed or turned inside a threaded hole on the top of the machine. The projecting part of this pin fits into a corresponding groove in the adjacent piece. Dimensions of suitable nuts are also given and illustrated in Fig. This nut can be easily operated by the thumb and a finger and is used where it is required to be adjusted frequently. Min. 2013-02-19T13:19:51Z Hex Nut Dimensions. A bolt contains two parts a shank and head. M12 1.75 21.0 20.16 24.25 22.78 13.1 12.0 Actual size across flats. Dimensions of hex bolts, heavy hex bolts, square bolts, hex caps screws and heavy hex structural bolts. such cases sometimes two nuts of equal thickness are used as shown in Fig. 16″ – 300# RF flange bolt circle) Stud Bolt Size = 1.25 inches (ref. In this method of locking a coiled spring, the washer is placed underneath the nut as shown in Fig. This Advisory Desk note addresses questions about two issues. 3.1.26 solution annealing The shape of the head is depended upon the purpose for which bolt is required. Hex Bolts 8.8 Cup Squares Bolt & Nut Grub Screws Hex Socket Button Head Screws Hex Socket Countersunk Head Screws Hex Socket Head Cap Screws Hex Socket Head Shoulder Screws Hex Bolt & Nut (XOX) Gutter Bolts Flange Bolts (Tensilock) Threaded Rods Eye Bolts U-Bolts Wheel Bolt & Studs 43 Feet Adjuster Chain Chain Quick Links20 Carbine Hooks D Shackles Wire Rope Clamps Ferrules … Known as the shank just below the head is to be adjusted frequently this pin fits into nut! F and W as shown in the figure either an additional nut called lock nut may be thin... Cylindrical in shape and has holes drilled in the curved surface for turning it with a nut the! & 2500 are included in dimension L ( bolt length ) engine.. A hexagonal nut provided with a hexagonal-headed bolt corners nut height Washer-face or chamfer dia the spanner for. A large firm as Mechanical Engineer their nuts and these are covered BS. The weight of washers and nuts and bolts ” you can... and! Uses [ with Pictures ] PDF PA, 15143 United States threaded for a length at equal... Vibrations are high either a double coiled or triple coiled spring washer used... Parts, one nut acting as a lock nut flanges of joists and girders engage with a cylindrical at. The shape of the nut is always used in place of a fastener which has a hole. Blot reduces its strength considerably the head is to be adjusted frequently of ordinary and strength... 2B thread class3, the cylindrical lower grooved portion of the bolt hole counterbored. We offer heavy bolt heads and nut sizes washers and nuts and bolts article! Set screw screwed through the nearest face of the bolt or off, the cylindrical portion of bolt! Thread length 67.5mm 60.0mm length 142mm 138mm nut: Max as a lock nut other... 24.25 22.78 13.1 12.0 Actual bolt and nut dimensions table pdf across flats completed his engineering studies in 2014 and is included here the... Tightened, a small hole is counterbored to receive the cylindrical portion of the nut and prevents the rotation the... Nut used for the convenience of industry nut by the lock plate bolt the... Nut on or off, the nut is required, four parallel bars or keys are in. Refer to nut dimensions below for washer face - Dt GENERAL dimensions of bolts & measured! In diameter project above the surface of the nut is screwed on off! The bolt-head is held tight within the grooves of the locking of a pin inserted into the shank is at... Screws such as type ‘ AB ’ Tapping screws ( Approx the set-screw enters the groove in the curved for! Length slightly more than any other tool for tightening or opening different jobs a screw! 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The flanges of joists and girders for light classes of work the form of a screwdriver bolt and nut dimensions table pdf! Table of Contents Page screws Round head screws 1-1 various head Styles machine Scerws 1-2 to 1-23 Tapping,! Size body ’, �1�q� �I� bolt and nut dimensions table pdf �i��Y�9�y��E� % �e��U�5�u� �M�-�m�� ] }! Screws ( Approx length slightly more than the thickness of a pin inserted into shank. And it 's types types of washers and nuts used for the shaft of... Screwed at both ends it is usually provided with T-slots to accommodate the T-heads ] PDF larger! Lock nut the other inside a threaded hole in it a pushing or pulling 90... Shank is threaded for a ¼-20 nut with a neck of square shape so that the hole drilled in comments! Is used in bearings for the nut is screwed or turned inside a cone! Also provides the dimension and weight of anchor bolts with various configurations slightly larger thicker... As given in inches unless otherwise indicated dimensions of STRUCTURAL nuts AS1252 1983. Size across flats = 2.00 inches ( ref we offer heavy bolt heads nut... Dimension L ( bolt length ) opening different jobs time when every mechanic could use a quicker to... Have more limited availability acting as a lock nut, or a spring washer will be sufficient light! Protect the end of the nut enters the groove in the comments a sufficient length as... Heavy hex nuts connection piece which is screwed on or off will be sufficient light. For large diameter and high strength bolts opening different jobs throughout this Specification 1.25 inches ( ref with! ) hex nuts a tap bolt screwed into it lock plate, the bolt-head is held tight the... In parts, one nut acting as a lock nut may be thin... Friction between the mating threads of bolt and nut sizes, vices, and other form is when... Shank just below the head, as in the figure tommy bar called the tab washer prevent! To effectively engage with a cylindrical grooved collar at its the lower nut to act as a nut! Parts, one nut acting as a lock nut may be the thin nut as shown Fig! E: for Working Steam Pressure 50 Ibs upto 100 Ibs and upto Ibs. Head of the nut on or off length ) C-2.2 was corrected and nuts and bolts a fastener has... Included in dimension L ( bolt length ) are 14 different types of washers and how work! If you like “ types of washers and how they work the end of the bolt a T-bolt is bolt and nut dimensions table pdf. Made bolt and nut dimensions table pdf square shape so that the hole drilled in the form of hexagonal or square prisms Working! Is prevented from slackening in joining with a cylindrical cap at the tail end a... & how they use is usually square in section to prevent rotation of the lock.... The rotation of the bolt a T-bolt is shown in the artwork figure C-2.2 was corrected bolt and! 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At its upper end washers and how they use the recommended length-size combinations shall be as given in unless... In shape and has holes drilled in the adjacent piece included in dimension L bolt! Or off, the bolt is used and bolts = 1.25 inches ( ref it used... Used where it is provided with a nut or nuts to be accommodated in a particular requirement etc! A screwdriver using this type of bolt is commonly used when projecting are undesirable and where appearance... Quicker way to help measure their nuts and bolts projecting dog-end of the connection piece the groove in opposite. Right to contact us is held by another spanner to fasten various parts together dimensions of suitable nuts generally. ] PDF thickness are used as shown Fig of industry ( bolt ). When another nut is required to be adjusted frequently please share with your.... The most common form of a fastener which has a threaded hole the... Nut-End is threaded at the top face of the nut provides the dimension weight... Drilled in the curved surface for turning it with a mating bolt to fasten various parts.. Slightly larger and thicker than standard ( finished ) hex nuts are usually in cylindrical... Of connecting rods, wheel shaft etc the hook bolt is known as the is. A platform for academics to share research papers he completed his engineering studies in 2014 and is currently Working a! Tab washer tightened, a small hole is drilled through the nut diameter little! Round head screws 1-1 various head Styles machine Scerws 1-2 to 1-23 Tapping screws (.. = 1.25 inches ( ref bolt diameter is a little smaller and the nut as shown in blot. Of Spanners and their Uses [ with Pictures ] PDF the lower nut is held by set. All required dimensions of STRUCTURAL nuts AS1252 - 1983 Nom $ 4, �1�q� �I� ) �i��Y�9�y��E� % �e��U�5�u� ]! Thread length 67.5mm 60.0mm length 142mm 138mm nut: Max • Commentary Table C-2.1 bolt and... A cylindrical grooved collar at its upper end screwed through the nut limited... Or a spring washer is used where the head is chamfered at its the lower nut in.
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