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1、BRITISH STANDARD OBSOLESCENT MAY 1986 BS 3410:1961 Specification for Metal washers For general engineering purposes UDC 621.882.4 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1961 This British Standard, having been approved by the
2、 Mechanical Engineering Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council on 1 September 1961 BSI 02-2000 The following BSI references relate to the work on this standard: Committee references MEE
3、/60 MEE/60/6 Draft for comment A(MEE)4400 ISBN 0 580 34594 7 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and indust
4、rial organizations: The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the Committee entrusted with the preparation of this standard: Admiralty*Gas Council Air MinistryHigh Commis
5、sion of India* Associated Offices Technical CommitteeInstitute of Marine Engineers Association of Consulting EngineersInstitute of Petroleum (Incorporated)Institution of Civil Engineers British Chemical Plant ManufacturersInstitution of Gas Engineers AssociationInstitution of Heating and Ventilating
6、 British Compressed Air SocietyEngineers British Electrical and Allied ManufacturersInstitution of Mechanical Engineers Association*Institution of Mechanical Engineers British Engineers Association*(Automobile Division) British Gear Manufacturers AssociationInstitution of Production Engineers* Briti
7、sh Internal Combustion EngineLocomotive and Allied Manufacturers Manufacturers Association*Association of Great Britain* British Iron and Steel Federation*Machine Tool Trades Association* British Railways, The British TransportMinistry of Labour (Factory Inspectorate) Commission*Ministry of Power Cr
8、own Agents for Oversea Governments andMinistry of Transport Administrations*Ministry of Works D.S.I.R. National Engineering LaboratoryNational Coal Board Electricity Council, The Generating Board andNational Physical Laboratory (D.S.I.R.)* the Area Boards in England and WalesRadio Industry Council*
9、Engineering Equipment Users Association*War Office* Agricultural Engineers AssociationLondon Transport Executive, The British Black Bolt large black washers; small light gauge black washers; round black washers with square holes for woodwork and timber; square black washers with round holes; steel o
10、r malleable cast iron square or D-shaped taper washers. General requirements for material and finish are also given. NOTEThe washers specified in this standard are not suitable for use with the fasteners covered by BS 3139, “High strength friction grip bolts for structural engineering” which include
11、s its own provision for washers. 7 Material a) Steel washers. i) Flat. Unless otherwise specified, flat washers shall be made from mild steel. ii) Taper. Taper washers shall be made from mild steel to BS 15, “Structural steel” with a tensile strength of 28/33 tons per sq in. b) Malleable cast iron t
12、ype. These shall be made from either i) Malleable cast iron (whiteheart) in accordance with BS 309, “Whiteheart malleable iron castings.” or ii) Malleable cast iron (blackheart) in accordance with BS 310, “Blackheart malleable iron castings.” 8 Finish The faces of the washers shall be reasonably fla
13、t, smooth and free from burrs. 9 Dimensions a) The dimensions of round black washers with round holes shall be in accordance with Table 7, Table 8 and Table 9. b) The dimensions of round black washers with square holes shall be in accordance with Table 10. c) The dimensions of square black washers w
14、ith round holes shall be in accordance with Table 11. d) The dimensions of square or D-shaped black taper washers shall be in accordance with Table 12. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1961 BSI 02-20009 Table 7 Ordinar
15、y black washers 1234 Nominal size of bolt Diameter of hole A Tolerance + 1/32 in Outside diameter B Thickness C Tolerance 1 gauge inininS.W.G.in 1/4 5/16 3/8 9/32 11/32 13/32 5/8 3/4 7/8 16 14 14 0.064 0.080 0.080 7/16 1/2 9/16 15/32 9/16 5/8 1 11/8 11/4 12 12 10 0.104 0.104 0.128 5/8 3/4 7/8 11/16
16、13/16 15/16 13/8 15/8 17/8 10 9 8 0.128 0.144 0.160 1 11/8 11/4 11/16 13/16 13/8 21/8 23/8 25/8 7 7 6 0.176 0.176 0.192 13/8 11/2 15/8 11/2 15/8 13/4 27/8 31/8 33/8 6 6 5 0.192 0.192 0.212 13/4 17/8 2 17/8 2 21/8 35/8 37/8 41/8 5 5 5 0.212 0.212 0.212 Licensed Copy: sheffieldun sheffieldun, na, Wed
17、Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1961 10 BSI 02-2000 Table 8 Large black washers 1234 Nominal size of bolt Diameter of hole A Tolerance + 1/32 in Outside diameter B Thickness C Tolerance 1 gauge inininS.W.G.in 1/4 5/16 3/8 9/32 11/32 13/32 3/4 7/8 1 12 12 12 0.104 0
18、.104 0.104 7/16 1/2 9/16 15/32 9/16 5/8 11/8 11/4 13/8 12 12 10 0.104 0.104 0.128 5/8 3/4 7/8 11/16 13/16 15/16 11/2 13/4 2 10 9 8 0.128 0.144 0.160 1 11/8 11/4 11/16 13/16 13/8 21/4 21/2 23/4 7 7 6 0.176 0.176 0.192 13/8 11/2 15/8 11/2 15/8 13/4 3 31/4 31/2 6 6 5 0.192 0.192 0.212 13/4 17/8 2 17/8
19、2 21/8 33/4 4 41/4 5 5 5 0.212 0.212 0.212 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1961 BSI 02-200011 Table 9 Small light gauge black washers 1234 Nominal size of bolt Diameter of hole A Tolerance + 1/32 in Outside diameter B
20、 Thickness C Tolerance 1 gauge inininS.W.G.in 1/4 5/16 3/8 9/32 11/32 13/32 9/16 5/8 3/4 16 16 16 0.064 0.064 0.064 7/16 1/2 9/16 15/32 17/32 19/32 7/8 1 11/8 16 16 14 0.064 0.064 0.080 5/8 3/4 7/8 21/32 25/32 29/32 11/4 11/2 15/8 14 14 14 0.080 0.080 0.080 1 11/8 11/4 11/32 15/32 19/32 17/8 21/8 23
21、/8 14 14 14 0.080 0.080 0.080 13/8 11/2 113/32 117/32 25/8 27/8 14 14 0.080 0.080 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1961 12 BSI 02-2000 Table 10 Round black washers with square holes for woodwork and timber construction
22、s 1234 Nominal size of bolt Width of hole A Tolerance + 1/32 in Outside diameter B Thickness C Tolerance 1 gauge inininS.W.G.in 3/8 1/2 5/8 7/16 9/16 11/16 11/4 11/2 2 11 10 9 0.116 0.128 0.144 3/4 7/8 1 13/16 15/16 11/16 21/4 25/8 3 8 5 5 0.160 0.212 0.212 Licensed Copy: sheffieldun sheffieldun, na
23、, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1961 BSI 02-200013 Table 11 Square black washers with round holes 1234 Nominal size of bolt Diameter of hole A Tolerance + 1/32 in Outside square B Thickness C Tolerance 1 gauge inininS.W.G.in 3/87/16 11/2 100.128 2 1/29/16 11/
24、2 100.128 2 5/811/16 2100.128 3 60.192 30.252 3/413/16 21/2100.128 360.192 3 30.252 4 7/815/16 21/2100.128 330.252 111/16 3 30.252 4 43/00.372 11/413/84 30.252 3/00.372 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1961 14 BSI 02-2
25、000 Table 12 Square or D-shaped taper washers 1234 Nominal size of bolt Diameter of hole A Overall size B Mean thickness C Tolerance + 1/32 in3 and 58 ininininin 3/8 1/2 5/8 7/16 9/16 11/16 1 11/4 11/2 3/16 3/16 3/16 1/4 1/4 1/4 3/4 7/8 1 13/16 15/16 11/16 13/4 2 21/4 3/16 3/16 3/16 1/4 1/4 1/4 * An
26、gle of taper may be 3, 5 or 8. Centre hole to be parallel to within 4. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:04:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3410:1
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