1、BRITISH STANDARD BS 3555:1988 Incorporating Amendment No. 1 Specification for Ring wrenchesBS3555:1988 This British Standard, having been prepared under the directionof the Machine, Engineers and Hand Tools Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffec
2、t on 30 November 1988 BSI 07-1999 First published October 1962 First revision November 1988 The following BSI references relate to the work on this standard: Committee reference MTE/15 Draft for comment 85/70589 DC ISBN 0 580 16430 6 Committees responsible for this British Standard The preparation o
3、f this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Committee (MTE/-). Technical Committee MTE/15, upon which the following bodies were represented: British Telecommunications plc Consumer Standards Advisory Committee of BSI Department of Trade and Industry (Mech
4、anical and Electrical Engineering Division) Federation of British Hand Tool Manufacturers Furniture, Timber and Allied Trades Union Institute of Carpenters Institution of Production Engineers Ministry of Defence National Coal Board The following body was also represented in the drafting of the stand
5、ard, through subcommittees and panels: Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No. Date of issue Comments 9023 April 1996 Indicated by a sideline in the marginBS3555:1988 BSI 07-1999 i Contents Page Committees responsible Inside front cover Forewor
6、d ii 1 Scope 1 2 Form and dimensions 1 3 Material 1 4 Hardness 1 5 Finish 1 6 Resistance to torque 1 7 Marking 1 Appendix A Torque test 6 Appendix B Guidance on the safe use of ring wrenches 6 Appendix C Information to be supplied by the purchaser 6 Figure 1 Forms and dimensions 2 Table 1 Details of
7、 ring wrenches for metric sizes 3 Table 2 Details of ring wrenches for unified sizes 4 Table 3 Details of ring wrenches for BS/Whitworth sizes 5 Publications referred to Inside back coverBS3555:1988 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Machine, E
8、ngineers and Hand Tools Standards Committee, and was first published in1962 under the title “Specification for ring spanners”. The1962 edition is withdrawn. In this revision the material and hardness requirements have been updated, and tables of dimensions are provided for metric series, unified ser
9、ies and BS/Whitworth series, all of which include a new provision for maximum offset depth. This revision takes account of a number of ISO standards as follows with one exception. In ISO1703 “Assembly tools for screw and nuts Nomenclature”, the BS term “ring wrench” is identified as “box wrench”. Th
10、is revision is related to ISO1085 “Assembly tools for screws and nuts Double-ended wrenches Size pairing”, ISO 3318 “Assembly tools for screws and nuts open-end double-head engineers wrenches, double-head box wrenches and combination wrenches Maximum width of heads”, ISO 691 “Wrench and socket openi
11、ngs Metric series Tolerances for general use”, and ISO1711 “Hand operated wrenches and sockets Technical specifications”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance wi
12、th a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had ame
13、ndments incorporated. This will be indicated in the amendment table on the inside front cover.BS3555:1988 BSI 07-1999 1 1 Scope This British Standard specifies dimensional, testing and other requirements for ring wrenches for metric, unified and British Standard hexagon bolts, nuts and machine screw
14、s specified in BS916, BS1083, BS1768, BS1769, BS1981, BS3139, BS3692, BS4183, BS4190, BS4395, ISO272, and for hexagonal headed bolts of various materials in the aerospace series. It covers hexagon and bi-hexagon double-ended ring wrenches in the following range: metric wrenches 3.2mm to 60mm (across
15、 flats); unified wrenches ! in to 2 in (across flats); BS wrenches, ! in to 1) in (thread diameter) and Whitworth (large) wrenches, 3 / 16in to 1! in (thread diameter). Appendix A describes a test for resistance to torque andAppendix B gives guidance on the safe use of ring wrenches. Appendix C list
16、s information to be supplied by the purchaser when ordering ring wrenches. The principal requirements of this standard also apply to single-ended ring wrenches except that the overall length of single-ended ring wrenches are subject to agreement between the purchaser and the supplier. NOTEThe titles
17、 of the publications referred to in this standard are listed on the inside back cover. 2 Form and dimensions The form and dimensions shall be as shown inFigure 1 and as given inTable 1, Table 2 andTable 3. Wrench lengths shall be calculated using the following formula: 10 W + 50mm 10% where NOTEThe
18、length tolerances given in the tables are generally acceptable. However closer tolerances may be required for compact stowage. Where this requirement applies, tighter tolerances on length may be agreed between the purchaser and the supplier. 3 Material The wrench shall be manufactured from alloy ste
19、el. 4 Hardness The hardness of the wrench head shall be between either: a) 39 HRC and 46 HRC inclusive (determined in accordance with BS891); or b) 382 HV and 456 HV inclusive (determined in accordance with BS427). 5 Finish All sharp edges shall be removed and wrenches shall be free from cracks, bur
20、rs and any other defects which may adversely affect the performance of the wrench or may, during proper use of the wrench, give rise to the risk of injury to the operator. Any protective finish shall, where applicable, be in accordance with the appropriate British Standard. 6 Resistance to torque Wh
21、en tested as described in Appendix A, each wrench shall show no permanent deformation or other damage which could influence usability. 7 Marking The wrenches shall be marked plainly and indelibly on the shank adjacent to the head as follows. a) Wrenches for metric sizes shall be marked with the metr
22、ic nominal dimension across the jaw, expressed in millimetres, e.g.19mm. b) Wrenches for unified inch sizes shall be marked with the nominal across flats size of the hexagon, followed by the sign A/F, e.g.7/16 A/F. c) Wrenches for British Standard and Whitworth large hexagon sizes shall be marked wi
23、th two marks, both being fractions. The first fraction shall represent the nominal diameter of a bolt having a head the dimensions of which are specified in either BS1083 or BS916, followed by the sign BS. The second fraction shall represent the nominal diameter of a bolt having a head the dimension
24、s of which correspond with those of the Whitworth large hexagon sizes, followed by the sign W, e.g.3/8 BS 5/16 W W is equal to the nominal width across flats of the larger end of the wrench.BS3555:1988 2 BSI 07-1999 Figure 1 Forms and dimensionsBS3555:1988 BSI 07-1999 3 Table 1 Details of ring wrenc
25、hes for metric sizes Nominal sizes across flats W Overall length L (see clause 2) Internal dimensions of ring across flats S External diameter of ring e Head thickness t Test torque Maximum offset depth d S 1 a S 2 a e 1 e 2 t 1 t 2 S 1 a S 2 a min. max. min. max. min. max. max. max. min. max. min.
26、max. max. mm mm mm mm mm mm mm mm mm mm mm mm mm Nm Nm mm 3.2 4 The length of these wrenches may vary up to a maximum of 143 mm 3.22 3.28 4.02 4.12 7 8 3 4 4 5 4 7 15 4 5 4.02 4.12 5.02 5.12 8 10 3 4 4 5 7 12 15 5 5.5 5.02 5.12 5.52 5.62 10 10.5 3 4 4 5 12 14 15 5.5 7 5.52 5.62 7.03 7.15 10.5 12.5 4
27、 5 4 6 14 25 15 6 7 6.03 6.15 7.03 7.15 11 12.5 4 6 4.5 7 18 25 21 7 8 117 143 7.03 7.15 8.03 8.15 12.5 14 4 6 4.5 7 25 35 21 8 9 126 154 8.03 8.15 9.03 9.15 14 15.5 4.5 7 5 8 35 45 21 8 10 135 165 8.03 8.15 10.04 10.19 14 17 4.5 7 5 9 35 58 23 10 11 144 176 10.04 10.19 11.04 11.19 17 18.5 5.5 9 6 1
28、0 58 73 25 10 13 162 198 10.04 10.19 13.04 13.24 17 21.5 5.5 9 7 11 58 107 25 11 13 162 198 11.04 11.19 13.04 13.24 18.5 21.5 6 10 7 11 73 107 25 12 13 162 198 12.04 12.24 13.04 13.24 20 21.5 6 10 7 11 89 107 25 12 14 b 171 209 12.04 12.24 14.04 14.27 20 23 6 10 8 12 89 128 26 13 17 192 242 13.04 13
29、.24 17.05 17.3 21.5 27 7 11 10 13 107 201 29 14 15 180 220 14.05 14.27 15.05 15.27 23 24 7 11 8 12 128 150 29 16 17 198 242 16.05 16.27 17.05 17.3 26 27 8 12 10 13 175 201 30 17 19 216 264 17.05 17.3 19.06 19.36 27 30 10 13 10 14 201 261 32 18 19 216 264 18.05 18.3 19.06 19.36 29 30 10 13 10 14 230
30、261 32 19 22 243 297 19.06 19.36 22.05 22.35 30 35 10 14 11 15 261 368 33 19 24 b 261 319 19.06 19.36 24.06 24.36 30 38 10 14 12 16 261 451 34 20 22 243 297 20.05 20.36 22.05 22.36 32 35 10 14 11 15 294 368 33 22 23 b 252 308 22.06 22.35 23.06 23.36 35 36 11 15 12 16 368 408 34 21 23 252 308 21.06 2
31、1.36 23.06 23.36 33 36 11 15 12 16 330 408 34 22 24 261 319 22.05 22.36 24.06 24.36 35 32 11 15 12 16 368 451 34 24 25 b 270 330 24.06 24.36 25.06 25.36 38 39 12 16 12 16 451 496 38 24 27 288 352 24.06 24.36 27.08 27.48 38 42 12 16 14 17 451 594 38 24 30 315 388 24.06 24.36 30.08 30.48 38 47 12 16 1
32、4 18 451 760 38 26 27 b 288 352 26.08 26.48 27.03 27.48 41 42 12 16 12 16 544 594 38 27 30 315 385 27.08 27.48 30.08 30.48 42 47 12 16 14 18 594 760 38 28 29 b 306 374 28.08 28.48 29.03 29.48 43 45 14 17 14 18 647 670 38 30 31 b 324 396 30.08 30.48 31.03 31.43 46 48 14 18 15 19 760 821 40 30 32 333
33、407 30.08 30.48 32.08 32.48 47 50 14 18 14 19 760 884 40 30 34 360 420 30.08 30.48 34.1 34.6 46 53 14 18 15 19 760 975 42 30 36 b 369 451 30.08 30.48 36.1 36.6 47 56 14 18 16 20 760 1165 42 32 34 360 420 32.08 32.48 34.1 34.6 50 53 15 19 15 19 884 975 42 32 35 360 440 32.08 32.48 35.1 35.6 50 55 15
34、19 16 20 884 1090 42 32 36 369 451 32.08 32.48 36.1 36.6 50 56 15 19 16 20 884 1165 42 36 41 414 506 36.1 36.6 41.1 41.6 56 63 16 20 18 22 1 165 1579 44 34 36 369 451 34.1 34.6 36.1 36.6 53 56 15 19 16 20 975 1 165 42 41 46 459 561 41.1 41.6 46.1 46.6 63 71 18 22 19 24 1 579 2 067 50 46 50 495 605 4
35、6.1 46.6 50.1 50.6 71 77 19 24 20 25 2 067 2 512 50 50 55 540 660 50.1 50.6 55.12 55.72 77 84 20 25 24 29 2 512 3 140 53 55 60 585 715 55.12 55.72 60.12 60.72 84 92 24 29 26 31 3 140 3 849 58 a S 1refers to small end and S 2to large end. b Size pairings not standardized by ISO (ISO1085 makes referen
36、ce).BS3555:1988 4 BSI 07-1999 Table 2 Details of ring wrenches for unified sizes Nominal sizes across flats W Overall length L Internal dimensions of ring across flats S External diameter of ring e Head thickness t Test torque Maximu m offset depth d S 1 a S 2 a e 1 e 2 t 1 t 2 S 1 a S 2 a min. max.
37、 min. max. min. max. max. max. min. max. min. max. max. in mm mm in in in in mm mm mm mm mm mm Nm Nm mm 1 / 4 5 / 16 120 146 0.251 0.256 0.314 0.319 11 14 4 6 4.5 7 17 21 5 / 16 3 / 8 133 162 0.314 0.319 0.376 0.381 14 16 4.5 7 5 8 17 42 21 3 / 8 7 / 16 149 181 0.376 0.381 0.439 0.445 16 18.5 5 8 6
38、10 42 73 25 7 / 16 1 / 2 162 197 0.439 0.445 0.502 0.509 18.5 21.5 6 10 7 11 73 115 25 1 / 2 9 / 16 178 216 0.502 0.509 0.564 0.573 20 23 6 10 8 12 115 170 26 9 / 16 5 / 8 190 231 0.564 0.573 0.627 0.636 23 26 8 12 8 12 170 226 29 5 / 8 11 / 16 206 251 0.627 0.636 0.689 0.699 26 27 8 12 10 13 226 26
39、0 29 5 / 8 3 / 4 219 269 0.627 0.636 0.752 0.764 26 30 8 12 10 14 226 305 30 11 / 16 3 / 4 219 269 0.689 0.699 0.752 0.764 27 30 10 13 10 14 260 305 30 3 / 4 7 / 8 243 305 0.752 0.764 0.877 0.889 30 35 10 14 11 15 305 373 33 13 / 16 7 / 8 243 305 0.815 0.827 0.877 0.889 32 35 10 14 11 15 339 373 33
40、13 / 16 15 / 16 b 264 321 0.815 0.827 0.940 0.952 32 38 10 14 12 16 339 463 34 7 / 8 15 / 16 264 321 0.877 0.889 0.940 0.952 35 38 11 15 12 16 373 463 34 7 / 8 1 1 / 16 b 292 356 0.877 0.889 1.066 1.081 35 42 11 15 12 16 373 610 38 15 / 16 1 276 340 0.940 0.952 1.002 1.014 38 39 12 16 12 16 463 554
41、34 15 / 16 1 1 / 8 308 375 0.940 0.952 1.128 1.144 38 46 12 16 14 18 534 667 38 1 1 / 16 1 1 / 8 308 375 1.066 1.081 1.128 1.144 42 45 12 16 14 18 610 667 38 1 1 / 16 1 1 / 4 337 410 1.066 1.081 1.253 1.269 42 50 12 16 15 19 610 819 40 1 1 / 8 1 1 / 4 b 337 410 1.128 1.144 1.253 1.269 45 50 14 18 15
42、 19 667 819 40 1 1 / 8 1 5 / 16 349 429 1.128 1.144 1.316 1.332 45 52 14 18 16 20 667 904 40 1 1 / 4 1 7 / 16 381 464 1.253 1.269 1.441 1.461 50 56 15 19 17 21 819 1 079 42 1 5 / 16 1 1 / 2 394 479 1.316 1.332 1.504 1.524 52 58 16 20 17 21 904 1 181 42 1 7 / 16 1 5 / 8 422 514 1.441 1.461 1.629 1.64
43、9 56 63 16 20 18 22 1 079 1 328 43 1 1 / 2 1 5 / 8 b 422 514 1.504 1.524 1.629 1.649 58 63 17 21 18 22 1 181 1 328 43 1 5 / 8 1 13 / 16 b 468 568 1.629 1.649 1.816 1.836 63 71 18 22 19 24 1 328 2 147 50 1 11 / 16 1 7 / 8 479 587 1.691 1.711 1.879 1.899 65 73 19 23 20 25 1 582 2 463 52 1 13 / 16 2 50
44、8 622 1.816 1.836 2.004 2.024 71 77 19 24 20 25 2 147 3 277 53 a S 1refers to small end and S 2to large end. b Size pairings not standardized by ISO (ISO 1085 makes reference).BS 3555:1988 BSI 07-1999 5 Table 3 Details of ring wrenches for BS/Whitworth (large) sizes Nominal thread diameter Overall l
45、ength L Internal dimensions of rings across flats S External diameter of rings e Head thickness t Test torque Maximum offset depth d BS Whitworth (large) S 1 a S 2 a e 1 e 2 t 1 t 2 S 1 a S 2 a min. max. min. max. min. max. max. max. min. max. min. max. max. in in mm mm in in in in mm mm mm mm mm mm
46、 Nm Nm mm 1 / 4 1 / 8 3 / 16 109 181 0.341 0.345 0.448 0.451 15.5 18.5 4.5 7 5 8 74 21 1 / 4 5 / 16 3 / 16 1 / 4 168 206 0.448 0.451 0.529 0.533 18.5 21.5 6 10 7 11 74 115 25 5 / 16 3 / 8 1 / 4 5 / 16 184 225 0.529 0.533 0.604 0.608 23 24 7 11 8 12 115 170 29 3 / 8 7 / 16 5 / 16 3 / 8 210 257 0.604
47、0.608 0.715 0.720 24 29 8 12 10 13 170 226 30 7 / 16 1 / 2 3 / 8 7 / 16 235 290 0.715 0.720 0.825 0.830 29 33 10 13 11 15 226 305 32 1 / 2 9 / 16 7 / 16 1 / 2 260 318 0.825 0.830 0.926 0.932 33 37 11 15 12 16 305 339 34 9 / 16 3 / 8 1 / 2 9 / 16 279 343 0.926 0.932 1.016 1.022 38 39 12 16 12 16 339
48、463 34 9 / 16 11 / 16 1 / 2 5 / 8 302 368 0.926 0.932 1.107 1.114 38 43 12 16 14 17 339 565 34 5 / 8 11 / 16 9 / 16 5 / 8 302 368 1.016 1.022 1.107 1.114 39 43 12 16 14 17 463 565 38 5 / 8 3 / 4 9 / 16 11 / 16 321 398 1.016 1.022 1.207 1.214 39 47 12 16 14 17 463 667 38 11 / 16 3 / 4 5 / 8 11 / 16 3
49、21 394 1.107 1.114 1.207 1.214 43 47 14 17 14 18 565 667 40 11 / 16 7 / 8 5 / 8 3 / 4 346 422 1.107 1.114 1.308 1.316 43 50 14 17 15 19 565 904 40 3 / 4 7 / 8 11 / 16 3 / 4 346 422 1.207 1.214 1.308 1.316 47 50 14 18 15 19 667 904 40 7 / 8 1 3 / 47 / 8 387 473 1.308 1.316 1.489 1.498 50 58 15 19 17 21 904 1 181 42 1 1 1 / 8 7 / 8 1 432 527 1.489 1.498 1.680 1.690 58 65 14 21 17 22 1 181 1 582 46
