1、BRITISH STANDARD BS 4006:1992 Incorporating Amendment Nos. 1 and2 Specification for Hand operated square drive socket wrenches and accessoriesBS4006:1992 This British Standard, having been prepared under the directionof the Machine, Engineers and Hand Tools Standards Policy Committee, waspublished u
2、nder the authorityof the Standards Boardand comes into effect on 15October 1992 BSI 07-1999 First published as BS 4006-1 April1966 and Supplement No. 1, June 1968 Second edition March 1987 Third edition October 1992 The following BSI references relate to the work on this standard: Committee referenc
3、e MTE/15 Draft for comment 90/73756 DC ISBN 0 580 20879 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/15, upon which the following bodies
4、 were represented: British Coal Corporation British Telecommunications plc Consumer Policy Committee of BSI Federation of British Engineers Tool Manufacturers Federation of British Hand Tool Manufacturers Handle Manufacturers Association Institute of Carpenters Institute of Trading Standards Adminis
5、tration Ministry of Defence Amendments issued since publication Amd. No. Date Comments 8314 November 1994 8555 May 1995 Indicated by a sideline in the marginBS4006:1992 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword iv 1 Scope 1 2 Normative references 1 3 Definitions
6、1 4 Materials 2 5 Hardness 2 6 Design and manufacture 2 7 Finish 3 8 Dimensions and tolerances 3 9 Torque 3 10 Gauging 4 11 Designation and marking 4 Annex A (normative) Torque test 5 Annex B (informative) Guidance on the safe usage of sockets and accessories 5 Figure 1 External square drive plug en
7、ds 6 Figure 2 Internal square drive socket ends 6 Figure 3 Metric sockets with6.3mm (! in) square drives 7 Figure 4 Unified sockets with6.3mm (! in) square drives 8 Figure 5 BSF, BSW and Whitworth sockets with6.3mm (! in) square drives 9 Figure 6 BA sockets with6.3mm (! in) square drives 10 Figure 7
8、 Metric sockets with10mm () in) square drives 10 Figure 8 Unified sockets with10mm () in) square drives 11 Figure 9 BSF, BSW and Whitworth sockets with10mm () in) square drives 12 Figure 10 Long metric sockets with10mm () in) square drives 13 Figure 11 Long unified sockets with10mm () in) square dri
9、ves 14 Figure 12 Metric sockets with12.5mm (“ in) square drives 15 Figure 13 Unified sockets with12.5mm (“ in) square drives 16 Figure 14 BSF, BSW and Whitworth sockets with12.5mm (“ in) squaredrives 17 Figure 15 Long metric sockets with12.5mm (“ in) square drives 18 Figure 16 Long unified sockets w
10、ith12.5mm (“ in) square drives 19 Figure 17 Long BSF, BSW and Whitworth sockets with12.5mm (“ in) square drives 20 Figure 18 Bi-square sockets with12.5mm (“ in) square drives for normalinchseries 21 Figure 19 Metric sockets with20mm (# in) square drives 22 Figure 20 Unified sockets with20mm (# in) s
11、quare drives 23 Figure 21 BSF, BSW and Whitworth sockets with20mm (# in) square drives 24 Figure 22 Metric sockets with25mm (1 in) square drives 25 Figure 23 Unified sockets with25mm (1 in) square drives 26 Figure 24 BSF, BSW and Whitworth sockets with25mm (1 in) square drives 27 Figure 25 “T” handl
12、e square drives 28 Figure 26 Swivel handle nut spinners 29 Figure 27 Extensions 29 Figure 28 Flexible extensions 29BS4006:1992 ii BSI 07-1999 Page Figure 29 Universal joints 30 Figure 30 Speed braces 30 Figure 31 Ratchet handles 31 Figure 32 Spinner handles 32 Figure 33 Ratchet unit adaptors 33 Figu
13、re 34 Solid convertors 33 Table 1 Minimum detachment forces for nominal size of drive 2 Table 2 Dimensions of external square drive plug ends 6 Table 3 Dimensions of internal square drive socket ends 7 Table 4 Dimensions of metric sockets with6.3mm (! in) square drives 8 Table 5 Dimensions of unifie
14、d sockets with6.3mm (! in) square drives 9 Table 6 Dimensions of BSF, BSW and Whitworth sockets with6.3mm (! in)square drives 9 Table 7 Dimensions of BA sockets with6.3mm (! in) square drives 10 Table 8 Dimensions of metric sockets with10mm () in) square drives 11 Table 9 Dimensions of unified socke
15、ts with10mm () in) square drives 12 Table 10 Dimensions of BSF, BSW and Whitworth sockets with10mm () in) square drives 13 Table 11 Dimensions of long metric sockets with10mm () in) square drives 14 Table 12 Dimensions of long unified sockets with10mm () in) square drives 15 Table 13 Dimensions of m
16、etric sockets with12.5mm (“ in) square drives 16 Table 14 Dimensions of unified sockets with12.5mm (“ in) square drives 17 Table 15 Dimensions of BSF, BSW and Whitworth sockets with12.5mm (“ in) square drives 18 Table 16 Dimensions of long metric sockets with12.5mm (“ in) square drives 19 Table 17 D
17、imensions of long unified sockets with12.5mm (“ in) square drives 20 Table 18 Dimensions of long BSF, BSW and Whitworth sockets with12.5mm (“ in) square drives 21 Table 19 Dimensions of bi-square sockets with12.5mm (“ in) square drives for normal inch series 22 Table 20 Dimensions of metric sockets
18、with20mm (# in) square drives 23 Table 21 Dimensions of unified sockets with20mm (# in) square drives 24 Table 22 Dimensions of BSF, BSW and Whitworth sockets with20mm (# in) square drives 25 Table 23 Dimensions of metric sockets with25mm (1 in) square drives 26 Table 24 Dimensions of unified socket
19、s with25mm (1 in) square drives 27 Table 25 Dimensions of BSF, BSW and Whitworth sockets with25mm (1 in) square drives 28 Table 26 Dimensions of “T” handle square drives 28 Table 27 Dimensions of swivel handle nut spinners 29 Table 28 Dimensions of extensions 29 Table 29 Dimensions of flexible exten
20、sions 30 Table 30 Dimensions of universal joints 30 Table 31 Dimensions of speed braces 31 Table 32 Dimensions of ratchet handles 31BS4006:1992 BSI 07-1999 iii Page Table 33 Dimensions of spinner handles 32 Table 34 Dimensions of ratchet unit adaptors 33 Table 35 Dimensions of solid convertors 34 Li
21、st of references Inside back coverBS4006:1992 iv BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. The main features of this revision are: a) rationalization of drive and socket sizes has been made to
22、 align with the International Organization for Standardization (ISO); b) torque values have been aligned with ISO; c) types included reflect the demand for the improved design of socket now available. This standard supersedes BS4006:1987 which is withdrawn. Socket wrenches and accessories are identi
23、fied and specified by their drive size in metric units. To avoid any confusion therefore, the inch drive size in each of the tables is placed alongside in brackets. When selecting socket wrenches and accessories for a particular operation, care should be taken to ensure that the drive size is adequa
24、te for the load requirement and that either the single or the bi-hexagonal socket is defined. In this respect note should be taken of the proof loads specified in the tables. Guidance on the safe usage of sockets and accessories is given inAnnex B. Ratchet handles should not be used for final tighte
25、ning or initial releasing of tightened fasteners, since overloading can damage the internal mechanism. For precision tightening a torque wrench is recommended. The illustrations in this standard are examples only and are not intended to affect manufacturers designs. A British Standard does not purpo
26、rt to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front co
27、ver, pagesi toiv, pages1to34, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS4006:1992 BSI 07-1999 1 1 Scope This British Standard specifies
28、 dimensional, testing and design requirements for hand operated square drive socket wrenches and accessories. The across flats tolerances specified are in accordance with ISO691:1983. 2 Normative references This British Standard incorporates, by reference, provisions from specific editions of other
29、publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this British Standard only when incorporated in it by updating or revision.
30、 3 Definitions For the purposes of this British Standard, the following definitions apply. 3.1 socket a steel component of cylindrical form having at one end an internal form to suit the head of a screwed fastener and at the other end an internal square form for the receipt of an external square on
31、a driving component 3.2 drive an arrangement whereby an external driving square fits into an internal square in such a manner that abutment between the surfaces of the external square and corresponding internal square prevents either member from rotating separately and enables torque applied to one
32、member to be transmitted to the other member 3.3 socket wrench a wrench consisting of the assembly of a socket with its driving components, designed solely for the purpose of applying a torque to screwed fasteners with hexagonal or square heads 3.4 bi-hexagon two internal hexagons formed coaxially a
33、t30 radial displacement to each other 3.5 bi-square two internal squares formed coaxially at45 radial displacement to each other 3.6 retaining device a means of ensuring that the socket is retained on the driving square when a socket wrench is assembled NOTETwo types can be used. a) A detachable ret
34、aining device, consisting of a spring loaded ball fitted to one face of the external square drive and engaging in a groove or hole in the driven square of the socket and detached in accordance with6.1.3. b) A lock-on retaining device, consisting of a spring loaded plunger fitted to one face of the e
35、xternal square drive and engaging in a hole in the internal square of the driven socket, thus giving a positive lock-on facility detachable only by depressing the plunger through the hole in the side of the socket to obtain release in accordance with6.1.4. 3.7 “T” handle an external driving square h
36、aving an eye through which a handle slides 3.8 swivel handle nut spinner an external driving square to which a steel bar is hinged 3.9 extension bar a bar having an external driving square at one end and an internal driven square at the other, the component being designed to form an extension coupli
37、ng piece between a socket and a drive 3.10 flexible extension an extension intended to serve a similar purpose to an extension bar, but so designed that the driving ends are joined to a flexible extension component 3.11 universal joint square drive a universal joint, one component of which has an in
38、ternal driven square and the other a driving square 3.12 speed brace a cranked bar having an external driving square at one end for driving a socket, and a hand grip at the other. The axis of the hand grip is coincidental with the driving square 3.13 ratchet handle a means of applying a driving torq
39、ue in one direction so that, when the handle is rotated in the opposite direction, no significant reverse torque is appliedBS4006:1992 2 BSI 07-1999 3.14 spinner handle a component consisting of a bar having an external driving square formed at one end and a hand grip at the other 3.15 adaptor a com
40、ponent for connecting different drive sizes 4 Materials Hand operated square drive sockets and accessories shall be manufactured from any alloy steel having the mechanical properties required to ensure that the sockets and accessories satisfy the requirements of this standard. 5 Hardness Sockets and
41、 accessories shall have hardness values within the range39HRC to46HRC inclusive. Where boron steel is used, the hardness value shall be increased within the range44HRC to48HRC. NOTEThis improves strength and surface hardness without increased brittleness. 6 Design and manufacture 6.1 General 6.1.1 T
42、he sockets and all accessories shall be free from cracks, flashes, scale and other deleterious defects. 6.1.2 The socket openings shall be formed centrally within the body of the socket. NOTEThe outer end of the hexagon, bi-hexagon or bi-square opening may be chamfered at a120 inclusive angle from t
43、he across corners dimension to facilitate engagement onto a fastener. 6.1.3 Form A detachable sockets and accessories shall be so designed and manufactured that the external square drive can be readily inserted into the corresponding internal square drive. Each external square drive shall be fitted
44、with a retaining device in the form of a spring loaded ball or plunger and each internal square drive shall have a hole or groove in one or more faces to accept the locking ball. The retaining device shall be positively fitted so as to prevent unintentional detachment of the socket. The minimum forc
45、e required to detach a socket from a component of corresponding drive size shall be in accordance withTable 1. The minimum detachment force shall be met with the locking device engaged under any combination of the specified dimensions (seeTable 2). Table 1 Minimum detachment forces for nominal size
46、of drive 6.1.4 Form B lock-on sockets and accessories shall be so designed and manufactured that the external square drive can be readily inserted into the corresponding internal square drive. Each external square drive shall be fitted with a retaining device in the form of a spring loaded plunger a
47、nd each internal square drive shall have a hole in one or more faces, for the purpose of accepting the locking device and ensuring that the socket can only be detached by depressing the plunger through the hole in the side of the socket to obtain release. 6.2 Accessories 6.2.1 “T” handle square driv
48、e The driving member shall have a hole bored at90 relative to the longitudinal axis of the external square drive to accept the handle. 6.2.2 Swivel handle The handle shall be permanently hinged to the driving member in such a manner that torque can be transmitted to an attached socket through360 whe
49、n the handle is offset from the longitudinal axis of the driving member and socket by any amount not exceeding90 . 6.2.3 Extension bar The extension bar shall have an external square drive at one end and an internal square drive at the other. 6.2.4 Flexible extension The extension shall have an external square drive at one end and an internal square drive at the other, and shall be so designed and manufactured that torque can be t
