1、BRITISH STANDARD BS 7764:1994 Specification for Hexagon slotted nuts and castle nutsBS7764:1994 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comesintoeffect on 15December1994 BSI 09-1999 The
2、 following BSI references relate to the work on this standard: Committee reference GME/9 Draft for comment 93/714881DC ISBN 0 580 23200 X Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GME/9, upon which the following bod
3、ies were represented: BEAMA Ltd. British Constructional Steelwork Association Ltd. British Industrial Fasteners Federation British Steel Industry British Steel Industry (Wire Section) Gauge and Tool Makers Association National Association of Fastener Stockholders Society of Motor Manufacturers and T
4、raders Limited Washer Manufacturers Association of Great Britain The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Defence Manufacturers Association General Municipal Boilermaker and Allied Trades Union Screw Thread Tool Manufacturers Assoc
5、iation Society of British Aerospace Companies Limited Amendments issued since publication Amd. No. Date CommentsBS7764:1994 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Dimensions 1 4 Characteristics 1 5 Designation 1 Figure 1
6、 Dimensions of slotted nuts 3 Figure 2 Dimensions of castle nuts 4 Table 1 Dimensions of hexagon slotted nuts and castle nuts 2 Table 2 Characteristics of hexagon slotted nuts and castle nuts 3 List of references Inside back coverBS7764:1994 ii BSI 09-1999 Foreword This British Standard has been pre
7、pared by Technical Committee GME/9 to provide a standard for hexagon slotted and castle nuts. 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 with a British Standard does n
8、ot 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 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This wi
9、ll be indicated in the amendment table on the inside front cover.BS7764:1994 BSI 09-1999 1 1 Scope This British Standard specifies the requirements for hexagon slotted nuts and castle nuts with ISO metric coarse pitch threads for a range of values from M4 to M64 inclusive. 2 Normative references Thi
10、s British Standard incorporates by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subse
11、quent amendments to or revisions of the cited publication apply to this British Standard only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publications applies, together with any amendments. 3 Dimensions The dimensions of hexago
12、n slotted nuts and castle nuts shall be as given inTable 1 andFigure 1 andFigure 2. 4 Characteristics The characteristics of hexagon slotted nuts and castle nuts shall be as given inTable 2. 5 Designation When designating nuts for the purpose of an enquiry or order, the following information shall b
13、e given: a) the material; b) whether the product is to be washer faced; c) general product description, i.e. hexagon slotted nut; d) the letter “M” indicating that the product is ISO metric; e) the nominal size (thread diameter) of the product in millimetres; f) the property class of the product; g)
14、 the number of this British Standard, i.e. BS7764:1994; h) details of the coating (if required) and the relevant British Standard where applicable. Example The designation of a steel M12 washer faced hexagon slotted nut of property class8 is as follows: Steel washer faced hexagon slotted nut M12 pro
15、perty class8 to BS7764:1994.BS 7764:1994 2 BSI 09-1999 Table 1 Dimensions of hexagon slotted nuts and castle nuts Dimensions in millimetres d M4 M5 M6 M8 M10 M12 (M14) M16 (M18) M20 (M22) M24 (M27) M30 (M33) M36 (M39) M42 (M45) M48 (M52) M56 (M60) M64 p 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.
16、5 3.5 4 4 4.5 4.5 5 5 5.5 5.5 6 c max. 0.4 0.5 0.5 0.6 0.6 0.6 0.6 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 1 1 1 1 1 1 1 1 d a min. 4 5 6 8 10 12 14 16 18 20 22 24 27 30 33 36 39 42 45 48 52 56 60 64 max. 4.6 5.75 6.75 8.75 10.8 13 15.1 17.3 19.5 21.6 23.7 25.9 29.1 32.4 35.6 38.9 42.1 45.4 48.6 51.8 56
17、.2 60.5 64.8 69.1 d e max. 16 19 22 25 28 30 34 38 42 46 50 55 58 62 65 70 75 80 85 min. 15.57 18.48 21.48 24.16 27.16 29.16 33 37 41 45 49 53.8 56.8 60.8 63.8 68.8 73.8 78.8 83.8 d w min. 5.9 6.9 8.9 11.6 14.6 16.6 19.6 22.5 24.8 27.7 31.4 33.2 38 42.7 46.6 51.1 55.9 59.9 64.7 69.4 74.2 78.7 83.4 8
18、8.2 e min. 7.66 8.79 11.05 14.38 17.77 20.03 23.36 26.75 29.58 32.95 37.29 39.55 45.2 50.85 55.37 60.79 66.44 71.3 76.95 82.6 88.25 93.56 99.21 104.86 m max. 5 6 7.5 9.5 12 15 16 19 21 22 26 27 30 33 35 38 40 46 48 50 54 57 63 66 min. 4.7 5.7 7.14 9.14 11.57 14.57 15.57 18.48 21.48 21.48 25.48 25.48
19、 29.48 32.38 34.38 37.38 39.38 45.38 47.38 49.38 53.26 56.26 62.26 65.26 m min. 2.32 3.52 3.92 5.15 6.43 8.3 9.68 11.28 12.08 13.52 14.48 16.16 18 19.44 21.92 23.52 25.44 25.92 27.52 29.12 32.32 34.72 37.12 39.3 n min. 1.2 1.4 2 2.5 2.8 3.5 3.5 4.5 4.5 4.5 5.5 5.5 5.5 7 7 7 7 9 9 9 9 9 11 11 max. 1.
20、45 1.65 2.25 2.75 3.05 3.8 3.8 4.8 4.8 4.8 5.8 5.8 5.8 7.36 7.36 7.36 7.36 9.36 9.36 9.36 9.36 9.36 11.43 11.43 s max. 7 8 10 13 16 18 21 24 27 30 34 36 41 46 50 55 60 65 70 75 80 85 90 95 min. 6.78 7.78 9.78 12.73 15.73 17.73 20.67 23.67 26.16 29.16 33 35 40 45 49 53.8 58.8 63.1 68.1 73.1 78.1 82.8
21、 87.8 92.8 w max. 2.9 4 5 6.5 8 10 11 13 15 16 18 19 22 24 26 29 31 34 36 38 42 45 48 51 min. 3.2 3.7 4.7 6.14 7.64 9.64 10.57 12.59 14.57 15.57 17.57 18.48 21.48 23.48 25.48 28.48 30.38 33.38 35.38 37.38 41.38 44.38 47.38 50.26 For Product Grade A see Table 2 For Product Grade B see Table 2 NOTE 1N
22、on-preferred sizes are shown in brackets. NOTE 2Castle nuts shall not be specified below M 12. NOTE 3Castle nuts above M 39 shall have eight slots.BS7764:1994 BSI 09-1999 3 Table 2 Characteristics of hexagon slotted nuts and castle nuts Characteristic Requirement Material Steel Stainless steel Non-f
23、errous metal Thread tolerance Conforming to class 6H of BS 3643-1:1981 and BS 3643-2:1981 Mechanical properties a Conforming to material property class 6, 8 or 10 of BS EN 20898-2:1992 Conforming to material property class A2-70 of BS 6105:1981 Conforming to BSEN28839:1992 Permissible dimensional de
24、viations and deviations of form Conforming to product grade A of BS 6322-1:1982 for thread sizes k M16 Conforming to product grade B of BS 6322-1:1982 for thread sizes M16 Finish As processed with a lubricant, unless otherwise agreed between the purchaser and supplier bc As processed, unless otherwi
25、se agreed between the purchaser and supplier c As processed, unless otherwise agreed between the purchaser and supplier c Acceptability In accordance with BS 6587:1985 a Including the marking requirement. b The lubricant shall contain a rust inhibitor unless otherwise agreed between the purchaser an
26、d supplier. c Alternative surface finishes (e.g. electroplating) may be applied, if agreed between the purchaser and supplier. Figure 1 Dimensions of slotted nutsBS7764:1994 4 BSI 09-1999 Figure 2 Dimensions of castle nutsBS7764:1994 BSI 09-1999 List of references (see clause2) Normative references
27、BSI publications BRITISH STANDARDS INSTITUTION, London BS 3643, ISO metric screw threads. BS 3643-1:1981, Principles and basic data. BS 3643-2:1981, Specification for selected limits of size. BS 6105:1981, Specification for corrosion-resistant stainless steel fasteners. BS 6322, Tolerances for faste
28、ners. BS 6322-1:1982, Specification for tolerances of bolts, screws and nuts with thread diameters U 1.6 mm andk 150 mm and product grades A, B and C. BS 6587:1985, Method of acceptance inspection for fasteners. BS EN 20898, Mechanical properties of fasteners. BS EN 29898-2:1992, Nuts with specified
29、 proof load values. BS EN 28839:1992, Mechanical properties of fasteners. Bolts, screws, studs and nuts made of non-ferrous metals. BS 7764:1994 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It
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