1、BRITISH STANDARD BS ISO 8992:2005 Fasteners General requirements for bolts, screws, studs and nuts ICS 21.060.10; 21.060.20 BS ISO 8992:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 27 April 2005 BSI 27 April 2005 ISBN 0 580 45906 3 Na
2、tional foreword This British Standard reproduces verbatim ISO 8992:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee FME/9, Nuts, bolts and accessories steering committee, to Subcommittee FME/9/3, Dimensional work on fast
3、eners, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the sec
4、tion entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.
5、Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor re
6、lated international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in t
7、his document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 8992:2005(E) OSI 5002INTERNATIONAL STANDARD ISO 8992 Second edition 2005-04-15 Fasteners General requirements for bolts, screws, studs and nuts lments de fixation
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13、BSISO8992:2005IS:2998 O5002(E) I SO 5002 All irthgs ersedevr iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical co
14、mmittees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with th
15、e International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Internati
16、onal Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be
17、the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8992 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 7, Reference standards for fasteners (mainly covering terminology, dimensioning, sizes and tolerancing). Th
18、is second edition cancels and replaces the first edition (ISO 8992:1986), which has been technically revised. BSISO8992:2005blank 5002:2998OSISBINTENRATIONAL TSANDADR IS:2998 O5002(E)I SO 5002 All irthgs ersedevr 1Fasteners General requirements for bolts, screws, studs and nuts 1 Scope This Internat
19、ional Standard specifies the general requirements for standardized bolts, screws, studs and nuts, but is also recommended for these non-standardized fasteners. It is intended to be used with reference to the related International Standards on tolerances, mechanical and performance characteristics, g
20、eometrical features, surface discontinuities, surface finishes and quality aspects. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of th
21、e referenced document (including any amendments) applies. ISO 272, Fasteners Hexagon products Widths across flats ISO 885, General purpose bolts and screws Metric series Radii under the head ISO 888, Bolts, screws and studs Nominal lengths, and thread lengths for general purpose bolts ISO 898-1, Mec
22、hanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs ISO 898-2, Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread ISO 898-5, Mechanical properties of fasteners made of carbon steel and alloy steel Part 5: Se
23、t screws and similar threaded fasteners not under tensile stresses ISO 898-6, Mechanical properties of fasteners Part 6: Nuts with specified proof load values Fine pitch thread ISO 898-7, Mechanical properties of fasteners Part 7: Torsional test and minimum torques for bolts and screws with nominal
24、diameters 1 mm to 10 mm ISO 965-1, ISO general-purpose metric screw threads Tolerances Part 1: Principles and basic data ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality ISO 965-3, ISO genera
25、l purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threads ISO 965-4, ISO general purpose metric screw threads Tolerances Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G
26、 after galvanizing BSISO8992:2005IS:2998 O5002(E) 2 I SO 5002 All irthgs ersedevrISO 965-5, ISO general purpose metric screw threads Tolerances Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before g
27、alvanizing ISO 1478, Tapping screws thread ISO 2320, Prevailing torque type steel hexagon nuts Mechanical and performance properties ISO 2702, Heat-treated steel tapping screws Mechanical properties ISO 3269, Fasteners Acceptance inspection ISO 3506-1, Mechanical properties of corrosion-resistant st
28、ainless-steel fasteners Part 1: Bolts, screws and studs ISO 3506-2, Mechanical properties of corrosion-resistant stainless-steel fasteners Part 2: Nuts ISO 3506-3, Mechanical properties of corrosion-resistant stainless-steel fasteners Part 3: Set screws and similar fasteners not under tensile stress
29、 ISO 3506-4, Mechanical properties of corrosion-resistant stainless-steel fasteners Part 4: Tapping screws ISO 3508, Thread run-outs for fasteners with thread in accordance with ISO 261 and ISO 262 ISO 4042, Fasteners Electroplated coatings ISO 4753, Fasteners Ends of parts with external ISO metric
30、thread ISO 4755, Fasteners Thread undercuts for external metric ISO threads ISO 4757, Cross recesses for screws ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 6157-1, Fasteners Surface discontinuities Part 1: Bolts, screws and studs for gener
31、al requirements ISO 6157-2, Fasteners Surface discontinuities Part 2: Nuts ISO 6157-3, Fasteners Surface discontinuities Part 3: Bolts, screws and studs for special requirements ISO 7085, Mechanical and performance requirements of case hardened and tempered metric thread rolling screws ISO 7378, Fas
32、teners Bolts, screws and studs Split pin holes and wire holes ISO 7721, Countersunk head screws Head configuration and gauging ISO 8839, Mechanical properties of fasteners Bolts, screws, studs and nuts made of non-ferrous metals ISO 10664, Hexalobular internal driving feature for bolts and screws IS
33、O 10666, Drilling screws with tapping screw thread Mechanical and functional properties ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings ISO 10684, Fasteners Hot-dip galvanized coatings ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners ISO 16426, Fasteners
34、Quality assurance system BSISO8992:2005IS:2998 O5002(E) I SO 5002 All irthgs ersedevr 33 Specifications and reference standards See Tables 1 and 2. Table 1 Fasteners with ISO metric screw threads Material Carbon steel Alloy steel Stainless steel Non-ferrous metal Tolerances ISO 4759-1 Mechanical and
35、 performance characteristics ISO 898-1 ISO 898-2 ISO 898-5 ISO 898-6 ISO 898-7 ISO 2320 ISO 7085 ISO 3506-1 ISO 3506-2 ISO 3506-3 ISO 8839 Geometrical features Thread Driving features Ends of parts Countersunk head Others ISO 965-1, ISO 965-2, ISO 965-3, ISO 965-4, ISO 965-5 ISO 272, ISO 4757, ISO 1
36、0664 ISO 4753 ISO 7721 ISO 885, ISO 888, ISO 3508, ISO 4755, ISO 7378 Surface discontinuities ISO 6157-1 ISO 6157-2 ISO 6157-3 Surface finish ISO 4042 ISO 10683 ISO 10684 ISO 16048 ISO 4042 Quality aspects ISO 3269, ISO 16426 Table 2 Fasteners with tapping screw threads Material Steel Stainless stee
37、l Tolerances ISO 4759-1 Mechanical and performance characteristics ISO 2702 ISO 10666 ISO 3506-4 Geometrical features Thread Driving features Ends of parts Countersunk head ISO 1478 ISO 4757, ISO 10664 ISO 1478 ISO 7721 Surface finish ISO 4042 ISO 10683 ISO 10684 ISO 16048 Quality aspects ISO 3269,
38、ISO 16426 BSISO8992:2005IS:2998 O5002(E) 4 I SO 5002 All irthgs ersedevr4 General requirements Standardized bolts, screws, studs and nuts are defined by the following elements: a) mechanical properties (property class, material); b) product grade (tolerances); c) standardized geometrical features (i
39、f any); d) surface coatings (if required); e) special requirements (if agreed). All information relates to fully manufactured products. Specific manufacturing processes are not required, except where they have been laid down in the individual standards or have been agreed between customer and suppli
40、er. The product shall have intact surfaces and edges and shall be free of burrs consistent with the manufacturing methods used. It is not generally required that small burrs due to operations such as slotting, or resulting from forging, pressing or trimming, be removed. Any burr which influences the
41、 performance of the product or would be a safety hazard when handled, however, shall be removed. Trimming burrs beyond the bearing face of bolts and screws is not permissible. Centre holes for bolts and screws are permissible, unless otherwise specified. Unless a surface coating is agreed, the surfa
42、ce finish of the products shall be as processed for steel products, or plain for products made of stainless steel or non-ferrous metal. Bolts, screws, studs and nuts shall be delivered in a clean condition and lightly oiled, if no other conditions have been agreed. BSISO8992:2005blankBS ISO 8992:200
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