BS 811:1950
Current
The latest, up-to-date edition.
Specification for cycle (B.S.C.) threads (formerly known as C.E.I. threads)
Hardcopy , PDF
English
24-05-1950
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Cooperating organizations
Foreword
Specification
1. Form of cycle thread
2. Dimensions
3. Classes of fit
4. Stainless steel components
5. Internal threads
6. Tolerances on effective diameter, pitch and
flank angles
7. Designation of B.S. cycle threads
Tables
Cycle threads for bolts, nuts and similar applications
1. Basic dimensions
2. Bolts, Close class
3. Bolts, Medium class
4. Bolts, Free class
5. Nuts, Close class
6. Nuts, Medium class
7. Nuts, Free class
Cycle threads for spokes and nipples
8. Basic dimensions
9. Spokes, Medium class
10. Nipples, Medium class
Cycle threads for special applications
11. Basic dimensions
12. Male threads, Medium class
13. Female threads, Medium class
Appendices
A. B.S. Whitworth form threads for bolts, nuts and
similar applications
B. Bases of tolerances for cycle threads
C. Tolerances on pitch and angle in relation to
tolerance on effective diameters
Form and dimensions for bolts, nuts, spokes, nipples and special applications. Table of limits and tolerances for threads, for bolts and nuts and for special applications.
| Committee |
GME/25
|
| DevelopmentNote |
Reviewed and confirmed by BSI, May 2009. (04/2009)
|
| DocumentType |
Standard
|
| Pages |
24
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Standards | Relationship |
| UNE-EN IEC 61400-3-1:2021 | Identical |
| BS 3382-7:1966 | Specification for electroplated coatings on threaded components Thicker platings for threaded components |
| BS 3382-3&4(1965) : 1965 | SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - NICKEL OR NICKEL PLUS CHROMIUM ON STEEL COMPONENTS - NICKEL OR NICKEL PLUS CHROMIUM ON COPPER AND COPPER ALLOY (INCLUDING BRASS) COMPONENTS |
| BS 1936-1:1952 | Undercuts and runouts for screw threads Inch screw threads |
| BS 3382-1&2(1961) : 1961 | SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - CADMIUM ON STEEL COMPONENTS - ZINC ON STEEL COMPONENTS |
| BS 3382-5&6(1967) : 1967 | SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - TIN ON COPPER AND COPPER ALLOY (INCLUDING BRASS) COMPONENTS - SILVER ON COPPER AND COPPER ALLOY (INCLUDING BRASS) COMPONENTS |
| BS 919-2:1971 | Specification for screw gauge limits and tolerances Gauges for screw threads of Whitworth and BA forms |
| BS 919-2:2007 | Screw gauge limits and tolerances Specification for gauges for screw threads of Whitworth and B.A. forms |
| BS 2453:1973 | Specification for steel wire for spokes |
| BS 7371-12:2008 | Coatings on metal fasteners Requirements for imperial fasteners |
| 08/30173610 DC : DRAFT FEB 2008 | BS 7371-12 - COATINGS ON METAL FASTENERS - PART 12: REQUIREMENTS FOR IMPERIAL FASTENERS |
| BS 1802:1951 | Specification for steel spring washers for general engineering and automobile purposes |
| BS 84:1956 | Specification for parallel screw threads of Whitworth form |
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