BS 6040(1981) : 1981

National foreword
Cooperating organizations
Terminology and nomenclature
1. Scope and field of application
2. Screw threads
3. Shapes of heads
4. Forms of shank
5. Screw and bolt ends
6. Driving features
7. Hexagon bolts and screws
8. Hexagon socket head cap screws
9. Square head bolts
10. Triangle head bolts
11. Octagonal head bolts
12. 12 point screws
13. T-head bolts
14. Round head bolts
15. Countersunk flat bolts
16. Slotted head screws
17. Cross recessed head screws
18. Screws with captive components
19. Miscellaneous bolts and screws
20. Screw plugs
21. Studs
22. Headless screws
23. Slotted and hexagon socket set screws
24. Self-tapping screws
25. Wood screws
26. Thread cutting (metallic drive) screws
27. Thread forming screws (thread formed by deformation)
28. Hexagon nuts
29. Square ntus
30. Triangle nuts
31. Octagon and pentagon nuts
32. 12 point nuts (bihexagonal nuts)
33. Prevailing torque nuts
34. Slotted castle nuts
35. Cap nuts
36. Miscellaneous round nuts
37. Other miscellaneous nuts
38. Washers
39. Spring washers
40. Tab washers
41. Split pins

Provides the terminology and nomenclature of bolts, screws, nuts and accessories in English, French, Russian, German, Italian and Spanish, recommended for use unless otherwise specified in the appropriate product standard. Generally items have been selected from existing national standards some are obsolescent types so that their terminology may be standardized at the same time. Includes diagrammatic drawings which are recommended to be used as a base whenever possible.