BS 1769:1951
Current
The latest, up-to-date edition.
Specification. Unified black hexagon bolts, screws, nuts (UNC & UNF threads). Heavy series
Hardcopy , PDF
English
24-09-1951
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Co-operating organizations
Foreword
1 Scope
2 Material
3 Finish
4 Dimensions
5 Length of bolts and screws
6 Ends of bolts and screws
7 Screw threads
8 Length of thread
9 Chamfering
10 Machined nuts - squareness of thread to face
11 Diameter of shank of bolts
12 Marking
Appendix A - Formulae
Appendix B - Details of identification marking for
Unified hexagon bolts
Dimensions, general requirements for sizes ½ in to 2 in. Dimensions of bolts, screws, ordinary nuts, lock nuts, slotted nuts, bolts faced under the head and machined on shank, machined nuts. Formulae for calculation of dimensions for bolts, screw heads, nuts in intermediate sizes, and sizes larger than 2 in.
| Committee |
FME/9
|
| DevelopmentNote |
Reviewed and confirmed by BSI, March 2013. (03/2013)
|
| DocumentType |
Standard
|
| Pages |
18
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| SupersededBy |
This British Standard relates to the Heavy Series of Unified black hexagon bolts, screws and nuts having Unified screw threads in a range of nominal sizes from ½ in. to 2 in. inclusive.
NOTE It is considered that the range of nominal sizes included in this standard is adequate for most of the applications for which this series is likely to be employed, but for the convenience of users requiring larger sizes, the formulae from which the proportions for bolt heads and nuts are derived are given in Appendix A.
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