BS 1906:1952

Cooperating organizations
Foreword
Specification
Part 1: 'Light' series, coned type (BSP threads)
1. Scope
2. Designation of size of coupling
3. Material
4. Dimensions
5. Screw threads
6. Hexagons
7. Tail-ends
8. Interchangeability
9. Hydraulic test
10. Workmanship
11. Inspection
12. Test facilities
Illustrations and tables of dimensions
Part 2: 'Medium' series, flat & coned types (BSP threads)
13. Scope
14. Designation of size of coupling
15. Material
16. Dimensions
17. Screw threads
18. Hexagons
19. Tail-ends
20. Interchangeability
21. Hydraulic test
22. Workmanship
23. Inspection
24. Test facilities
Illustrations and table of dimensions
Part 3: 'Heavy" series, flat and coned types (Unified
         threads)
25. Scope
26. Designation of size of coupling
27. Material
28. Dimensions
29. Screw threads
30. Hexagons
31. Interchangeability
32. Hydraulic test
33. Workmanship
34. Identification marking
35. Inspection
36. Test facilities
Illustrations and tables of dimensions
Appendices
A. Limits and tolerances for BS pipe (parallel)
     threads. Male threads - free fit
B. Limits and tolerances for BS pipe (parallel)
     threads. Female threads - free fit
C. Limits and tolerances for unified screw threads.
     Male thread
D. Limits and tolerances for unified screw threads.
     Female thread

\'Light\' series: coned type (paint spray equipment and other small appliances). \'Medium\' series: flat and coned types (light pneumatic tools in general engineering and allied industries). \'Heavy\' series: flat and coned types (heavy type pneumatic tools such as rock drills and kindred equipment in the mining and quarrying industries and civil engineering). Working pressures not exceeding 150 lb/sq in. Workmanship, interchangeability, hydraulic testing, materials. Screw threads (B.S.P. Whitworth threads for \'light\' and \'medium\', Unified for \'heavy\'). Illustrations, dimensions. See BS 1782.

Part 1 of this standard specifies requirements for hose couplings of ⅛ in., 3/16 in., ¼ in., 5/16 in., ⅜ in. and 3/2 in. nominal sizes, for use at pressures not exceeding 150 lb/sq. in.