BS 2779:1986

Superseded

View Superseded by

Specification for pipe threads for tubes and fittings where pressure-tight joints are not made on the threads (metric dimensions)

Available format(s)

Hardcopy , PDF

Superseded date

26-02-2003

Language(s)

English

Published date

29-08-1986

Publisher

British Standards Institution

Foreword
Committees responsible
Specification
1. Scope
2. Symbols
3. Classification and designation
4. Thread details
Appendices
A. Special truncated form of the Whitworth thread
     for class A external threads
B. Notes on tolerancing system structure
C. Method of verification of thread size and form by
     means of limit gauges
D. Gauges for the method given in appendix C
Tables
1. Basic dimensions and tolerances
2. Special truncated fastening threads, class A
     external threads
3. Dimensions for GO and NOT GO gauges and their
     check plugs for class A external threads and for
     GO gauges and their check plugs for class B external
     threads
4. Other values for GO and NOT GO gauges and their
     check plugs for class A and class B external threads
     as a function of the pitch, P
5. Dimensions for NOT GO gauges and their check plugs
     for class B external threads
6. Dimensions for threaded GO and NOT GO plug gauges
7. Other values for GO and NOT GO plug gauges as a
     function of the pitch, P
Figures
1. Thread profile and tolerance zones
2. Special truncated external thread
3. NOT GO screw calliper gauge
4. Start of complete thread
5. Chamfer of start of thread
6. Thread profiles of GO ring gauges and their check
     plugs
7. Relative positions of pitch diameter tolerance zones
     for GO ring gauges and their check plugs
8. Thread profiles of NOT GO ring gauges and their
     check plugs and calliper gauges
9. Relative positions of pitch diameter tolerance
     zones for NOT GO ring gauges, calliper gauges and
     their check plugs
10. Thread profiles of GO and NOT GO plug gauges
11. Relative positions of pitch diameter tolerance
     zones for GO and NOT GO plug gauges

Designation and dimensions for Whitworth form fastening pipe threads of sizes $9A to 6 inclusive. Includes appendices for recommended gauging systems.

Committee	MCE/18
DevelopmentNote	Supersedes 85/75381 DC, BS 2779(1973), BS 2779(1956). (07/2002)
DocumentType	Standard
Pages	20
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS EN ISO 228-2:2003 BS EN ISO 228-1:2003

ISO 228-2:1987	Pipe threads where pressure-tight joints are not made on the threads Part 2: Verification by means of limit gauges
ISO 228-1:2000	Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation