BS 2779:1986
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Specification for pipe threads for tubes and fittings where pressure-tight joints are not made on the threads (metric dimensions)
Hardcopy , PDF
26-02-2003
English
29-08-1986
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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Superseded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 |
| 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 |
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