BS 1936-1:1952
Current
The latest, up-to-date edition.
Undercuts and runouts for screw threads Inch screw threads
Hardcopy , PDF
English
31-12-1952
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Foreword
Introductory notes
1 Scope
2 Form of undercut
3 Limits of tolerance on diameters of undercuts
4 Thread runouts on external threads
5 Thread runouts on internal threads: recommended hole
tapping practice
6 Designation of undercuts and thread runouts
Appendix - Formulae for calculating widths of undercuts
And thread runouts
Provides data of dimensions and profiles of machined undercuts for external and internal threads of Unified, Whitworth, B.A. and Cycle thread forms. Dimensions and tolerances are given for standard cutting tools for this purpose and recommendations are made of widths of undercuts and runouts for various production requirements.
| Committee |
FME/9
|
| DevelopmentNote |
Reviewed and confirmed by BSI, October 2012. (09/2012)
|
| DocumentType |
Standard
|
| Pages |
16
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This British Standard relates to dimensions for profile and width of undercuts for external and internal threads of Unified, Whitworth, B.A. and Cycle thread forms and provides for a series of standard tools for producing the undercuts recommended. It makes recommendations concerning practice in regard to undercuts and relates also to allowances for thread runouts. It includes the following:–
- Nominal widths of machined undercuts and thread runouts (washout threads) produced from screwing tools.
- Recommendations for minimum widths of undercut or runout for various production requirements.
- Limits of tolerance on diameters of undercuts.
- Standard tools for undercuts.
- Formulae for calculating widths of undercuts and runouts. (See Appendix.)
| Standards | Relationship |
| AS B199-1962 | Identical |
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| BS 5200:1997 | Specification for dimensions of hydraulic connectors and adaptors |
| BS 1936-2:1991 | Undercuts and runouts for screw threads Specification for ISO metric screw threads |
| BS 1552:1982 | Specification for control plug cocks for low-pressure gases |
| UNI CEN/TS 16650 : 2014 | Specification for Hose Couplings for Petrol, Oil and Lubricants - High Pressure Couplings |
| 12/30243876 DC : DRAFT JULY 2012 | BS 746 - SPECIFICATION FOR GAS METER UNIONS AND ADAPTORS |
| S.R. CEN/TS 16650:2014 | SPECIFICATION FOR HOSE COUPLINGS FOR PETROL, OIL AND LUBRICANTS - HIGH PRESSURE COUPLINGS |
| PD CEN/TS 16650:2014 | Specification for hose couplings for petrol, oil and lubricants. High pressure couplings |
| 04/30043993 DC : DRAFT APR 2004 | BS 746 - SPECIFICATION FOR GAS METER UNIONS AND ADAPTORS |
| BS 7417:1991 | Specification for interface dimensions of flat face \'O\'-ring seal hydraulic couplings |
| CEN/TS 16650:2014 | Specification for hose couplings for petrol, oil and lubricants - High pressure couplings |
| BS 811:1950 | Specification for cycle (B.S.C.) threads (formerly known as C.E.I. threads) |
| BS 93:1951 | Specification for British Association (B.A.) screw threads with tolerances for sizes 0 B.A. to 16 B.A. |
| BS 949(1969) : LATEST | |
| BS 84:1956 | Specification for parallel screw threads of Whitworth form |
| BS 1936-2:1970 | Specification for undercuts and runouts for screw threads. ISO metric screw threads |
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