BS A 273:1978
Current
The latest, up-to-date edition.
Specification for gauging practice for 100° countersunk head fasteners for flushness control
Hardcopy , PDF
English
31-01-1978
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FOREWORD
1 SCOPE
2 GENERAL REQUIREMENTS
3 PRINCIPLES OF FLUSHNESS CONTROL AND
RECOMMENDED GAUGING PRACTICE
Specifies the principles of flushness control and the recommended gauging practice for 100 degree countersunk head fasteners.
| Committee |
ACE/12
|
| DevelopmentNote |
Partially supersedes BS A211(1961) Supersedes 76/75414 DC (10/2005) Reviewed and confirmed by BSI, April 2008. (03/2008)
|
| DocumentType |
Standard
|
| Pages |
8
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
BS A273 describes the principles of flushness control and the recommended gauging practice for 100° countersunk head fasteners.
| 15/30329889 DC : 0 | BS A 266 TO 271 - BOLT, 100 DEGREES COUNTERSUNK HEAD, HI-TORQUE SPEED DRIVE RECESS, UNJF THREAD, SPLIT PIN HOLE OPTION, TITANIUM ALLOY, VARIOUS FINISHES, CLASSIFICATION: 80 TF/IN[2] (1100 MPA) AT TA/+315 DEGREES C |
| BS 2A 266 to 2A 271:2016+A1:2019 | Aerospace Series. Bolt, 100° Countersunk head, Hi-Torque speed drive recess, close tolerance shank, UNJF thread, split pin hole option, titanium alloy, various finishes. Classification: R<sub>m</sub> 1100–1250 MPa (160 000–180 000 lbf/in<sup>2</sup>) at Ambient Temperature | +315 °C |
| 15/30281806 DC : 0 | BS A 401 TO A 420 - AEROSPACE SERIES - SPECIFICATION FOR SCREWS, PAN AND 100 DEGREES COUNTERSUNK HEAD, HEXALOBULAR DRIVE RECESS (UNIFIED THREADS BELOW 1/4 INCH), VARIOUS MATERIALS |
| BS A 401-420:2015 | Specification for screws, pan and 100° countersunk head, hexalobular drive recess (unified threads below ¼ inch) in various materials |
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