BSI - BS A 401-420
AEROSPACE SERIES Specification for screws, pan and 100° countersunk head, hexalobular drive recess (unified threads below 1⁄4 inch) in various materials
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| Organization: | BSI |
| Publication Date: | 31 October 2015 |
| Status: | active |
| Page Count: | 36 |
| ICS Code (Bolts, screws, studs): | 49.030.20 |
Document History
BS A 401-420
October 31, 2015
AEROSPACE SERIES Specification for screws, pan and 100° countersunk head, hexalobular drive recess (unified threads below 1⁄4 inch) in various materials
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