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NAS1800:2021
Current
The latest, up-to-date edition.
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RECESS, SIX LOBE DRIVE, INTERNAL, DIMENSIONS FOR RECESS AND GAGES
Hardcopy
English
30-06-2021
This design standard defines the dimensional requirements for internal six lobe drive-internal recess head fasteners in 100° shear and tension flush heads and pan heads.
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