DEFSTAN 51-18/1(1986) : 1986
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
SCREWDRIVER RECESSES (HIGH PERFORMANCE)
08-02-1991
12-01-2013
Defines screwdriver recesses(high performance) for driving aircraft structural fasteners M4 to M24 shank diameter.
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