BSI BS 2 A 60 Specification for Cadmium-Plated Steel Hexagonal-Headed Shear Bolts (B.S.F. Threads) for Aircraft - PD 4733: November 28, 1962; PD 5303: August 12, 1964; AMD 2112: October 29, 1976; AMD 2584: April 28, 1978; AMD 7660: April 15, 1993
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