GGG-B-500C, FEDERAL SPECIFICATION: BLOCK, TACKLE (WIRE ROPE) (11-OCT-1983)
GGG-B-500C, FEDERAL SPECIFICATION: BLOCK, TACKLE (WIRE ROPE) (11-OCT-1983)., This specification covers single-sheave snatch and single- and multiple-sheave ordinary wire rope tackle blocks for regular and heavy duty use.