RR-S-550D, FEDERAL SPECIFICATION: SOCKETS, WIRE ROPE (07-FEB-1980)

RR-S-550D, FEDERAL SPECIFICATION: SOCKETS, WIRE ROPE (07-FEB-1980)., This specification covers mechanical sockets for mechanical wire ropes used in rigging, hoisting, towing, stowage, excavating, logging and stump removing equipment, and marine applications.