Anchor shackles SpecificationsRound pin anchor shackle, U.S. type, drop forged Size(inch):3/16",1/4", 5/16:, ... ",3/4",7/8"~~2-1/2"Round pin anchor shackle, U.S. type, drop forgedSize(inch):3/16",1/4", 5 ... federal specification PR-C-271D Type IVA, Grade A, Class 11) A leading manufacturer of Round pin anchor shackle in China.2 ...