MIL-STD-421A, MILITARY STANDARD: CHAIN, ROLLER; POWER TRANSMISSION AND CONVEYOR, FLAT LINK PLATES; BASE PITCH, SINGLE AND MULTIPLE STRAND; CONNECTING LINKS AND ATTACHMENT LINKS (04 DEC 1967) [S/S BY ANSI-B29.1]

MIL-STD-421A, MILITARY STANDARD: CHAIN, ROLLER; POWER TRANSMISSION AND CONVEYOR, FLAT LINK PLATES; BASE PITCH, SINGLE AND MULTIPLE STRAND; CONNECTING LINKS AND ATTACHMENT LINKS (04 DEC 1967) [S/S BY ANSI-B29.1]., This is a design standard covering type 1 RC, Chain, roller: Power Transmission and Conveyor, Flat Link Plates; Base Pitch, Multiple Strand and Connecting Links (CL) and Attachment Links