MIL-STD-421B (NOTICE 1), MILITARY STANDARD: CHAIN, ROLLER; POWER TRANSMISSION AND CONVEYOR, FLAT LINK PLATES; BASE PITCH, SINGLE AND MULTIPLE STRAND; CONNECTING LINKS AND ATTACHMENT LINKS (28 FEB 1978) [S/S BY ANSI-B29.1]

MIL-STD-421B (NOTICE 1), MILITARY STANDARD: CHAIN, ROLLER; POWER TRANSMISSION AND CONVEYOR, FLAT LINK PLATES; BASE PITCH, SINGLE AND MULTIPLE STRAND; CONNECTING LINKS AND ATTACHMENT LINKS (28 FEB 1978) [S/S BY ANSI-B29.1]., MIL-STD-421B, dated 11 March 1975, is hereby canceled. The contents of the standard are covered by ANSI B29.1, Transmission Roller Chains, Attachments and Sprockets.