MS20426L (NOTICE 1), MILITARY STANDARD: RIVET, SOLID, COUNTERSUNK 100 DEG., PRECISION HEAD, ALUMINUM AND TITANIUM COLUMBIUM ALLOY (18 AUG 1998) [SUPER
MS20426L (NOTICE 1), MILITARY STANDARD: RIVET, SOLID, COUNTERSUNK 100 DEG., PRECISION HEAD, ALUMINUM AND TITANIUM COLUMBIUM ALLOY (18 AUG 1998) [SUPERSEDING AN426] [S/S BY NASM20426].