MS51009D (NOTICE 1), MILITARY STANDARD: SPARK PLUG, SHIELDED, 18MM 1-1/4 INCH WELL (OTHER THAN AIRCRAFT) (18 APR 1990) [NO SUPERSEDING DOCUMENT].
MS51009D (NOTICE 1), MILITARY STANDARD: SPARK PLUG, SHIELDED, 18MM 1-1/4 INCH WELL (OTHER THAN AIRCRAFT) (18 APR 1990) [NO SUPERSEDING DOCUMENT].