Used on mrap - unique nsn - 4 mrap variants. plug, 5/8 cup 5/8 cup plug, outside dia- .636 min - .639 max, over ht, .240 min- .280 max, crown ht- .049 min - .075 max, stock thkns .042 nom +- 003, rec hole dia, .629 min - .631 max. stainless steel plugs must be stamped with the letter s. plugs will be furnished plain, plated, or coated as designated by part number.
