Part Number: 14-20X1LOWHDSHC (Low head socket cap)Part Number: 516-18X1-34LOWH (Low head socket cap)Part Number: 72531-4-C16Z (Low head socket cap)Part Number: 75234-A19 (Low head socket cap)Part Number: T75234-A19 (Low head socket cap)Part Number: T75234A19TERRYSTEA (Low head socket cap)