WRENCH,wheel bearing nut,octagon,( 8 sided ),3 7/16 opening,3/4 sq.-drive with 2.072 tubular pilot ,5 in long,picture is on pg 23 of TM 9-1819AC ORDANANCE MANUAL,basically it is a 3 7/16 8 sided socket,you can get a cheapie at any truck shop,the original has a pilot on it that goes up in the...