Used on 3990-01-444-6174 bitum distributor. 2b 1st end thread class 2320-01-097-0248, 2320-01-097-0249, 2320-01-100-7672, 2320-01-097-0260, 2320-01-195-7641, hemtt family (heavy expanded mobility tactical trucks) ; grumman a-10 aircraft unf 1st end thread series