Oil tank outlet union and strainer with straight outlet. Suit Nortons. Thread OD 1 inch x 20tpi takes 5/16 hose. Will fit all Norton oil tanks back to the 20s and to 1978. Use BT-3589 for the union washer. Original Norton Part Number: D12/292; L4/292; 19379; 25348 - Oil tank union with gauze 3588; A2/292; A22/292; E2/292; 14329; 14375; 18347;19379; E6621; L4/292 - singles