Sea Dog Stainless Steel Replacement Gas Cap, 1.5 Inch - 12 NPSM Thread
Sea Dog Stainless Steel Replacement Gas Cap, 1.5 Inch - 12 NPSM Thread, Replacement Cap 351350 - 351353. Cap threads are 1-1/2" - 12 NPSM - Straight. Gas, diesel and water caps include attachment chains.