New UK Made Triumph & BSA Slotted Alloy Inspection Plug Screw With O-Ring. This plug is great for engine, primary and gear box inspection holes! Comes with a nice finish but can easily polished to a mirror finish! Fits a wide range of Triumph Singles, Twins & Triples (Bonneville, T120, Tiger, TR6, T140, Trident, TR25W, Etc) all the way though the 1970’s. Also fits many BSA Singles, Twins & Triples (Lightning, Hornet, B25, C25, B50, Rocket III, Victor, Etc) from the 1960’s-1970’s. Please refer to your parts catalog for proper fitment.*****Please note that this plug may fit other Triumph & BSA models that are not listed above! Always check your part book for proper fitment.*****Made in the UKO.E.M Part number is 57-2166, 70-9816, 70-8231, 40-0715 or 40-0238