Top Quality English Made Triumph & BSA “Oil In Frame” Models Bottom Fork Leg Cap Stud. Broke your stud? Well this is Exactly what you need to get back in working order! Stud comes with a Zinc Plated Finish! Measures 5/16″ X 1 7/8″ with a Thread Pitch of 18 TPI & 24 TPI. Fits all Triumph 650 & 750 Unit Twins (Bonneville, T120R, T140, Tiger, TR7, TR6R, Etc) from 1971-1982. Fits BSA Unit Twins (Lightning, Thunderbolt, Etc) from 1971-1973. Also fits Triumph & BSA Triples from 1971-1976. Please refer to your parts catalog for proper fitment.*****Please note that this Stud will only fit “Oil In Frame” Twins & Triples Only from 1971 & On!*****Made in EnglandO.E.M Part number is 21-2102