New Triumph and BSA "oil in frame" twins swing arm bolt pivot bolt. Bolt is made in England by L.F. Harris to replace Triumph and BSA part number 21-2087 and S2087. Measures 10 1/2" X 5/8" with a thread pitch of 18 TPI. Fits all Triumph and BSA twins (A65, TR6, TR7, T120, T140, etc) from 1971-1983. Check your parts book to ensure the best fitment.