Triumph Twins Cable Abutment Nuts - Choose Year

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New Triumph twin cable abutment nut. This is an O.E.M. spec quality part that is ready to be installed - comes zinc plated. Replaces Triumph part number 57-1644, T1644, 57-3784 and T3784. There where 2 types of abutments used through out the years, below we will list the 2 types used. Use the drop down menu to select which abutment you desire based on your year. Early (57-1644 / T1644) Abutment has a thread pitch of 16 TPI (BSF) with a hollow body (no internal threads). Correct for Triumph 650 twins (Bonneville, T120R, 6T, T120TT, Tiger, TR6R, Etc) from 1963-1967 only. Also fits Triumph 350 & 500 Unit Twins (Daytona, T100R, T90, 3TA, 5TA, Etc) from approx 1961-1968. Late (57-3784 / T3784) Abutment has a thread pitch of 13 TPI with a hollow body (no internal threads). Correct for Triumph 500 twins (Daytona, T100R, T100T, T100S, etc) from approx 1969-1974. **Features** Zinc plated Made in England Replaces part number 57-1644, T1644, 57-3784 and T3784 Show more