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Correct for BSA Unit Twins (Lightning
Rod Measures 21" in length with a thread pitch of 26 TPI (CEI)
Measures approx 6 1/2" eye to eye
* New English Made Norton / Universal Type Reproduction Oil Filter Mounting Head Block
) from 1957-1974
Triumph Twins Cable Abutment Nuts - Choose Year Year:Late (57-3784 / T3784) Correct for BSA Unit TwinsNew 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