New Triumph Connecting Rod Bolt Nut. Nut is made in England by L.F. Harris to exceed O.E.M. specifications. Made from forged blanks as originals - replaces Triumph part number 21-2016 and S2016. 

Nut measures 5/16" with a 24 TPI thread pitch (UNF) - sold individually. Fits various Triumph twins and triples from approx 1969 and on with the correct rod bolts (thread pitch). Please refer to your parts catalog for proper fitment.