21-1999 / S1999, Nut, 5/16 UNF, Shouldered

Our Parts

We have a strong focus on the Oil-in-Frame Triumph Twins manufactured from 1971-83, however, we supply parts for all models and years of Classic Triumph Motorcycles.  When working with distributors we source UK made parts first.  However, in some cases, parts are just not made by UK manufacturers anymore, in those events we only select high quality parts from known sources. We're constantly filling any gaps in part #'s we may be missing by staying engaged with our distributors and jumping when new manufacturers come onto the scene, or by getting our hands on NOS and used parts that become available. We can't say this enough, if you don't see the part you're looking for, please email or call us.