These are a set of 4 Stainless Steel rocker box bolts. They are the 1/4" diameter  ones  that go at the outer corners of the rocker box.

These were made for the unit construction 650 engines from 1968 onwards. They have 0.430" A/F hexagon heads  instead of the cross head screws fitted by triumph for cheapness. They are supplied together with 4 stainless rectangular sectioned lock washers.

The Triumph part number for these is 21-1875. The thread is long enough for them to be shortened so that they can also be used on the 6T. Please note these have a 1/4 UNC thread.

Please note all stainless parts should be assembled with copa slip (copper slip), which we also list on ebay.

These items are made in England.

Delivery to Portugal, Greece, Turkey and Spain is unreliable and cannot be guaranteed, if you order from these countries you do so at your own risk.  It is not uncommon for delivery to take 30 days or more.