This nock set tying thread is perfect for tying in your nock set. It is an ideal diameter for use with the center serving used on any of our strings. Comes with enough to tie in 3 nock sets (both top and bottom). 
 
Learn the OCD-recommended method for tying in your nock set! There are many different ways to tie in a nock set but this method is what we prefer because it is movable and can be micro-adjusted so you don't have to cut the whole thing off if you need to move it just a little.