This set of 4.3mm Grade 5 Ti64 Titanium ball studs use the correct vintage 4-40 treads and are made in the USA!  These are a great hop-up for your shelf queen or vintage racer XXT-CR. 

This is a generic pictures of our ball studs with an updated picture to be uploaded shortly.  Vintage Losi Studs use a round collar insteadof the hex collar.  A 2mm hex is present in the top of the ball for installation.