إدراج قفل الخيط، داخلي 1/4 بوصة-20، خارجي 3/8 بوصة-16

Bought a pack to drop the thread on my T-slot nuts from 3/8"-16 down to 1/4"-20, and the reduction is exactly as specified. They thread in cleanly without any wobble, so I've already got two blocks locked together solidly.

Worked perfectly for bolting my 1-2-3 blocks together—the 3/8"-16 to 1/4"-20 reduction came out dead straight, no wobble. Threads cut cleanly and the insert seated flush without any burrs. Exactly what I needed to adapt those T-slot nuts too.

The external threads grabbed the 3/8"-16 hole without any wobble, and now my 1-2-3 blocks sit flush like they're meant to be one piece. It's a simple reducer, but it saves me from drilling a bigger hole every time.