Wensilon(20 pcs) 1/4"-20 Coupling Nuts zinc, Extended Hexagon Plated Steel Rod Coupling Nuts

They work for what they were made for. I have no complaints. Good quality at a very reasonable price.

Used to extend foundation bolts

These 1/2" x 13 threaded rod couplings are awful. I cannot thread any from the 10 pack on to a bolt more than 2 to 3 threads, either end.

Threads uniform and clean. Plating smooth and clean

they are good connectors

There’s not really much to say, other than they are as described and they are the cheapest to buy, that I can find. I have bought these twice for two different projects and like to keep a few on hand.

just what i needed

quick service i make adjust knobs