Thread-Locking Insert 1/4"-20 Inside, 3/8"-16 Outside

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These inserts reduce at 3/8"-16 threaded hole to a 1/4"-20 threaded hole. Use them to bolt two 1-2-3 blocks together. Use them to reduce the hole in 7/16" or 1/2" T-slot nuts to 1/ 4"-20 thread.These inserts use Loctite® adhesive to keep them in place. The adhesive reaches full strength after 72 hours.Set the insert with a bolt and two nuts, or use a slotted screwdriver. Show more