Key-Locking Thread Insert,thin wall , steel 1215/ 3/8-16x.375 (1/4-20UNC) 5 pcs $14.70Save up to 13% when you buy more
Key-Locking Thread Insert,heavy duty, steel 1215/ 7/16-14x.375 (1-4-20UNC) 5 pcs $13.30Save up to 13% when you buy more