UNC 1/4" 5/16" 3/8" 1/2" Helicoil Thread Inserts Wire Insert Thread Repair 304SS

Thread Type：UNC. Internal Thread Size：1/4-20，5/16-18，3/8-16，1/2-13. If you encounter any problems with your order, we are here to help. Material: 304 Stainless Steel.

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