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Recoil helically wound wire thread inserts can be used to strengthen threads, giving applications a longer life. Each insert shares the load over the entire bolt and hole, improving holding or pull-out resistance, providing a more even distribution of load and stress. Recoil inserts are generally made of type 304(18-8) stainless steel wire rolled into a diamond shape cross-section. Features & Benefits • Lightweight robust design gives superior holding power • Easy installation process Specifications • Thread Diameter and Length: 4 UNC x 2.0D • Pitch: 40TPI • Quantity: Pack of 10