Thread Restorer Files Thread Chaser File Thread Repair Tool for Engineering Home Projects Made of 45 carbon steel with a quenched and blackened surface, ensuring its high hardness, durability, corrosion resistance and wear resistance, greatly extending its service life.Equipped with a detachable handle rubber cover, it can be held easily without hurting your hands and can maintain a comfortable grip after long-term use.Adopt a double-head design with various specifications, which can meet different needs.During use, file repeatedly along the direction of the thread until the deformed part is removed. After the deformed part is removed, the nut can be reused.Suitable for quickly restoring the crushed threads of machinery, motor vehicle and other machinery. Can be used to repair rusted fasteners on studs, bolts, screws, pipes and fittings. Size: 12/13/14/16/18/20/24/28 SAE/UN11/12/14/16/18/20/22/26 BSW/BSF11/12/14/16/19/20/22/28 PF/BSP0.75/1/1.25/1.5/1.75/2/2.5/3 Metric Click Here Click Here Click Here Click Here Click Here Add to Cart Buying Options Add to Cart Add to Cart Buying Options Price $13.99$13.99 — $13.99$13.99 $23.99$23.99 — Size 0.75/1/1.25/1.5/1.75/2/2.5/3 Metric 12/13/14/16/18/20/24/28 SAE/UN 11/12/14/16/18/20/22/26 BSW/BSF 11/12/14/16/19/20/22/28 PF/BSP 12/13/14/16/18/20/24/28 SAE/UN