Recoil Wire Inserts Coiled Wire Inserts of All Types The Recoil® inserts can be manufactured from a variety of materials including Type 304 (18-8) stainless steel wire cold rolled into a diamond shaped cross section. Inco......Recoil Wire Inserts Coiled Wire Inserts of All Types The Recoil® inserts can be manufactured from a variety of materials including Type 304 (18-8) stainless steel wire cold rolled into a diamond shaped cross section. Inconel Nimonic 90 Nitronic 60 PhosphorBronze and Type 316 stainless steel. Recoil inserts are available in either standard free running form or screw lock type which provides an internal locking feature. Inserts are manufactured for every thread form including UNC,UNF, BSC,BSW, BSP, BSF, BA,NPT and ISO Metric thread sizes.