General description Recoil Inserts Sparkplug M14.0 - 1.25 Pitch x 3/8in includes 10 inserts designed for quick and easy repair of damaged threads or for creating stronger original threads in alloys and composite materials. These inserts are ideal for original equipment manufacture. Technical specifications Size: 14mm x 1.25 Length: 9.5mm (3/8 in) Material: Corrosion resistant stainless steel Usage Repair damaged threads Create stronger threads in various materials Facilitate changeover from unified to metric threads or vice versa Reduce thread wear