M7 Coarse Thread Repair Tool Set

A compact, field-proven M7x1.0mm thread repair system comprising five core components: high-speed steel drill bit (6.1 mm), M7x1.0mm tap, coiled stainless steel insert, spring-assisted applicator, and hardened lug breaking tool. Total kit volume: 85 cm³; packaged in recyclable rigid cardboard with foam insert. Insert material: austenitic 304 stainless steel (annealed); tap hardness: 63–65 HRC; drill bit hardness: 62–64 HRC. Validated for use on EN8 steel, GG25 cast iron, and EN AW-6060 aluminium—provides full thread strength recovery without substrate modification or heat treatment.