This 166-piece metric helicoil thread repair kit restores stripped, worn, or damaged threads in five common sizes of M5, M6, M8, M10, and M12, and stocks 145 thread inserts for high-volume engine and automotive repairs. Each fix follows four steps: drill out the damaged hole, tap the new thread, thread in the coil, and snap off the tang with the breaking pin tools, using the rubber-coated insertion tool for a steady grip. The inserts are wound from high-strength 304 stainless steel, while the twist drills of 5.2 mm, 6.3 mm, 8.3 mm, 10.5 mm, and 12.5 mm and taps of M5x0.8, M6x1.0, M8x1.25, M10x1.5, and M12x1.75 are heat treated to a 50 to 60 HRC hardness for repeated repairs in aluminum, iron, carbon steel, bronze, and magnesium. The kit's inserts, drills, taps, breaking pin tools, installation tools, and hex key stow in a portable carry case that keeps everything organized between jobs.
Metric Thread Repair M5 to M12: This 166-piece helicoil kit restores stripped or worn metric threads in five sizes M5 M6 M8 M10 and M12 with 145 thread inserts on hand for high-volume repairs
304 Stainless Inserts and HRC50-60 Tools: The thread inserts are wound from high-strength 304 stainless steel while the twist drills and taps are heat treated to 50 to 60 HRC for repeated repairs
Four-Step Drill Tap Insert and Break: Restore a thread by drilling out the damaged hole tapping the new thread threading in the coil and snapping off the tang with the included breaking pin tools
Fixes Threads in Many Metals: The kit repairs stripped threads in aluminum iron carbon steel bronze and magnesium making it suited to engine repair automotive service and equipment maintenance
Complete Kit in Carry Case: Includes 145 thread inserts 5 twist drills sized 5.2 mm to 12.5 mm 5 taps 5 breaking pin tools 5 installation tools and 1 hex key organized in a portable carry case
