This 338-piece helicoil thread repair kit restores stripped, worn, or damaged threads across five SAE sizes of 1/4 in, 5/16 in, 3/8 in, 7/16 in, and 1/2 in plus five metric sizes of M5, M6, M8, M10, and M12, making it a broad solution for engine and automotive work. Each repair follows four steps: drill out the damaged hole, tap the new thread, thread in the insert, and snap off the tang with the breaking pin tools, with a rubber-coated insertion tool for a comfortable grip. The coil inserts are wound from high-strength 304 stainless steel, while the twist drills and taps are heat treated to a 55 to 62 HRC hardness for durability through repeated repairs in aluminum, iron, carbon steel, bronze, and magnesium. The full set of twist drills, taps, thread inserts, breaking pin tools, installation tools, and a hex key stows in a portable carry case that keeps the kit organized between jobs.
SAE and Metric Thread Repair: This 338-piece helicoil kit restores stripped or worn threads in five SAE sizes 1/4 in 5/16 in 3/8 in 7/16 in and 1/2 in and five metric sizes M5 M6 M8 M10 and M12
304 Stainless Inserts and HRC55-62 Tools: The thread inserts are wound from high-strength 304 stainless steel while the twist drills and taps are heat treated to 55 to 62 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 twist drills taps thread inserts breaking pin tools installation tools with a rubber-coated grip and a hex key all organized in a portable carry case for jobsite transport
