166 Piece Metric Helicoil Thread Repair Kit with HSS Drill Bits and Stainless Steel Inserts

Restore stripped or worn threads with this helicoil thread repair kit designed for automotive repair, machining, and equipment maintenance. The 166-piece set covers M5, M6, M8, M10, and M12 thread sizes and includes the tools needed to drill, tap, install inserts, and break off tangs. HSS drill bits and taps are heat-treated to HRC 50–60, while the stainless steel thread inserts are made from 304 stainless steel for dependable durability. A rubber-coated installation tool provides a secure, comfortable grip during use. Everything stores neatly in the included carrying case for convenient transport and organization.

Key Features

• 166-Piece Set — Provides tools and inserts for common metric thread repairs.
• Five Metric Sizes — Supports M5, M6, M8, M10, and M12 applications.
• Heat-Treated HSS Tools — Drill bits and taps rated HRC 50–60 for durable use.
• 304 Stainless Steel Inserts — Designed to restore stripped, damaged, or worn threads.
• Simple Repair Process — Drill, tap, install the coil, and break the tang.
• Carrying Case — Keeps tools organized and easier to transport between jobs.

Specifications

• Main Material: HSS
• Thread Insert Material: 304 stainless steel
• Available Sizes: M5, M6, M8, M10, M12
• Color: Red and black
• Quantity: 166 pieces
• Drill Sizes: 0.2 in (5.2 mm), 0.2 in (6.3 mm), 0.3 in (8.3 mm), 0.4 in (10.5 mm), 0.5 in (12.5 mm)
• Tap Sizes: M5 x 0.8, M6 x 1.0, M8 x 1.25, M10 x 1.5, M12 x 1.75

Why Choose Our 166 Piece Metric Helicoil Thread Repair Kit with HSS Drill Bits and Stainless Steel Inserts

This metric thread repair kit combines five commonly used metric sizes with durable repair tools and stainless steel inserts in one organized set. Its complete drill-to-insert workflow makes thread restoration practical for routine maintenance and repair work.

Perfect For

Suitable for mechanics, automotive repair workers, DIY users, machining tasks, and equipment maintenance involving aluminum, iron, carbon steel, bronze, magnesium, and other supported materials.

Restore Damaged Threads with Confidence

Keep essential rethreading tools organized and ready for repairing worn, stripped, or damaged metric threads whenever the job calls for them.