Kolvoii 61-Piece Thread Chaser Set — Metric, UNC & UNF Kit with Color-Coded Taps/Dies and Pitch Gauges

Kolvoii's 61-piece thread chaser set is a complete metric, UNC and UNF thread-restoring kit designed to quickly clean, repair and revive worn or corroded threads on automotive, plumbing and industrial parts.

This compact, organized kit brings together 28 thread chaser taps, 28 matching dies, three profile files and two pitch gauges in a rugged blow-molded case. Color coding (silver for UNC, black for UNF, gold for metric) and hex-shaped tools make it fast to identify the right size, while heat-treated carbon steel construction and protective finishes improve durability in the shop or on the road.

Which thread standards and sizes are included?

The set covers both SAE/imperial and metric thread standards commonly used on engines, fittings and fasteners. You get UNC and UNF sizes for imperial work plus a wide span of metric pitches, so you can match the original specification before rethreading.

• UNC (silver): 5/8”-11, 9/16”-12, 1/2”-13, 7/16”-14, 3/8”-16, 5/16”-18, 1/4”-20
• UNF (black): 5/8”-18, 9/16”-18, 1/2”-20, 7/16”-20, 3/8”-24, 5/16”-24, 1/4”-28
• Metric (gold): M6–M14 with common pitches, including M6-1.0/1.25 through M14-1.50

How does this kit make thread repair easier for mechanics and DIYers?

Color-coding and hex-shaped taps/dies allow quick selection and enable use with standard wrenches or sockets. The included pitch gauges and three profile files let you identify, clean and correct thread form before cutting, reducing cross-threading and speeding repeatable repairs.

• Pitch gauges for fast thread identification
• Three file profiles to reshape and clear damaged root and crest areas
• Hex taps/dies fit common tools — no special holders required

What materials and finishes are used for longevity?

Each tap, die and file is forged from heat-treated carbon steel to hold cutting edges under repeated use. Pieces receive protective finishes — zinc or black oxide on imperial/UNF parts and gold coding for metric — to improve rust resistance and maintain appearance after storage.

• Heat-treated carbon steel for edge retention
• Protective coatings reduce corrosion in work environments
• Durable molded case prevents tool movement and damage

What jobs and surfaces can this thread chaser set handle?

The kit is intended for thread restoration rather than full-size rethreading—perfect for spark plug holes, bolt threads, fittings and machine parts showing wear, galling, or light corrosion. It’s suitable for automotive, plumbing, agricultural and general maintenance tasks where original thread form must be recovered.

• Spark plug and cylinder head thread touch-ups
• Repairing bolts, studs and suspension component threads
• Cleaning pipe fittings and machinery fastener threads

Who is this for: Kolvoii’s 61-piece thread chaser set is built for professional mechanics, machinists, plumbers and serious DIYers who need a portable, full-range thread repair solution. If you frequently work on engines, industrial equipment or household fixtures and want a single kit that identifies pitches and restores threads without specialized machines, this organized set covers common metric and imperial sizes while remaining durable enough for regular shop use.