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Bright uncoated steel straight flute hand tap with four flutes and plug chamfer

Helicoil

Helicoil 6CPB Straight Flute Hand Tap 3/8"-16 UNC Plug 4 Flutes

SKU CH-WG7Q-Q0V9Z

A straight-flute hand tap cuts 3/8"-16 UNC threads with a plug chamfer and four flutes

  • Product typeHole, Drill, Bore & Wire Gauges
  • High-speed steel construction resists wear
  • Plug chamfer starts threads cleanly in through-holes
  • Four flutes evacuate chips efficiently
  • UNC 3/8"-16 thread size matches standard coarse pitch
  • Right-hand cutting direction suits conventional tapping operations

Thread Repair Tap for 3/8"-16 UNC Holes

This HELI-COIL straight flute hand tap creates internal threads sized for 3/8"-16 UNC screw thread inserts. The plug chamfer and four-flute design suit through-hole and blind-hole work in general-purpose materials. It is intended for mechanics and maintenance technicians who need to restore damaged threads to a standard size.

Verify Hole Size and Material Compatibility

Before ordering, confirm the existing hole matches the required tap drill diameter for a 3/8"-16 UNC STI tap. The high-speed steel construction with a bright uncoated finish performs best in ferrous and non-ferrous metals; it is not suited for hardened steels or abrasive composites. Right-hand cutting direction must match the application.

Fits Standard Tap Wrenches and Frees Damaged Threads

The 3 3/8 inch overall length and 1 21/32 inch thread length engage standard tap holders without special adapters. The H3 thread limit produces a class 2B fit for HELI-COIL inserts, letting you salvage stripped or worn holes without replacing the parent component. Four flutes provide balanced chip evacuation in typical workshop conditions.

How it compares

Measured against everything we stock in Utility & Specialty Hand Tools, at today’s prices. Recalculated every night.

Price $22.99
Typical for this category: the median of 2,474 items is $23.99.

Specifications

Product
Brand nameHelicoil
Product typeHole, Drill, Bore & Wire Gauges

Questions about this item

What comes in the box and what must be purchased separately?

The box contains the straight-flute hand tap only; a matching drill bit, tap wrench and cutting fluid are not included.

Which thread size and pitch should I select for a 3/8"-16 UNC hole?

Choose the 3/8"-16 UNC version — it matches the stated thread size and pitch exactly.

What does the 3 3/8 in overall length mean when the tap is in the machine?

The 3 3/8 in overall length is the total tool length from shank end to tip when mounted in the holder.

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