We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Straight flute hand tap M10-1.00 bright finish four flutes

Helicoil

Helicoil 4984-10 M10-1.00 Straight Flute Hand Tap

SKU CH-WZM8-4WR1C

M10x1 metric fine STI tap with 80 mm overall length, 36 mm thread length, four flutes and plug chamfer in high-speed steel

  • Product typeHole, Drill, Bore & Wire Gauges
  • M10x1.00 metric fine thread for precise repairs
  • High-speed steel construction resists wear during tapping
  • 00 mm overall length reaches deep holes
  • Plug chamfer starts threads easily in through-holes
  • Four flutes clear chips efficiently for clean cuts

Thread Repair Tap M10x1.00

The Helicoil 4984-10 is a straight flute hand tap designed to cut internal threads for screw thread inserts in M10x1.00 metric fine holes. It is made from high speed steel with a bright uncoated finish and features four flutes and a plug chamfer for starting threads in through or blind holes.

For Thread Insert Preparation

This tap suits technicians and engineers who need to prepare holes for Helicoil STI inserts in M10x1.00 sizes. It is not for cutting standard M10 coarse threads or for applications requiring coated or spiral point taps for improved chip evacuation.

STI Thread Limit D10

The tap is manufactured to thread limit D10, which determines the pitch diameter tolerance of the internal thread produced. This single specification decides whether the tap will create the correct class of fit for the matching Helicoil insert.

How it compares

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

Price $24.99
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 tap handle or wrench size do I need to turn the 4984-10 hand tap?

The tap has a square shank sized for a standard M10 tap wrench; use a wrench that fits the shank to apply even torque while cutting the M10x1.00 thread.

Can I run this HELI-COIL tap through a hole that was previously threaded with a standard M10 coarse tap?

No — the tap cuts an M10x1.00 fine thread for screw-thread inserts, which has a different pitch diameter than a standard M10 coarse thread; the existing hole must be drilled to the correct STI tap drill size before using this tool.

How do I verify the 4984-10 tap is producing the correct thread after setup?

Check the thread with an M10x1.00 STI go/no-go gauge; the go gauge should pass fully and the no-go gauge should stop within three turns, confirming the D10 limit and 36.00 mm thread length are within spec.

More in Utility & Specialty Hand Tools

Similar items