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Silver steel M18x1.5 bottoming tap with four straight flutes and bright finish

Westward

Westward M18x1.5 Bottoming Tap 4 Flutes HSS D7

SKU CH-Z0N4-F4QYS

An M18 × 1.5 metric fine bottoming tap with four straight flutes in D7 high-speed steel

  • Product typeHole, Drill, Bore & Wire Gauges
  • Bottoming design cuts full threads to hole bottom
  • Metric fine M18 × 1.5 pitch suits precision fits
  • High-speed steel body resists wear in tough materials
  • Four straight flutes clear chips for smoother cutting
  • D7 limit class ensures tight thread tolerance control

Threading Tool Purpose

The Westward M18x1.5 bottoming tap cuts internal threads in through-holes or blind holes. Machinists and maintenance technicians use it to produce metric fine threads to a D7 limit with a right-hand orientation. The high-speed steel construction suits general-purpose threading in steel and non-ferrous metals. It is not suited for buyers who need a taper or plug chamfer for starting threads in difficult materials.

Sustained Cutting Behaviour

The straight flute design evacuates chips ahead of the tap during each rotation. Under continuous hand or machine tapping the uncoated bright finish relies on cutting fluid to manage heat and friction. The 4-flute geometry distributes load evenly across the cutting edges. It is not suited for operators who require spiral-point or spiral-flute taps for deep blind holes without chip packing.

Build Quality and Daily Use

The overall length measures 4 1/32 in with a thread length of 1 13/16 in, providing reach for standard set-ups. High-speed steel retains hardness during repeated sharpening cycles. The D7 thread limit ensures a precise class of fit for metric fine assemblies. It is not suited for users who need a coated tap for extended tool life in abrasive or high-temperature alloys.

How it compares

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

Price $17.99
Cheaper than about 62% of the 2,474 comparable items (median $23.99).

Specifications

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

Questions about this item

Does the HSS material and bright finish on this M18x1.5 tap generate excessive heat during prolonged threading operations?

High-speed steel construction and the uncoated bright finish dissipate heat effectively during extended use with proper cutting fluid.

What size tap wrench or handle is required to turn the 4 1/32 inch overall length shank?

A standard tap wrench sized for the M18 shank diameter is needed; the square drive fits common adjustable handles.

Will the D7 thread limit and 1 13/16 inch thread length cut correctly in an existing M18x1.5 hole?

The D7 limit provides a standard fit for metric fine threads, and the thread length suits typical through-hole depths.

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