1/4" x 19 TPI Machine Pipe Tap HSS-Co Form C Vapourised Green Ring Right-Hand 40° Undercut Flanks for Blind Threads DIN ISO 228 11mm Shank - TECWERK

Combine the high wear resistance of HSS‑Co with precise Whitworth pipe threading and a 40° right‑hand spiral to achieve consistent, clean threads in blind holes; order the tool easily through Metav Werkzeuge or consult our advisors for application guidance.

Machine tap DIN 5156C — Whitworth pipe thread G 1/4" × 19, HSS‑Co (TECWERK)

The Machine tap DIN 5156C is a universal threading tool designed for producing Whitworth pipe threads to DIN ISO 228 in blind holes, suitable for a wide range of steels and non‑ferrous materials.

• HSS‑Co cobalt high‑speed steel construction
• Whitworth pipe thread G 1/4", 19 tpi
• Vapourised finish with green ring marking
• 40° right‑hand spiral, flank‑ground for blind holes

Consistent pipe-thread quality for production use

Manufactured in HSS‑Co (cobalt high‑speed steel) and built to Form C (universal) geometry, this threading tool delivers stable cutting performance and extended service life in intermittent and continuous work. The tap is designed to machine Whitworth pipe thread G 1/4" to DIN ISO 228, a standardised form that reduces rejection rates and simplifies inspection in serial production. By combining robust material choice with standard conformity, the tool reduces downtime from frequent replacements and supports reproducible results across batches.

Faster cycles and improved chip control for blind holes

A 40° right‑hand spiral combined with flank‑ground flutes promotes controlled chip formation and smooth evacuation when working in blind holes, lowering the risk of chip packing and thread damage. The vapourised finish adds surface resilience and eases chip flow, which contributes to faster cycle times and fewer rejected parts. Explained simply, the spiral helix guides swarf away from the cutting edge so tapping requires fewer retracts and less manual cleaning—clear efficiency gains in workshop and production settings.

Versatile machining across common workshop materials

The tool is rated for machining steel, stainless steels, spheroidal graphite cast iron and non‑ferrous metals, making it a flexible choice for maintenance departments and job shops. The shank diameter of 11 mm ensures secure clamping in standard holders and reduces run‑out, supporting precise thread form even under moderate spindle speeds. Where material variability is a concern, the universal geometry and cobalt alloy composition provide both toughness and hardness to tolerate varied cutting conditions without frequent tool changes.

Standard compliance and reduced rework risk

Conformity to DIN ISO 228 and the use of the Whitworth pipe thread form ensure compatibility with existing fittings and piping systems, cutting inspection time and eliminating trial‑and‑error adjustments. The green ring marking and vapourised treatment serve as quick visual identifiers for tool selection on the trolley, while the universal specification and HSS‑Co construction offer a balanced compromise between cutting performance and robustness. For operations focused on repeatability and minimising scrap, these characteristics support a predictable production flow.

Choose TECWERK’s machine tap for reliable, standardised pipe threading and contact Metav Werkzeuge for application advice and fast supply from Emmerich — eMail: info@metav-werkzeuge.com | Tel: +49 2822 7131930

Technical Data

• Article number: 2000867954NW
• Brand: TECWERK
• Packaging unit: 1
• UID: 2000867954NW

Facts

• Size: G 1/4" (Whitworth pipe thread)
• Thread count: 19 tpi
• Shank diameter: 11 mm
• Spiral helix angle: 40°

Special features

• Material: HSS‑Co (cobalt high‑speed steel)
• Form: C (universal)
• Finish: vapourised, green ring marking
• Flute/geometry: flank‑ground
• Direction: right‑hand spiral
• Thread standard: DIN ISO 228 (Whitworth pipe thread)
• Application: for blind holes
• Suitable materials: steel, stainless steels, spheroidal cast iron, non‑ferrous metals

FAQ

What thread form and standard does this tap produce?
The tap produces Whitworth pipe thread G 1/4" to DIN ISO 228, ensuring compatibility with standard BSPP fittings and assemblies.

Is the tool suitable for stainless steel and cast iron?
Yes, the HSS‑Co construction and universal form make the tap suitable for stainless steels and spheroidal graphite cast iron as well as other non‑ferrous metals.

How does the 40° spiral help when tapping blind holes?
The 40° right‑hand spiral promotes chip evacuation into the flutes, reducing the risk of chip compacting at the thread root in blind holes and improving surface finish.

What shank size is required for mounting the tap?
The tap has a shank diameter of 11 mm, compatible with standard collets and holders that accept this shank size.

Is the finish of the tool treated for improved wear resistance?
The tool features a vapourised finish and green ring marking, which enhance surface durability and help with quick tool identification.

Manufacturer/Responsible: NORDWEST Handel AG, Robert‑Schuman‑Straße 17, 44263 Dortmund