3/8" G x 19 TPI Machine Tap HSS-Co Form B Straight Flute Back-Tapered Flanks For Through Holes - TECWERK

Combine the durability of HSS‑Co with a thread geometry that meets DIN ISO 228, and benefit from a 12 mm shank for secure machine mounting; order the machine tap directly via Metav Werkzeuge or consult our specialists for application advice.

Machine tap DIN 5156B G 3/8 in x 19 HSS‑Co ISO 228 – TECWERK

A TECWERK machine tap designed for Whitworth (G) parallel pipe threads, offering straight flutes and relieved flanks for through-thread tapping in medium‑strength steels

• HSS‑Co for increased heat resistance and tool life
• Straight flutes with relieved flanks for reliable chip control
• Conforms to DIN ISO 228 for Whitworth (G) parallel threads
• Shank diameter 12 mm for secure clamping

High‑precision pipe threads that keep production moving

The Machine tap DIN 5156B G 3/8 in x 19 HSS‑Co ISO 228 TECWERK delivers consistent Whitworth (G) thread form in line with DIN ISO 228, ensuring interchangeability and leak‑tight assembly where parallel pipe threads are required. The combination of HSS‑Co grade and the specified geometry produces repeatable results in series production, reducing rework and downtime. By standardising on a tap that matches industrial thread norms, process reliability and inspection routines become simpler and less time‑consuming.

Robust cutting geometry for cleaner chips and longer service life

The tool’s Form B geometry with straight flutes and relieved flanks is engineered to balance cutting performance and chip evacuation when producing through threads. Straight flutes facilitate axial chip flow, which is advantageous in pipe threading where chips must not compact in the bore. The cobalt‑alloyed high‑speed steel provides higher red hardness than conventional HSS, which improves wear resistance under elevated temperatures. The 12 mm shank secures the tool in collets or holders and reduces run‑out, supporting precise thread profiles and extended tool life.

Application scope and practical handling notes

This tap is specified for use in steels up to ca. 1000 N/mm² tensile strength and in malleable cast iron, making it suitable for common workshop and industrial tasks that involve mechanical pipe connections. It is intended for through-thread applications and should be used with appropriate cutting fluid and controlled feed to maintain thread quality. For machines with compatible toolholders and sufficient rigidity, the tool offers dependable throughput; routine inspection and replacement according to wear criteria will preserve thread accuracy and component fit.

Contact Metav Werkzeuge for tailored advice on integrating this TECWERK machine tap into production processes or to discuss quantity and delivery from our Emmerich stock – eMail info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 2000867502NW
• Product: Machine tap DIN 5156B G 3/8 in x 19 HSS‑Co ISO 228 TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Shank Ø: 12 mm
• Thread specification: G 3/8 (Whitworth pipe thread) to DIN ISO 228
• Gg/1″: 19

Special features

• Material: cobalt high‑speed steel (HSS‑Co)
• Form B
• Straight flutes with flanks relieved (flank grinding)
• For through threads
• Suitable for steels up to ca. 1000 N/mm² and temper cast iron

FAQ

What materials is this tap suitable for?
The Machine tap DIN 5156B G 3/8 in x 19 HSS‑Co ISO 228 (TECWERK, SKU 2000867502NW) is specified for steels up to ca. 1000 N/mm² tensile strength and for temper cast iron.

Which thread standard does the tap produce?
The tool produces a Whitworth (G) parallel pipe thread in accordance with DIN ISO 228, suitable for standardised pipe fittings.

What does HSS‑Co mean and why is it used here?
HSS‑Co signifies cobalt‑alloyed high‑speed steel; the alloy increases red hardness and wear resistance, which benefits the tap when cutting at higher temperatures or under continuous production.

Is this tap intended for through threads or blind holes?
The design and flute geometry are intended primarily for through‑thread tapping, where chip evacuation along the flute is required.

What machine requirements should be considered before use?
A rigid tapping setup and a matching collet or holder for the 12 mm shank are recommended to minimise run‑out and achieve accurate thread profiles.

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