G 3/8" x 19 HSS-Co Machine Pipe Tap Form C 40° Right-Hand 12mm Shank, Blind Hole ISO 228 - TECWERK

Take advantage of a combination of high-temperature performance and precise thread form: the HSS‑Co construction and ground flanks ensure consistent results when producing Whitworth pipe threads in demanding materials. Order the tool directly via Metav Werkzeuge or consult their specialists for application guidance.

Machine tap DIN 5156C G 3/8" x 19, HSS‑Co (TECWERK) — right‑hand spiral, form C

The machine tap DIN 5156C G 3/8" x 19, HSS‑Co (TECWERK) is a purpose‑built tap for Whitworth pipe threads to ISO 228, optimised for blind‑hole threading and medium‑high strength steels.

• HSS‑Co construction for higher heat resistance
• Right‑hand spiral 40° for efficient chip evacuation
• Ground flanks for precise thread geometry
• Shank Ø 12 mm, Whitworth G 3/8" x 19 tpi

Consistent performance from a high‑temperature alloy

Made from HSS‑Co, the tool offers improved hot hardness compared with conventional high‑speed steels, enabling stable performance at raised cutting temperatures. The cobalt‑alloy composition increases tool life under thermal load and reduces wear in repetitive production runs. For workshops and production sites seeking reliable cutting endurance, this material choice translates into fewer tool changes and more predictable maintenance cycles.

Accurate threads in blind holes with controlled chip flow

The right‑hand spiral 40° geometry directs chips back into the flutes, which is especially beneficial when cutting blind holes where chip evacuation is critical. Combined with ground flanks, the geometry produces a clean flank form and consistent thread profile, reducing the need for rework. These design choices support repeatable results on each workpiece and help maintain thread integrity in through‑hard operations.

Suitable for pipe threads and common engineering materials

Designed for Whitworth pipe thread form G to ISO 228, the tap produces G 3/8" x 19 tpi threads and is intended for applications in steels with strength up to approx. 1000 N/mm² as well as in temper cast iron. The parallel pipe thread form complies with ISO 228 requirements, which means components will assemble correctly where standard pipe fittings are used. This makes the tool appropriate for hydraulic, pneumatic and general mechanical engineering tasks that call for standardised G‑threads.

Workshop compatibility and efficient set‑up

A 12 mm shank ensures compatibility with standard machine collets and holders, permitting quick mounting on CNC tapping spindles or dedicated tapping heads. The tap’s form C classification and robust geometry support machine tapping at stable speeds, helping to streamline production processes. With a clear specification and widely used interface dimensions, integration into existing toolsets is straightforward, reducing set‑up time and simplifying inventory management.

Discuss application requirements with Metav Werkzeuge to confirm suitability for specific materials and machines and to obtain further technical advice; contact info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 2000867512NW
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Shank diameter: 12 mm
• Thread: G 3/8" x 19 tpi
• Material strength capability: up to approx. 1000 N/mm²

Special features

• Material: HSS‑Co
• Form C, right‑hand spiral 40°
• Flanks ground
• Whitworth pipe thread G to DIN ISO 228
• For blind‑hole threads, suitable for steels and temper cast iron

FAQ

What thread standard does the tap produce?
The tool produces Whitworth pipe threads G to ISO 228, specified as G 3/8" x 19 tpi for item 2000867512NW.

Which materials can be machined with this tap?
The tap is specified for steels up to approximately 1000 N/mm² and for temper cast iron, as stated in the product information.

Is this geometry suitable for blind‑hole threading?
Yes — the right‑hand spiral 40° and flanks ground geometry are optimised for blind‑hole threading to aid chip evacuation and thread quality.

What is the shank size and how is it mounted?
The shank diameter is 12 mm, compatible with standard machine collets and holders for machine tapping spindles.

What are the key material and form characteristics of the tool?
Constructed from HSS‑Co in form C, the tap combines cobalt‑enhanced hot hardness with a spiral flute and ground flanks for precise thread generation.

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