What is a machine nut tap?

A machine nut tap is a special tap used to cut threads in nuts efficiently. It features a long reduced shank that allows several nuts to run over after cutting, enabling continuous threading in serial production.

What does DIN 357 specify?

DIN 357 defines the geometry, dimensions, and tolerances of machine nut taps. It specifies their long shank design, suitable for through threads and production use in nuts.

Which materials can be tapped?

Suitable for non-abrasive materials and unalloyed or low-alloyed steels up to 800 N/mm². Always use cutting oil or coolant for best tool life.

Why use a long reduced shank?

The long shank lets multiple nuts slide over after tapping, allowing fast, continuous work – ideal for series production and confined areas.

Can it be used manually?

Yes. The tap can be used with a hand tap wrench or a suitable machine tap collet with a 2.1 mm square drive.

What is a machine nut tap?

A machine nut tap is a special tap used to cut threads in nuts efficiently. It features a long reduced shank that allows several nuts to run over after cutting, enabling continuous threading in serial production.

What does DIN 357 specify?

DIN 357 defines the geometry, dimensions, and tolerances of machine nut taps. It specifies their long shank design, suitable for through threads and production use in nuts.

Which materials can be tapped?

Suitable for non-abrasive materials and unalloyed or low-alloyed steels up to 800 N/mm². Always use cutting oil or coolant for best tool life.

Why use a long reduced shank?

The long shank lets multiple nuts slide over after tapping, allowing fast, continuous work – ideal for series production and confined areas.

Can it be used manually?

Yes. The tap can be used with a hand tap wrench or a suitable machine tap collet with a 2.1 mm square drive.

HSSE machine nut tap M 20 x 2.5 DIN 357 for metric fine threads.

Technical drawing of a VÖLKEL thread tap with labeled diameters and lengths.

Machine Nut Taps

Machine Nut Tap DIN 357 HSSE - M 4 x 0.7

Name: VÖLKEL Machine Nut Tap DIN 357 HSSE – M 4 × 0.7
Brand: VÖLKEL
SKU: 37130
Availability: InStock

Item no. 37130

€17.00

in stock - more than 100 pieces available

VÖLKEL delivers exclusively to specialized dealers. Online you can buy VÖLKEL products here.

The prices are in Euro plus VAT and shipping, insurance and packaging costs.

Application

VÖLKEL Machine Nut Tap DIN 357 HSSE – M 4 × 0.7

The VÖLKEL Machine Nut Tap DIN 357 is your go-to tool for serial nut tapping and precision through threads. Designed with a long reduced shank, this tap allows multiple finished nuts to slide over after threading – ensuring efficient, continuous operation in production or workshop use.

Made from high-performance HSSE steel, it combines toughness and wear resistance for cutting unalloyed and low-alloy steels up to 800 N/mm². Whether you’re working in confined spaces or processing batches of nuts, this tap offers consistent results, excellent chip evacuation, and long tool life.

Applications & Advantages

Long reduced shank allows several nuts to run over – perfect for serial production
For through threads and difficult-to-reach areas
HSSE ensures durability and precision cutting
For non-abrasive materials up to 800 N/mm²
Ideal for unalloyed and low-alloyed steels
Manufactured according to DIN 357 for consistent quality

Technical Details

Thread type	Metric ISO thread DIN 13
Standard	DIN 357
Material	HSSE
Tolerance	ISO 2 / 6H
Nominal size	M 4 × 0.7
Overall length (L1)	90 mm
Thread length (L2)	25 mm
Shank diameter (D2)	2.8 mm
Square drive	2.1 mm
EAN	4022835371304
Article number	37130

Step-by-Step Instructions

Preparation: Secure the nut, clean the pre-drilled hole, and apply cutting oil.
Alignment: Align the tap perfectly perpendicular to the workpiece.
Tapping: Apply steady feed and use moderate speed for clean threading.
Serial work: Let the finished nut slide over the long shank and continue with the next one.
Inspection: Deburr, clean, and check thread quality with a GO/NO-GO gauge.

FAQ

What makes a machine nut tap special?
Its long reduced shank design allows serial nut tapping – ideal for continuous production and efficient workflow.

What does DIN 357 define?
It defines geometry, dimensions, and tolerances of nut taps used for through threads, ensuring interchangeability and process reliability.

What materials can it cut?
Best suited for non-abrasive materials and steels up to 800 N/mm². Avoid using on hardened steels.

Can I use it manually?
Yes, with a suitable hand tap wrench or a 2.1 mm square drive collet. For precision or volume work, a machine setup is recommended.

Why choose HSSE material?
HSSE offers superior toughness and wear resistance compared to HSS, ensuring long tool life and consistent performance.

Learn more about DIN 357 machine nut taps and compatible tooling – contact us via the contact form.

Additional information

Type of thread	metric ISO-thread
Standard	DIN 357
Material	HSSE
Tolerance	ISO2 (6H)
Size	M 4 x 0.7
Overall length (L1)	90 mm
Thread length (L2)	25 mm
Core hole diameter (D1)	3.3 mm
Shank diameter (D2)	2.8 mm
Drive connector	2.1 mm
EAN	4022835371304
Item number	37130
Type of flute	straight fluted
Application	for through holes
Thread standard	DIN 13