Skip to content
info@engineeringhardware.com
WhatsApp
Request a Quote
Tools · DIN 371 / DIN 376 / ISO 529 · Application guide

What Are Machine Taps (DIN 371 / DIN 376) Used For?

Typical applications, the industries that specify machine taps (din 371 / din 376), and how to choose the right size, material and finish for the joint.

Machine Taps (DIN 371 / DIN 376) are used for installing, adjusting or servicing the assembly rather than forming part of it. They are manufactured to DIN 371 / DIN 376 / ISO 529, and selection is driven by the size designation, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Installing, adjusting or servicing the assembly rather than forming part of it
Governing standard
DIN 371 / DIN 376 / ISO 529
Size designation range
DIN 371 shank to DIN 376 shank
Category
Tools

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Machine Taps (DIN 371 / DIN 376) Used For? application image

Application guide for Machine Taps (DIN 371 / DIN 376) to DIN 371 / DIN 376 / ISO 529. The core duty of the type is installing, adjusting or servicing the assembly rather than forming part of it. The typical industries, the how-to-specify checklist, assembly practice and the exclusion cases are set out below. Stocked across roughly 371 to 376, they cover heavy and structural work.

Typical Applications for Machine Taps (DIN 371 / DIN 376)

The most common settings where these are specified:

  • General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.
  • Maintenance & repair (MRO): a stocked size for servicing existing plant where the original fastener spec must be matched.
  • Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.

How to Specify Machine Taps (DIN 371 / DIN 376) for Your Application

  • Size: Select on size designation, and confirm it against the mating feature in the assembly. This product spans 371–376; check the full table below for the exact dimensions of each size.
  • Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to DIN 371 / DIN 376 / ISO 529. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Where Machine Taps (DIN 371 / DIN 376) Are Not the Right Choice

Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure.

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

Request a Quote

The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

Request a Quotation

Specification
Business Information

Dimensions & Specifications (DIN 371 / DIN 376 / ISO 529)

Tap formChip behaviourHole typeSuited to
spiral point (gun nose)pushes chips ahead of the tapthrough holes onlysteel, stainless, general production
spiral flutepulls chips back out of the holeblind holessteel, aluminium, blind tapping
straight flutechips break and collect in the fluteshort through or blind holescast iron, brass, hand and machine use
thread-forming (fluteless)no chips at allthrough or blindaluminium, copper, mild steel, thin sections
DIN 371 shankn/an/aM1 to M10, short shank
DIN 376 shankn/an/aM10 to M30, long shank
Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

What are Machine Taps (DIN 371 / DIN 376) used for?

Installing, adjusting or servicing the assembly rather than forming part of it. They are supplied to DIN 371 / DIN 376 / ISO 529.

Which industries use Machine Taps (DIN 371 / DIN 376)?

They are commonly specified in general machine building, maintenance & repair (mro) and fabrication & metalwork, among other sectors.

How do I choose the right size of Machine Taps (DIN 371 / DIN 376)?

Select on size designation and on the fit the assembly requires. This product is available from 371 to 376; the full dimension table on this page lists each size.

Are Machine Taps (DIN 371 / DIN 376) made to a recognized standard?

Yes — they are manufactured to DIN 371 / DIN 376 / ISO 529, so dimensions are interchangeable between suppliers when you quote the standard on your order.

Can I get a quote for Machine Taps (DIN 371 / DIN 376) in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.