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Washers · DIN 6319 G · Application guide

What Are Conical Seat Washers, Type G Used For?

Typical applications, the industries that specify conical seat washers, type g, and how to choose the right size, material and finish for the joint.

Conical Seat Washers, Type G are used for a conical seat washer type G paired with a spherical washer to take up angular misalignment. They are manufactured to DIN 6319 G, and selection is driven by the nominal bolt size, the fit and tolerance the assembly requires, and the service environment.

Primary duty
A conical seat washer type G paired with a spherical washer to take up angular misalignment
Governing standard
DIN 6319 G
Nominal bolt size range
M6 to M30
Category
Washers

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

What Are Conical Seat Washers, Type G Used For? application image

Conical Seat Washers, Type G are selected when an assembly calls for a conical seat washer type G paired with a spherical washer to take up angular misalignment. This application guide to the DIN 6319 G type covers concrete end-uses, the specification checklist, correct installation, and where an alternative fastener performs better. Stocked across roughly M6 to M30, they cover general to heavy-duty work.

Typical Applications for Conical Seat Washers, Type G

The most common settings where these are specified:

  • Machine tools: clamping on uneven surfaces.
  • Fixtures: angled clamping.
  • Presses: alignment compensation.
  • Heavy machinery: misaligned mounting.

How to Specify Conical Seat Washers, Type G for Your Application

  • Size: Match the nominal size to the mating thread or hole. This product spans M6–M30; check the full table below for the exact dimensions of each size.
  • Type & OD: Select flat for load spreading, spring/serrated for anti-loosening, or fender/large-OD for soft or oversized holes.
  • 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 6319 G. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

  • Place the washer under the rotating element (usually the nut) so tightening does not score the surface.
  • Chamfered-hole side of a hardened washer faces the bolt head fillet.
  • On serrated-flange hardware, do not add a plain washer — it defeats the serrations.

Common Selection Mistakes with Conical Seat Washers, Type G

  • Relying on a spring washer for locking on class 8.8+ joints — at high preload it flattens and adds nothing.
  • Choosing an OD too small for soft material, so the head pulls through or embeds.

Where Conical Seat Washers, Type G Are Not the Right Choice

A washer does not replace a locking feature on its own in severe vibration, and a spring washer adds little clamp on high-strength joints.

Custom manufacturing · Made to drawing

Need a conical seat washers, type g outside the standard range?

Bore, outside diameter, thickness, temper and finish are the variables here — there is no thread to specify, so the fit and the bearing area are what the drawing has to pin down. Made by stamping or punching.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

Custom washer manufacturingSend a drawing

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.

Dimensioned line drawing of M6 Conical Seat Washers, Type G to DIN 6319 G. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.
d2 (mm)
7.1
d4 (mm)
17.0
d5 (mm)
11.0
h3 (mm)
4.0
Sends the selected values to the quote form below.

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

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Specification
Business Information

Dimensions & Specifications (DIN 6319 G)

Sized2 (mm)d4 (mm)d5 (mm)h3 (mm)Reference standard
M67.117.011.04.0DIN 6319 G
M89.624.014.55.0DIN 6319 G
M1012.030.018.55.0DIN 6319 G
M1214.236.020.06.0DIN 6319 G
M1416.540.024.86.0DIN 6319 G
M1619.044.026.07.0DIN 6319 G
M2023.250.031.08.0DIN 6319 G
M2428.060.037.010.0DIN 6319 G
M3035.068.049.012.0DIN 6319 G
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

How do I choose the right size of Conical Seat Washers, Type G?

Match the nominal size to the mating thread or hole. This product is available from M6 to M30; the full dimension table on this page lists each size.

Do Conical Seat Washers, Type G actually stop bolts loosening?

Spring and serrated washers help maintain tension under light vibration, but for critical joints a prevailing-torque locking nut or adhesive is more reliable. Flat washers mainly spread load and protect the surface.

What material should Conical Seat Washers, Type G be for outdoor use?

For damp, coastal or chemical environments specify A4 (316) stainless or a suitably coated steel. For indoor or dry use, A2 (304) stainless or zinc-plated steel is normally adequate.

Are Conical Seat Washers, Type G made to a recognized standard?

Yes — they are manufactured to DIN 6319 G, so dimensions are interchangeable between suppliers when you quote the standard on your order.

Can I get a quote for Conical Seat Washers, Type G 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.