Skip to content
info@engineeringhardware.com
WhatsApp
Request a Quote
Washers · GB/T 4622 / ASME B16.20 · Application guide

What Are Spiral-Wound Metal Gasket Used For?

Typical applications, the industries that specify spiral-wound metal gasket, and how to choose the right size, material and finish for the joint.

Spiral-Wound Metal Gaskets are used for load distribution and anti-loosening under a bolt or nut. They are manufactured to GB/T 4622 / ASME B16.20, and selection is driven by the size designation, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Load distribution and anti-loosening under a bolt or nut
Governing standard
GB/T 4622 / ASME B16.20
Size designation range
15 to 150
Category
Washers

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

What Are Spiral-Wound Metal Gasket Used For? application image

Application guide for Spiral-Wound Metal Gaskets to GB/T 4622 / ASME B16.20. The core duty of the type is load distribution and anti-loosening under a bolt or nut. The typical industries, the how-to-specify checklist, assembly practice and the exclusion cases are set out below. Stocked across roughly 15 to 150, they cover heavy and structural work.

Typical Applications for Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090)

The most common settings where these are specified:

  • Timber & soft materials: large-OD types that prevent pull-through.
  • 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.
  • Bolted structural joints: spreading load over soft or oversized holes and protecting the surface.

How to Specify Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090) for Your Application

  • Size: Match the nominal size to the mating thread or hole. This product spans 15–150; 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 GB/T 4622 / ASME B16.20. 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 Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090)

  • 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 Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090) 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.

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 (GB/T 4622 / ASME B16.20)

Nominal pipe sizeInner diameter d1 (mm)Outer diameter d2 (mm)Thickness t (mm)Winding materialReference standard
DN1522424.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN2027494.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN2534594.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN3243694.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN4049754.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN5061874.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN65771094.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN80891214.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN1001151494.5304SS + flexible graphiteGB/T 4622 / ASME B16.20
DN1501692054.5304SS + flexible graphiteGB/T 4622 / ASME B16.20

Video: What Are Spiral-Wound Metal Gasket Used For? in use

Video: What Are Spiral-Wound Metal Gasket Used For? in use

Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.

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

Are Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090) made to a recognized standard?

Yes — they are manufactured to GB/T 4622 / ASME B16.20, so dimensions are interchangeable between suppliers when you quote the standard on your order.

What are Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090) used for?

Load distribution and anti-loosening under a bolt or nut. They are supplied to GB/T 4622 / ASME B16.20.

Which industries use Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090)?

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

How do I choose the right size of Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090)?

Match the nominal size to the mating thread or hole. This product is available from 15 to 150; the full dimension table on this page lists each size.

Can I get a quote for Spiral-Wound Metal Gasket — GB/T 4622 / ASME B16.20 (Series 090) 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.