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Washers · Trade series (miniature spring washers) · Application guide

What Are Micro Spring Lock Washers Used For?

Typical applications, the industries that specify micro spring lock washers, and how to choose the right size, material and finish for the joint.

Micro Spring Lock Washers are used for adding a compact spring element under fine-thread hardware where the joint design calls for it. They are manufactured to Trade series (miniature spring washers), and selection is driven by the thread size, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Adding a compact spring element under fine-thread hardware where the joint design calls for it
Governing standard
Trade series (miniature spring washers)
Thread size range
M1.0 to M1.7
Category
Washers

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

What Are Micro Spring Lock Washers Used For? application image

The primary duty of Micro Spring Lock Washers is adding a compact spring element under fine-thread hardware where the joint design calls for it. Below: the sectors that specify them in volume, the checklist used to select the right size and material for the application, installation notes, and the known limits of the type. Stocked across roughly M1 to M1.7, they cover light-duty and instrument-scale work.

Typical Applications for Micro Spring Lock Washers

The most common settings where these are specified:

  • Precision instruments: Miniature spring washers help maintain contact in small threaded assemblies.
  • Electronic devices: Compact spring forms fit around fine screws without a full-size washer footprint.
  • Sensor assemblies: Steel or stainless options match the enclosure and environment.
  • Micro repair: Thread-matched inside diameter supports a controlled small-part replacement.

How to Specify Micro Spring Lock Washers for Your Application

  • Size: Match the nominal size to the mating thread or hole. This product spans M1–M1.7; 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 Trade series (miniature spring washers). 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 Micro Spring Lock Washers

  • 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 Micro Spring Lock Washers 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.

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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 (Trade series (miniature spring washers))

For thread sizeWasher formMaterial optionsApplication note
M1.0compact spring lock washersteel / stainless steelprecision instruments and electronic devices
M1.2compact spring lock washersteel / stainless steelprecision instruments and electronic devices
M1.4compact spring lock washersteel / stainless steelprecision instruments and electronic devices
M1.7compact spring lock washersteel / stainless steelprecision instruments and electronic devices
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 Micro Spring Lock Washers made to a recognized standard?

Yes — they are manufactured to Trade series (miniature spring washers), so dimensions are interchangeable between suppliers when you quote the standard on your order.

What are Micro Spring Lock Washers used for?

Adding a compact spring element under fine-thread hardware where the joint design calls for it. They are supplied to Trade series (miniature spring washers).

Which industries use Micro Spring Lock Washers?

They are commonly specified in micro repair, precision instruments and electronic devices, among other sectors.

How do I choose the right size of Micro Spring Lock Washers?

Match the nominal size to the mating thread or hole. This product is available from M1 to M1.7; the full dimension table on this page lists each size.

Can I get a quote for Micro Spring Lock Washers 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.