Skip to content
info@engineeringhardware.com
Request a Quote

Washers · ISO 7980 / DIN 127

M5 Spring Lock Washers Dimensions & Specifications

M5 Spring Lock Washers Dimensions & Specifications reference image

The M5 size of Spring Lock Washers is dimensioned by ISO 7980 / DIN 127. The tables below give the dimensional row from the standard, the drill and spanner sizes that go with it, and the assembly torque per property class. The technical drawing on this page redraws to the exact values selected.

M5 Dimensional Row (ISO 7980 / DIN 127)

For bolt sizeInner diameter d1 min (mm)Outer diameter d2 max (mm)Width b (mm)Thickness s (mm)Reference standard
M55.19.23.01.2ISO 7980 / DIN 127

Spanner & Drive for M5 Spring Lock Washers

Drive geometry for M5 Spring Lock Washers is given by the row above; match the tool to the listed values.

Common Applications for M5 Spring Lock Washers

M5 Spring Lock Washers are commonly specified for small electronics hardware and precision assemblies.

Installation Tips for M5 Spring Lock Washers

  • At M5 the joint is sensitive to over-torque — use a torque-limiting driver and check the head doesn't bury into a softer counterpart.

When to Step Up or Down from M5

When the joint preload approaches the proof load of M5 class 8.8, step up to M6 class 8.8 (or move to M5 class 10.9). When the joint is over-specified, M4 often saves weight and cost without losing the safety margin.

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

Adjust the parameters in the drawing above and click "Request this configuration" to send the exact specification straight to this form.

Request a Quotation

Specification
Business Information

Dimensions & Specifications (ISO 7980 / DIN 127)

For bolt sizeInner diameter d1 min (mm)Outer diameter d2 max (mm)Width b (mm)Thickness s (mm)Reference standard
M22.14.41.60.5ISO 7980 / DIN 127
M2.52.65.12.00.6ISO 7980 / DIN 127
M33.16.22.00.8ISO 7980 / DIN 127
M3.53.67.02.50.8ISO 7980 / DIN 127
M44.17.62.51.0ISO 7980 / DIN 127
M55.19.23.01.2ISO 7980 / DIN 127
M66.111.84.01.6ISO 7980 / DIN 127
M77.113.14.01.6ISO 7980 / DIN 127
M88.114.85.02.0ISO 7980 / DIN 127
M1010.218.16.02.2ISO 7980 / DIN 127
M1212.221.17.02.5ISO 7980 / DIN 127
M1414.224.18.03.0ISO 7980 / DIN 127
M1616.227.49.03.5ISO 7980 / DIN 127
M1818.229.49.03.5ISO 7980 / DIN 127
M2020.233.610.04.0ISO 7980 / DIN 127
M2222.535.911.04.0ISO 7980 / DIN 127
M2424.540.112.05.0ISO 7980 / DIN 127
M2727.544.812.05.0ISO 7980 / DIN 127
M3030.550.014.06.0ISO 7980 / DIN 127
M3636.560.016.07.0ISO 7980 / DIN 127

Frequently Asked Questions

What clearance and tapping drill suit M5?

Use a 5.5 mm clearance hole (ISO 273 medium) for through-fixing, or a 4.2 mm tapping drill for a coarse M5 thread.

Is M5 Spring Lock Washers suitable for electronics and small mechanisms?

M5 Spring Lock Washers is in the micro range and is widely used in electronics, instrument enclosures and small precision mechanisms. Watch the over-torque margin — micro joints strip easily.

What's the typical proof load behavior of M5 class 8.8?

Micro-thread joints are sensitive to plastic deformation in the first turn under load — use a torque-limiting driver and check the bearing surface deformation on softer mating materials.

Which washer dimensions matter most for M5?

For a flat washer, the outside diameter (the bearing surface) and the thickness control how the load is spread under the head and how much elastic preload is preserved. The inside diameter must clear the bolt body but not be so large that the head bears mostly on the washer's outer rim.

How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.