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Washers · GB/T 93 / DIN 127B

M18 Spring Lock Washer (GB/T 93) Dimensions & Specifications

M18 Spring Lock Washer (GB/T 93) Dimensions & Specifications reference image

M18 Spring Lock Washer (GB/T 93) are manufactured to GB/T 93 / DIN 127B with a coarse thread pitch of 2.5 mm. This page lists the controlling dimensions for the M18 size — head geometry, width across flats, matching spanner size — together with the clearance hole, tapping drill and tightening torque used at assembly.

M18 Dimensional Row (GB/T 93 / DIN 127B)

For bolt sizeInner diameter d1 (mm)Outer diameter d2 (mm)Width b (mm)Thickness t (mm)Reference standard
M1818.229.45.04.5GB/T 93 / DIN 127B

Spanner & Drive for M18 Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081)

Drive geometry for M18 Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081) is given by the row above; match the tool to the listed values.

Common Applications for M18 Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081)

M18 Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081) are commonly specified for high-load load-spreading on structural joints.

Installation Tips for M18 Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081)

  • At M18 the stretch in the bolt becomes the controlling factor — for critical joints, use angle-controlled or stretch-controlled tightening instead of pure torque.

Mating Parts for M18

A M18 flat washer pairs with a M18 bolt/screw and matching M18 nut.

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.

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Specification
Business Information

Dimensions & Specifications (GB/T 93 / DIN 127B)

For bolt sizeInner diameter d1 (mm)Outer diameter d2 (mm)Width b (mm)Thickness t (mm)Reference standard
M33.16.21.00.8GB/T 93 / DIN 127B
M44.17.61.21.0GB/T 93 / DIN 127B
M55.19.21.51.2GB/T 93 / DIN 127B
M66.111.82.01.6GB/T 93 / DIN 127B
M88.114.82.52.0GB/T 93 / DIN 127B
M1010.218.13.02.5GB/T 93 / DIN 127B
M1212.221.13.53.0GB/T 93 / DIN 127B
M1414.224.14.03.5GB/T 93 / DIN 127B
M1616.227.44.54.0GB/T 93 / DIN 127B
M1818.229.45.04.5GB/T 93 / DIN 127B
M2020.233.65.55.0GB/T 93 / DIN 127B
M2424.540.16.56.0GB/T 93 / DIN 127B
M3030.550.08.07.5GB/T 93 / DIN 127B

Frequently Asked Questions

What is the coarse-thread pitch of M18 for Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081)?

For M18 the standard coarse pitch is 2.5 mm — this is the value used for Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081).

What clearance and tapping drill suit M18?

Use a 20 mm clearance hole (ISO 273 medium) for through-fixing, or a 15.5 mm tapping drill for a coarse M18 thread.

Should M18 Spring Lock Washer (GB/T 93) — GB/T 93 / DIN 127B (Series 081) be tightened by torque or by angle?

For critical structural joints at M18, angle-controlled or stretch-controlled tightening is more repeatable than pure torque — the friction scatter at large diameters can dominate the torque signal.

What grip range is typical for M18 structural bolts?

Grip ranges are highly application-dependent at M18. As a guide, choose a length that gives at least 1× the thread diameter engagement in the nut plus 2–3 thread pitches projecting.

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.