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Washers · GB/T 5782 / ISO 4014

M30 Spring Lock Washer Dimensions & Specifications

M30 Spring Lock Washer Dimensions & Specifications reference image

The M30 size of Spring Lock Washer is dimensioned by GB/T 5782 / ISO 4014. 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.

M30 Dimensional Row (GB/T 5782 / ISO 4014)

For bolt sizeInner diameter d1 (mm)Outer diameter d2 (mm)Width b (mm)Thickness t (mm)Reference standard
M3030.550.08.07.5GB/T 93 / DIN 127B

Spanner & Drive for M30 Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003)

Drive geometry for M30 Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003) is given by the row above; match the tool to the listed values.

Common Applications for M30 Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003)

M30 Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003) are commonly specified for high-load load-spreading on structural joints.

Installation Tips for M30 Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003)

  • At M30 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 M30

A M30 flat washer pairs with a M30 bolt/screw and matching M30 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.

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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 5782 / ISO 4014)

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

Should M30 Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003) be tightened by torque or by angle?

For critical structural joints at M30, 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 M30 structural bolts?

Grip ranges are highly application-dependent at M30. As a guide, choose a length that gives at least 1× the thread diameter engagement in the nut plus 2–3 thread pitches projecting.

Which washer dimensions matter most for M30?

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.

What is the coarse-thread pitch of M30 for Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003)?

For M30 the standard coarse pitch is 3.5 mm — this is the value used for Spring Lock Washer — GB/T 5782 / ISO 4014 (Series 003).

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.