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Washers · GB/T 858

M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 089)

On the bench specifying M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 089)? This page gives the controlling dimensions for the M12 size of Tab Lock Washer for Round Nut — GB/T 858 (Series 089) (to GB/T 858).

M12 Dimensional Row (GB/T 858)

For shaft / nut sizeInner diameter d1 (mm)Outer diameter d2 (mm)Thickness t (mm)Tab length (mm)Reference standard
M1212.5251.09GB/T 858

Spanner & Drive for M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 089)

Drive geometry for M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 089) is given by the row above; match the tool to the listed values.

Common Applications for M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 089)

M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 089) are commonly specified for medium-duty structural joints.

Mating Parts for M12

A M12 flat washer pairs with a M12 bolt/screw and matching M12 nut.

When to Step Up or Down from M12

When the joint preload approaches the proof load of M12 class 8.8, step up to M16 class 8.8 (or move to M12 class 10.9). When the joint is over-specified, M10 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.

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Specification
Business Information

Dimensions & Specifications (GB/T 858)

For shaft / nut sizeInner diameter d1 (mm)Outer diameter d2 (mm)Thickness t (mm)Tab length (mm)Reference standard
M1010.5211.08GB/T 858
M1212.5251.09GB/T 858
M1616.5301.010GB/T 858
M2020.5381.512GB/T 858
M2424.5451.514GB/T 858
M3030.5551.516GB/T 858
M3636.5652.018GB/T 858
M4848.5852.020GB/T 858
M6060.51052.524GB/T 858

Frequently Asked Questions

What clearance and tapping drill suit M12?

Use a 13.5 mm clearance hole (ISO 273 medium) for through-fixing, or a 10.2 mm tapping drill for a coarse M12 thread.

Which washer dimensions matter most for M12?

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 M12 for Tab Lock Washer for Round Nut — GB/T 858 (Series 089)?

For M12 the standard coarse pitch is 1.75 mm — this is the value used for Tab Lock Washer for Round Nut — GB/T 858 (Series 089).

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.