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Washers · DIN 9021

M12 Fender Washers

A fender washer in M12: this guide pulls the row from the standard, adds the assembly numbers an engineer actually uses, and links you straight to a quote.

M12 Dimensional Row (DIN 9021)

For bolt sizeInner diameter d1 min (mm)Outer diameter d2 max (mm)Thickness h (mm)Reference standardNotes
M1213.037.03.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials

Spanner & Drive for M12 Fender Washers

Drive geometry for M12 Fender Washers is given by the row above; match the tool to the listed values.

Common Applications for M12 Fender Washers

M12 Fender Washers 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 (DIN 9021)

For bolt sizeInner diameter d1 min (mm)Outer diameter d2 max (mm)Thickness h (mm)Reference standardNotes
M33.29.00.8DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M44.312.01.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M55.315.01.2DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M66.418.01.6DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M88.424.02.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M1010.530.02.5DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M1213.037.03.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M1415.044.03.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M1617.050.03.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M2021.060.04.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M2425.072.05.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M3031.090.06.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials
M3637.0110.08.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials

Frequently Asked Questions

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 Fender Washers?

For M12 the standard coarse pitch is 1.75 mm — this is the value used for Fender Washers.

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.

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.