Skip to content
info@engineeringhardware.com
Request a Quote

Washers · DIN 9021

M30 Fender Washers Dimensions & Specifications

M30 Fender Washers Dimensions & Specifications reference image

Dimensional and assembly data for M30 Fender Washers to DIN 9021. Includes head size and width across flats, clearance-hole and tapping-drill diameters, tightening torque per property class, and the sizes to step up or down to when the joint requires it.

M30 Dimensional Row (DIN 9021)

For bolt sizeInner diameter d1 min (mm)Outer diameter d2 max (mm)Thickness h (mm)Reference standardNotes
M3031.090.06.0DIN 9021 / ISO 7093Oversized OD for bearing on soft materials

Spanner & Drive for M30 Fender Washers

Drive geometry for M30 Fender Washers is given by the row above; match the tool to the listed values.

Common Applications for M30 Fender Washers

M30 Fender Washers are commonly specified for high-load load-spreading on structural joints.

Installation Tips for M30 Fender Washers

  • 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.

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 (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

What is the coarse-thread pitch of M30 for Fender Washers?

For M30 the standard coarse pitch is 3.5 mm — this is the value used for Fender Washers.

What clearance and tapping drill suit M30?

Use a 33 mm clearance hole (ISO 273 medium) for through-fixing, or a 26.5 mm tapping drill for a coarse M30 thread.

Should M30 Fender Washers 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.

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.