Skip to content
info@engineeringhardware.com
Request a Quote

Washers · GB/T 97.1 / ISO 7089

M8 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086)

A flat plain washer (gb/t 95) — gb/t 97.1 / iso 7089 (series 086 in M8: this guide pulls the row from the standard, adds the assembly numbers an engineer actually uses, and links you straight to a quote.

M8 Dimensional Row (GB/T 97.1 / ISO 7089)

For bolt sizeInner diameter d1 (mm)Outer diameter d2 (mm)Thickness t (mm)Reference standard
M88.416.01.6ISO 7089 / GB/T 97.1

Spanner & Drive for M8 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086)

Drive geometry for M8 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086) is given by the row above; match the tool to the listed values.

Common Applications for M8 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086)

M8 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086) are commonly specified for general-purpose load-spreading and locking under machine bolts.

Mating Parts for M8

A M8 flat washer pairs with a M8 bolt/screw and matching M8 nut.

When to Step Up or Down from M8

When the joint preload approaches the proof load of M8 class 8.8, step up to M10 class 8.8 (or move to M8 class 10.9). When the joint is over-specified, M6 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.

Request a Quotation

Specification
Business Information

Dimensions & Specifications (GB/T 97.1 / ISO 7089)

For bolt sizeInner diameter d1 (mm)Outer diameter d2 (mm)Thickness t (mm)Reference standard
M33.27.00.5ISO 7089 / GB/T 97.1
M44.39.00.8ISO 7089 / GB/T 97.1
M55.310.01.0ISO 7089 / GB/T 97.1
M66.412.01.6ISO 7089 / GB/T 97.1
M88.416.01.6ISO 7089 / GB/T 97.1
M1010.520.02.0ISO 7089 / GB/T 97.1
M1213.024.02.5ISO 7089 / GB/T 97.1
M1415.028.02.5ISO 7089 / GB/T 97.1
M1617.030.03.0ISO 7089 / GB/T 97.1
M1819.034.03.0ISO 7089 / GB/T 97.1
M2021.037.03.0ISO 7089 / GB/T 97.1
M2425.044.04.0ISO 7089 / GB/T 97.1
M3031.056.04.0ISO 7089 / GB/T 97.1
M3637.066.05.0ISO 7089 / GB/T 97.1

Frequently Asked Questions

Which washer dimensions matter most for M8?

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 M8 for Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086)?

For M8 the standard coarse pitch is 1.25 mm — this is the value used for Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086).

What clearance and tapping drill suit M8?

Use a 9 mm clearance hole (ISO 273 medium) for through-fixing, or a 6.8 mm tapping drill for a coarse M8 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.