Skip to content
info@engineeringhardware.com
Request a Quote

Washers · GB/T 858

M6 Plain Washer — GB/T 858 (Series 071)

A plain washer — gb/t 858 (series 071 in M6: this guide pulls the row from the standard, adds the assembly numbers an engineer actually uses, and links you straight to a quote.

M6 Dimensional Row (GB/T 858)

For bolt sizeInner diameter d1 (mm)Outer diameter d2 (mm)Thickness t (mm)Reference standard
M66.412.01.6ISO 7089 / GB/T 97.1

Spanner & Drive for M6 Plain Washer — GB/T 858 (Series 071)

Drive geometry for M6 Plain Washer — GB/T 858 (Series 071) is given by the row above; match the tool to the listed values.

Common Applications for M6 Plain Washer — GB/T 858 (Series 071)

M6 Plain Washer — GB/T 858 (Series 071) are commonly specified for general-purpose load-spreading and locking under machine bolts.

Mating Parts for M6

A M6 flat washer pairs with a M6 bolt/screw and matching M6 nut.

When to Step Up or Down from M6

When the joint preload approaches the proof load of M6 class 8.8, step up to M8 class 8.8 (or move to M6 class 10.9). When the joint is over-specified, M5 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 858)

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 M6?

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 M6 for Plain Washer — GB/T 858 (Series 071)?

For M6 the standard coarse pitch is 1 mm — this is the value used for Plain Washer — GB/T 858 (Series 071).

What clearance and tapping drill suit M6?

Use a 6.6 mm clearance hole (ISO 273 medium) for through-fixing, or a 5 mm tapping drill for a coarse M6 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.