M4 Metric Washers in Brass

This page lists all the various types of M4 Metric Washers in Brass that we currently offer. Use this page to help select suitable washers for M4 metric bolts or screws.

The accompanying flat washer dimension table allows convenient comparison between the available M4 flat washer dimensions. The table only includes flat washers and, for completeness, may include washers only available in other materials.

M4 Flat Washer Dimensions (mm)
Type	inner diameter	outer diameter	thickness
Form A DIN 125	4.3	9.0	0.8
Form C BS 4320	4.2	10	0.8
ISO 7089	4.3	9.0	0.8
ISO 7090	4.3	9.0	0.8
DIN 9021	4.3	12	1.0
For Cheesehead DIN 433	4.3	8.0	0.5
Penny v1	4.3	12	1.0-1.5
Penny v2	4.3	15	1.0-1.5
Penny v3	4.3	20	1.0-1.5
Penny v4	4.3	25	1.0-1.5
Westfield Fasteners Ltd 2024

M4 Flat Washer Dimensions (mm)
Type	inner diameter	outer diameter	thickness
Form A DIN 125	4.3	9.0	0.8
Form C BS 4320	4.2	10	0.8
ISO 7089	4.3	9.0	0.8
ISO 7090	4.3	9.0	0.8
DIN 9021	4.3	12	1.0
For Cheesehead DIN 433	4.3	8.0	0.5
Penny v1	4.3	12	1.0-1.5
Penny v2	4.3	15	1.0-1.5
Penny v3	4.3	20	1.0-1.5
Penny v4	4.3	25	1.0-1.5
Westfield Fasteners Ltd 2024

Image	Description	Price
[datasheet]	M4 Form A Washer in solid Brass WF20182	£0.00
[datasheet]	M4 DIN 9021 Washer in solid Brass WF44209	£0.00

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M4 Form A Washer in solid Brass
WF20182

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M4 DIN 9021 Washer in solid Brass
WF44209

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Prices are subject to quantity discounts based on a sliding scale. Enter the desired quantity in the relevant box in the table above. This will automatically calculate a line price indicating the applicable rate for the quantities selected. All prices shown exclude VAT.