M8 Flat Washer (Plain Washer), ISO 7089

Made for M8 screws, this flat washer (ISO 7089) has an 8.4 mm hole and is 16 mm across, 1.6 mm thick. Download it as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: M8 washer
• Model id: iso7089-m8
• Standard: ISO 7089:2000 · size M8

Files

Part key	Simplified
iso7089-m8	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d1	Inside diameter	8.4	8.4	8.62	8.4	nominal	L1
d2	Outside diameter	15.57	16	16	16	nominal	L1
h	Thickness	1.4	1.6	1.8	1.6	nominal	L1

Drawing

As a PDF: CC-ISO7089-SZ-M8.pdf.

Goes with the M8 flat washer

• ISO 4762 socket head cap screw in 14 lengths from 12 to 80 mm, the same size as this M8 flat washer: M8 Socket Head Cap Screw (Allen Bolt), ISO 4762 / DIN 912
• ISO 4017 hex head screw in 13 lengths from 16 to 80 mm, the same size as this M8 flat washer: M8 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 4032 hex nut, the same size as this M8 flat washer: M8 Hex Nut (Hexagon Nut), ISO 4032 / DIN 934

Approximate mass

Approximate mass of 1000 washers, from fasten.it's DIN EN ISO 7089 table (fasten-it-iso7089), column “weight in Kg x 1000 pcs (ρ=7,85 kg/dm3)”.

• mass per 1000: 1.83 kg

The M8 flat washer beside the M6

The M8 is the largest of the 7 ISO 7089 flat washers published here, from M2 to M8.

• Inside diameter (d1): 8.4 mm on the M8 flat washer, against 6.4 mm on the M6.
• Outside diameter (d2): 16 mm on the M8 flat washer, against 12 mm on the M6.
• Thickness (h): 1.6 mm on the M8 flat washer, the same on the M6.

Other sizes

• One size smaller: M6 Flat Washer (Plain Washer), ISO 7089, 6.4 mm hole, 12 mm OD.

Documents

• CC-ISO7089-DS-M8.pdf: M8 datasheet: values with levels, sources
• CC-ISO7089-SZ-M8.pdf: M8 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

amesweb-iso7089, fasten-it-iso7089, westfield-iso7089. Full citations: the method page and this size's datasheet.

Found an error? Use the feedback section on this page.