M8 Serrated Lock Washer, Form A (External Teeth), DIN 6798

Made for M8 screws, this serrated lock washer (DIN 6798, form A, external teeth) has an 8.4 mm hole and is 15 mm across, 0.8 mm thick. It has 14 teeth. 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: din6798-a-m8
• Standard: DIN 6798:1988 · size M8

Files

Part key	Simplified
din6798-a-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, forms A and J	14.57	15	15	15	nominal	L1
s1	Sheet thickness, forms A and J		0.8		0.8	nominal	L1
teeth_A	Number of teeth, form A	14			14	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-DIN6798-SZ-M8.pdf.

Goes with the M8 serrated lock washer

• ISO 4762 socket head cap screw in 14 lengths from 12 to 80 mm, the same size as this M8 form A serrated lock 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 form A serrated lock washer: M8 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 4032 hex nut, the same size as this M8 form A serrated lock washer: M8 Hex Nut (Hexagon Nut), ISO 4032 / DIN 934

The M8 form A serrated lock washer beside the M6

The M8 is the largest of the 7 DIN 6798 serrated lock washers published here, from M2 to M8.

• Inside diameter (d1): 8.4 mm on the M8 form A serrated lock washer, against 6.4 mm on the M6.
• Outside diameter (d2): 15 mm on the M8 form A serrated lock washer, against 11 mm on the M6.
• Sheet thickness (s1): 0.8 mm on the M8 form A serrated lock washer, against 0.7 mm on the M6.
• Number of teeth (teeth_A): at least 14 on the M8 form A serrated lock washer, against at least 12 on the M6.

The M8 form A serrated lock washer in its other forms

• M8 Serrated Lock Washer, Form J (Internal Teeth), DIN 6798: number of teeth at least 10.
• M8 Serrated Lock Washer, Form V (Countersunk), DIN 6798: outside diameter 15.3 mm, sheet thickness 0.4 mm, number of teeth at least 18.

Other sizes

• One size smaller: M6 Serrated Lock Washer, Form A (External Teeth), DIN 6798, 6.4 mm hole, 11 mm OD.

Documents

• CC-DIN6798-DS-M8.pdf: M8 datasheet: values with levels, sources
• CC-DIN6798-SZ-M8.pdf: M8 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

bossard-bn786, engineersedge-din6798, fasten-it-din6798, globalfastener-din6798-a, globalfastener-din6798-j, globalfastener-din6798-v. Full citations: the method page and this size's datasheet.

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