M8 Split Lock Washer (Spring Washer), DIN 127

Made for M8 screws, this split lock washer (DIN 127) has an 8.1 to 8.5 mm hole and is up to 14.8 mm across, 4 to 4.7 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: din127-b-m8
• Standard: DIN 127:1987 · size M8

Files

Part key	Simplified
din127-b-m8	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d1	Inside diameter	8.1		8.5	8.3	midpoint of min–max	L1
d2	Outside diameter			14.8	14.8	single limit (max), modeled at the limit	L1
b	Section width	2.85	3	3.15	3	nominal	L1
s	Section thickness	1.9	2	2.1	2	nominal	L1
r	Section corner radius		0.5		0.5	nominal	L1
h	Free height	4		4.7	4.35	midpoint of min–max	L1

Drawing

As a PDF: CC-DIN127-SZ-M8.pdf.

Goes with the M8 split lock washer

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

The M8 split lock washer beside the M6

The M8 is the largest of the 7 DIN 127 split lock washers published here, from M2 to M8.

• Inside diameter (d1): 8.1 to 8.5 mm on the M8 split lock washer, against 6.1 to 6.5 mm on the M6.
• Outside diameter (d2): up to 14.8 mm on the M8 split lock washer, against up to 11.8 mm on the M6.
• Section width (b): 3 mm on the M8 split lock washer, against 2.5 mm on the M6.
• Section thickness (s): 2 mm on the M8 split lock washer, against 1.6 mm on the M6.
• Section corner radius (r): 0.5 mm on the M8 split lock washer, against 0.3 mm on the M6.
• Free height (h): 4 to 4.7 mm on the M8 split lock washer, against 3.2 to 3.8 mm on the M6.

Other sizes

• One size smaller: M6 Split Lock Washer (Spring Washer), DIN 127, 6.1 to 6.5 mm hole, up to 11.8 mm OD.

Documents

• CC-DIN127-DS-M8.pdf: M8 datasheet: values with levels, sources
• CC-DIN127-SZ-M8.pdf: M8 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

fasten-it-din127, fasteners-eu-din127, fasteners-eu-din127-a-section, globalfastener-din127, globalfastener-din127-a-section. Full citations: the method page and this size's datasheet.

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