M2.5 Serrated Lock Washer, Form V (Countersunk), DIN 6798

The M2.5 serrated lock washer (DIN 6798, form V, countersunk) is 0.4 mm thick, with a 2.7 mm hole and an outside diameter of 5.5 mm. It has 10 teeth. It sits under M2.5 screw heads and nuts; here as simplified STEP files.

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

• Also searched as: M2.5 washer
• Model id: din6798-v-m2-5
• Standard: DIN 6798:1988 · size M2.5

Files

Part key	Simplified
din6798-v-m2-5	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d1	Inside diameter	2.7	2.7	2.84	2.7	nominal	L1
d3	Outside diameter, form V		5.1	5.1	5.1	nominal	L1
s2	Sheet thickness, form V		0.2		0.2	nominal	L1
teeth_V	Number of teeth, form V	10			10	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-DIN6798-SZ-M2.5.pdf.

The M2.5 form V serrated lock washer beside the M2 and the M3

The M2.5 is number 2, counting from the smallest, of the 7 DIN 6798 serrated lock washers published here, from M2 to M8.

• Inside diameter (d1): 2.7 mm on the M2.5 form V serrated lock washer, against 2.2 mm on the M2 and 3.2 mm on the M3.
• Outside diameter (d3): 5.1 mm on the M2.5 form V serrated lock washer, against 4.2 mm on the M2 and 6 mm on the M3.
• Sheet thickness (s2): 0.2 mm on the M2.5 form V serrated lock washer, the same on the M2 and the M3.
• Number of teeth (teeth_V): at least 10 on the M2.5 form V serrated lock washer, against at least 10 on the M2 and at least 12 on the M3.

The M2.5 form V serrated lock washer in its other forms

• M2.5 Serrated Lock Washer, Form A (External Teeth), DIN 6798: outside diameter 5.5 mm, sheet thickness 0.4 mm, number of teeth at least 9.
• M2.5 Serrated Lock Washer, Form J (Internal Teeth), DIN 6798: outside diameter 5.5 mm, sheet thickness 0.4 mm, number of teeth at least 7.

Other sizes

• One size smaller: M2 Serrated Lock Washer, Form V (Countersunk), DIN 6798, 2.2 mm hole, 4.5 mm OD.
• One size larger: M3 Serrated Lock Washer, Form V (Countersunk), DIN 6798, 3.2 mm hole, 6 mm OD.

Documents

• CC-DIN6798-DS-M2.5.pdf: M2.5 datasheet: values with levels, sources
• CC-DIN6798-SZ-M2.5.pdf: M2.5 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

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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