Standard parts · fastener

Spring lock washers (DIN 127B)

DIN 127B spring lock washers: 7 sizes. Dimensions: outer diameter, inner diameter, thickness. Threads M3, M4, M5 and more. Use parts in kernelCAD Studio or MCP.

Front and top view of M6 lock washer (DIN 127B), projected from the catalog STEP file. The catalog solid is simplified (no modeled thread or drive recess), so read dimensions from the table, not from the drawing.

Dimensions

Part	Thread	Outer diameter (mm)	Inner diameter (mm)	Thickness (mm)
M3 lock washer (DIN 127B)	M3	6.2	3.1	0.8
M4 lock washer (DIN 127B)	M4	7.6	4.1	1
M5 lock washer (DIN 127B)	M5	9.2	5.1	1.2
M6 lock washer (DIN 127B)	M6	11.5	6.1	1.6
M8 lock washer (DIN 127B)	M8	14.8	8.1	2
M10 lock washer (DIN 127B)	M10	18.1	10.2	2.2
M12 lock washer (DIN 127B)	M12	21.1	12.2	2.5

Standard: DIN 127B
Category: fastener
Licence: MIT

How the catalog geometry was checked

Verified method: S3 sweep; checked, not proven
Verified threads: M3, M4, M5, M6, M8, M10, M12
Verified thread points: 7
Verified requirements: envelope bbox band, volume >= 1 mm^3
Verified boundaries: 0 (discrete domain)
Verified points: 7

Use a size in a model

Every size is a catalog part with a STEP solid and mate connectors. Use a code-CAD script, or ask an agent through the MCP fetch_part tool, by its part ID:

const part = await lib.fetchPart('din-127b-m3');

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