DIN 125 Flat Washer

Flat washer DIN 125 is a flat-shaped fastening element that ensures reliable load distribution in a joint. It is made from various metals, including stainless steel.

Key characteristics

• Standard: complies with DIN and GOST.
• Material: stainless steel, zinc-plated metal.
• Diameter: from 3 mm to 48 mm.
• Thread: standard and metric.

The zinc-plated coating increases the washer’s corrosion resistance, which is important for use in harsh conditions.

Comparison with other washer types

Unlike lock washers and multi-tab washers, the flat washer DIN 125 is used in joints where additional locking is not required.

Summary

The flat washer DIN 125 is a fastening element complying with DIN and GOST standards. Thanks to their corrosion resistance, zinc-plated washers are suitable for use in harsh conditions.

DIN 125 dimensions

The table shows the main dimensions of the flat washer per DIN 125 standard.

d		d1	d2	s
Flat washer DIN 125	M2	2.2	5.0	0.3
	M2.5	2.7	6.0	0.5
	M3	3.2	7.0	0.5
	M4	4.3	9.0	0.8
	M5	5.3	10.0	1.0
	M6	6.4	12.0	1.6
	M8	8.4	16.0	1.6
	M10	10.5	20.0	2.0
	M12	13.0	24.0	2.5
	M14	15.0	28.0	2.5
	M16	17.0	30.0	3.0
	M18	19.0	34.0	3.0
	M20	21.0	37.0	3.0
	M22	23.0	39.0	3.0
	M24	25.0	44.0	4.0
	M27	28.0	50.0	4.0
	M30	31.0	56.0	4.0
	M33	34.0	60.0	5.0
	M36	37.0	66.0	5.0
	M39	40.0	72.0	6.0
	M42	43.0	78.0	7.0

Parameter	DIN 125	GOST 11371-78
d - thread diameter of the fastener, mm	from M1 to M90	from M1 to M48
h - washer thickness, mm	from 0.3 to 12	from 0.3 to 8
d₂ - outer diameter of the washer, mm	from 3 to 160	from 3.5 to 92
Product grade	A	A and C
Vickers hardness, HV	from 300 to 400	A ≥ 140 C ≥ 100