DIN25201 STANDARD

Stainless Steel 316 DIN25201 Polished Washer

High Strength Lock Washer with Anti Vibration Technology. Precision-engineered dual-stacked self-locking design for critical fastening applications.

SUS316

Premium Grade

HV550

Max Hardness

±0.1mm

Precision Tolerance

A2/A4

Quality Grade

Technical Specifications

DIN25201 dual-stacked self-locking washers available in SUS304.316 (A2.A4) grades

Washer Size	Bolt Size Metric	UNC	d1 (mm)	d2 (mm)	Thickness T (mm)	Min. Package (pairs)	Weight Kg/100 pairs
NL3ss	M3	#6	3.9	7.6	2.2	200	0.04
NL3.5ss	M3.5	#6	3.9	7.6	2.2	200	0.04
NL4ss	M4	#8	4.4	9.0	2.2	200	0.07
NL4.5ss	M4.5	#9	4.9	9.2	2.2	200	0.07
NL5ss	M5	#10	5.4	10.8	2.2	200	0.10
NL5.5ss	M5.5	#12	5.4	10.8	2.2	200	0.10
NL6ss	M6	1/4"	7.2	13.5	2.2	200	0.12
NL8ss	M8	5/16"	8.7	16.6	2.0	200	0.22
NL10ss	M10	3/8"	10.7	21.0	2.0	200	0.38
NL12ss	M12	-	13.0	19.5	2.0	200	0.27
NL16ss	M16	5/8"	17.0	30.7	3.2	100	1.56
NL20ss	M20	-	21.4	39.0	3.2	100	2.08
NL24ss	M24	-	25.3	49.5	3.2	100	3.22
NL30ss	M30	1-1/8"	31.4	47.0	6.8	25	4.43
NL36ss	M36	1-3/8"	40.4	58.5	6.8	25	6.74
NL48ss	M48	-	53.6	80.0	9.0	1	20.10
NL60ss	M60	-	63.1	90.0	9.0	1	23.50
NL80ss	M80	-	83.1	115.0	9.0	1	36.0

Inner Diameter (Øi)

NL3ss–NL8ss: ±0.1 mm NL10ss–NL42ss: ±0.2 mm NL45ss–NL130ss: +0.5/-0.0 mm

Outer Diameter (Øo)

NL3ss–NL42ss: ±0.2 mm NL27ss–NL42ss: ±0.3 mm NL45ss–NL130ss: +0.0/-2.0 mm

Thickness (T)

NL3ss–NL42ss: ±0.25 mm NL27ss–NL42ss: ±0.5 mm NL45ss–NL130ss: ±0.75 mm

Premium Materials

SUS304.316 (A2.A4) and custom special materials

Surface Hardening

Stainless steel hardness treatment (HV350-550)

Anti-Vibration Design

Dual-stacked self-locking mechanism prevents loosening

Technical Notice: Technical standards are subject to update without prior notice!

Get precision-engineered lock washers tailored to your specifications. Our expert team delivers quality solutions with 24-hour sampling service.

500 PCS

Minimum Order

24H

Sample Ready

±0.1mm

Precision