NSK-M

Strength classes up to 8.8

Overview
Functional principle
Quality assurance
Dimension
Application areas
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The standard variant Form "M" is an economical solution for constructions where shear forces and settling amounts occur and can be used for strength classes up to 8.8.

Your benefits:

Secures against both loosening and loss of preload force in case of high vibrations.
Settling effects are minimized by the high spring effect.
Tested screw locking function at low and high preload forces.
Screw connections with short clamping length are reliably secured under dynamic loads.
Easy to install, as it is a one-piece locking element.

Due to the combination of toothed surface and resilient geometry, the locking washer counteracts both loosening and unscrewing and thus represents the optimum solution in terms of screw locking.

Positive locking effect

The positive locking effect below the screw head or nut is achieved by the specially serrated surface.

Springy, arched geometry

The frictional elastic effect is achieved by the resilient geometry and the material properties.

In order to guarantee the functionality of the NSK-M, a multi-stage product test is carried out that goes beyond the requirements of the standard:

Dynamic screw-locking test based on DIN 65161 or the increased requirements of DIN 25201-4 Annex B, including the specific application features of the electrical sector.

Residual spring force analysis according to DIN 267-26

Name	Article no.	Material	ØID	ØAD	S	H
NSK-M 4	070010	C60, 1.1221	4,10 +0,48	10,20 -0,40	1,00 ±0,04	1,45 ±0,20
NSK-M 5	070020	C60, 1.1221	5,10 +0,48	12,20 -0,40	1,20 ±0,04	1,75 ±0,20
NSK-M 6	070030	C60, 1.1221	6,10 +0,48	14,20 -0,43	1,40 ±0,04	2,15 ±0,20
NSK-M 8	070040	C60, 1.1221	8,20 +0,58	18,30 -0,52	1,40 ±0,04	2,70 ±0,25
NSK-M 10	070050	C60, 1.1221	10,20 +0,58	22,25 -0,52	1,60 ±0,05	3,10 ±0,25
NSK-M 12	070060	C60, 1.1221	12,40 +0,58	27,25 -0,52	1,80 ±0,05	3,65 ±0,25
NSK-M 14	070070	C60, 1.1221	14,40 +0,58	30,25 -0,62	2,40 ±0,06	3,90 ±0,25
NSK-M 16	070080	C60, 1.1221	16,40 +0,58	32,50 -0,62	2,50 ±0,06	4,60 ±0,30
NSK-M 18	070090	51CrV4, 1.8159	18,50 +0,75	35,00 -0,62	3,00 ±0,07	4,80 ±0,30
NSK-M 20	070100	51CrV4, 1.8159	21,00 +0,75	40,00 -0,62	3,00 ±0,07	5,00 ±0,30
NSK-M 22	070110	51CrV4, 1.8159	23,00 +0,75	45,00 -0,62	3,50 ±0,07	5,60 ±0,40
NSK-M 24	070120	51CrV4, 1.8159	25,00 +0,75	50,00 -0,62	3,50 ±0,07	5,80 ±0,40
NSK-M 27	070130	51CrV4, 1.8159	28,00 +0,85	60,00 -0,75	4,00 ±0,08	6,60 ±0,50
NSK-M 30	070140	51CrV4, 1.8159	31,00 +0,85	70,00 -0,75	4,50 ±0,08	7,00 ±0,50

NSK-M 4	076010	1.4401 / A4	4,10 +0,48	10,20 -0,40	1,00 ±0,04	1,45 ±0,20
NSK-M 5	076020	1.4401 / A4	5,10 +0,48	12,20 -0,40	1,20 ±0,04	1,75 ±0,20
NSK-M 6	076030	1.4401 / A4	6,10 +0,48	14,20 -0,43	1,40 ±0,04	2,15 ±0,20
NSK-M 8	076040	1.4401 / A4	8,20 +0,58	18,30 -0,52	1,40 ±0,04	2,70 ±0,25
NSK-M 10	076050	1.4401 / A4	10,20 +0,58	22,25 -0,52	1,60 ±0,05	3,10 ±0,25
NSK-M 12	076060	1.4401 / A4	12,40 +0,58	27,25 -0,52	1,80 ±0,05	3,65 ±0,25
NSK-M 14	076070	1.4401 / A4	14,40 +0,58	30,25 -0,62	2,40 ±0,06	3,90 ±0,25
NSK-M 16	076080	1.4401 / A4	16,40 +0,58	32,50 -0,62	2,50 ±0,06	4,60 ±0,30
NSK-M 18	076090	1.4401 / A4	18,50 +0,75	35,00 -0,62	3,00 ±0,07	4,80 ±0,30
NSK-M 20	076100	1.4401 / A4	21,00 +0,75	40,00 -0,62	3,00 ±0,07	5,00 ±0,30
NSK-M 22	076110	1.4401 / A4	23,00 +0,75	45,00 -0,62	3,50 ±0,07	5,60 ±0,40
NSK-M 24	076120	1.4401 / A4	25,00 +0,75	50,00 -0,62	3,50 ±0,07	5,80 ±0,40
NSK-M 27	076130	1.4401 / A4	28,00 +0,85	60,00 -0,75	4,00 ±0,08	6,60 ±0,50
NSK-M 30	076140	1.4401 / A4	31,00 +0,85	70,00 -0,75	4,50 ±0,08	7,00 ±0,50