NSK-L

Standard drillings & slotted hole fixings up to 12.9 strength classes

Overview
Functional principle
Quality assurance
Dimension
Application areas
Downloads

If high spring action is required across all strength classes, the "NSK-L" locking washer is the optimum solution for all applications.

Due to its compact component size, the NSK-L can be used universally. Due to the high wall thickness, it can be used for both standard holes and slotted holes.

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.
Optimum locking function for slotted hole screw connections

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-L, 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-L 6	070230	C60, 1.1221	6,10 +0,48	14,20 -0,43	2,40 ±0,04	3,10 ±0,20
NSK-L 8	070240	C60, 1.1221	8,20 +0,58	18,20 -0,52	2,40 ±0,05	3,40 ±0,25
NSK-L 10	070250	C60, 1.1221	10,20 +0,58	22,25 -0,52	2,80 ±0,06	3,70 ±0,25
NSK-L 12	070260	C60, 1.1221	12,40 +0,58	27,25 -0,52	2,80 ±0,06	4,30 ±0,25
NSK-L 14	070270	C60, 1.1221	14,40 +0,58	30,25 -0,52	3,50 ±0,06	4,70 ±0,25
NSK-L 16	070280	C60, 1.1221	16,40 +0,58	32,50 -0,52	3,50 ±0,07	4,90 ±0,30
NSK-L 20	070300	51CrV4, 1.8159	21,00 +0,58	40,00 -0,52	4,00 ±0,07	6,00 ±0,30

NSK-L 6	076230	1.4401 / A4	6,10 +0,48	14,20 -0,43	2,40 ±0,04	3,10 ±0,20
NSK-L 8	076240	1.4401 / A4	8,20 +0,58	18,20 -0,52	2,40 ±0,05	3,40 ±0,25
NSK-L 10	076250	1.4401 / A4	10,20 +0,58	22,25 -0,52	2,80 ±0,06	3,70 ±0,25
NSK-L 12	076250	1.4401 / A4	12,40 +0,58	27,25 -0,52	2,80 ±0,06	4,30 ±0,25
NSK-L 14	076270	1.4401 / A4	14,40 +0,58	30,25 -0,52	3,50 ±0,06	4,70 ±0,25
NSK-L 16	076280	1.4401 / A4	16,40 +0,58	32,50 -0,52	3,50 ±0,07	4,90 ±0,30
NSK-L 20	076300	1.4401 / A4	21,00 +0,58	40,00 -0,52	4,00 ±0,07	6,00 ±0,30