NSK-B

Slotted hole fixings up to 12.9 strength classes

Overview
Functional principle
Quality assurance
Dimension
Application areas
Downloads

The NSK-B has been specially developed for securing on slotted hole joints and is characterized by a high wall thickness and large outside diameter. Due to its special design, it is able to counteract a loss of preload force in the case of larger setting amounts.

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-B, 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-B 5	070520	C60, 1.1221	5,10 +0,48	18,20 -0,52	1,40 ±0,04	2,60 ±0,20
NSK-B 6	070530	C60, 1.1221	6,10 +0,48	18,20 -0,52	1,40 ±0,04	2,60 ±0,20
NSK-B 8	070540	C60, 1.1221	8,20 +0,58	22,25 -0,52	1,90 ±0,05	3,10 ±0,25
NSK-B 10	070550	C60, 1.1221	10,20 +0,58	27,25 -0,52	2,40 ±0,05	3,60 ±0,25
NSK-B 12	070560	C60, 1.1221	12,40 +0,58	32,30 -0,62	2,80 ±0,06	4,80 ±0,25
NSK-B 16	070580	51CrV4, 1.8159	16,40 +0,58	45,00 -0,62	3,50 ±0,07	6,10 ±0,50

NSK-B 5	076520	1.4401 / A4	5,10 +0,48	18,20 -0,52	1,40 ±0,04	2,60 ±0,20
NSK-B 6	076530	1.4401 / A4	6,10 +0,48	18,20 -0,52	1,40 ±0,04	2,60 ±0,20
NSK-B 8	076540	1.4401 / A4	8,20 +0,58	22,25 -0,52	1,90 ±0,05	3,10 ±0,25
NSK-B 10	076550	1.4401 / A4	10,20 +0,58	27,25 -0,52	2,40 ±0,05	3,60 ±0,25
NSK-B 12	076560	1.4401 / A4	12,40 +0,58	32,30 -0,62	2,80 ±0,06	4,80 ±0,25
NSK-B 16	076580	1.4401 / A4	16,40 +0,58	45,00 -0,62	3,50 ±0,07	6,10 ±0,50