Slotted hole fixings up to 12.9 strength classes
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.
- 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
|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|
subject to technical changes
Areas of application in which the NSK-B is used.
Listed below are all the documents that give you more details about the NSK-B. Click on the PDF symbol to start the download.