Product description
The influence of a washer on the quality of the screwed connection is very often underestimated. With washers GN 6339, high quality preloaded screwed connections can be established. A high static clamping force can be reached avoiding loss of tension.
At a specified preloaded clamping force it is often possible to use thinner bolts. This can result in a better ratio between clamping distance and bolt diameter to minimise the danger of failure.
The case-hardened smooth bolt head/screw contact face leads to a lower and more constant friction co-efficient even when continuous clamping and releasing operations are required.
Washers GN 6339 are only suitable for machine con-struction bolts of classes 8.8 / 10.9 / 12.9, and not for steel bolts DIN 6916.
Specification
Steel, 1.7227 (42 CrMoS 4 V)
- Tempered to tensile strength
Rm = 1220 ... 1400 N/mm² - Fine turned and slide ground
BlackenedBT
GEOMET 500-treatedGO
RoHS