GN 638--Steel, black oxide finish
GN 638-NI and GN 638-NV--Stainless steel, European standard No. 1.4305 (American standard 303)
GN 638 and GN 638-NI--Matte black technopolymer plastic (Polyacetal POM)
GN 638-NV--Stainless steel, European standard No. 1.4305 (American standard 303)
O-ring (GN 638-NV only): FPM Rubber (Viton®)
||GN 638 grub screw and thrust pad assemblies are a low cost solution for clamping operations or for load bearing purposes.
Another good feature is a smaller size ball diameter than the trunk of the threaded stud.
As a result, the studs can be screwed into position from the ball side. The thrust pad can easily be hammered onto the ball end of the screw, and also easily dismantled.
Static load capacity has been determined by a series of tests but are approximate. For these tests the loads were placed vertically and centrally over the stud. At the measured load of 3500 N there was no remaining deformation visible on the thrust pad nor was there any breakage.
A combination of these assemblies with any handle component will give useful clamping options.
GN 638 and GN 638-NI temperature resistant to 80°C (175°F), GN 638-NV temperature resistant to 200°C (390°F)