GN 6303.1 quick release knurled nuts are used in such applications where the nut has to be completely removed after the releasing operation and mounted again rapidly for re-clamping.
The nut is tilted over the threaded spindle. When in position, the nut is brought into a straight position for mating of the two threads on the nut and spindle. The nut will then have to be turned only by a fraction of a rotation to achieve clamping.
Functional safety exists only if the clamping surface lies at a right angle to the threaded bolt.
European Standard No. 1.4305 (AISI 303)
Matte shot-blasted finish