Schnorr disc springs safety washers are ideal for bolted connections to maintain a preload and prevent loosening. These safety washers are in the form of a disc spring which is serrated on both sides and of trapezoidal cross section available in diameters to suit all common bolt sizes. The outer diameter of the washer is matched to the head diameter of pan-head and socket head cap screws. They are also ideal for use with our ARP clutch to flywheel bolts.
They are not however, suitable for use with countersunk screws.
Sold individually.