Spring washer use

A spring washer assembly is placed under the nut to prevent loosening of the nut. It is stated in national standards.

The hexagonal slotted nut is designed to be used with a bolt with a hole at the end of the screw to insert the split pin into the hole of the screw from the groove of the nut to prevent the nut from automatically returning. It is mainly used for occasions with vibration load or alternating load. .

Methods for preventing the nut (or bolt) from automatically returning in mechanical design and production are:

1. Pad spring washer; (easy to do)

2. Use hexagonal slotted nut + cotter pin; (increased processing process compared to year-on-year)

3. Padded stop washers; (increased processing steps compared to the same period of last year)

4. Insert the hex head opening of the hex bolt into the steel wire. (increased processing steps compared to the same period last year)