Allstar Performance Lock Washers are split-style washers used under a bolt head to help resist loosening from vibration. This washer is sized for 7/16in socket head cap screws (SHCS) and measures 0.438in inside diameter, 0.646in outside diameter, and 0.15in thick. The washers are made from steel with a black oxide finish. Sold in a set of 25, part number ALL16133-25.
FAQ
What size is this lock washer?
This washer is sized for 7/16in socket head cap screws (SHCS) and measures 0.438in inside diameter.
How many washers come in this pack?
This pack includes 25 lock washers.
What material and finish do these washers have?
The washers are made from steel with a black oxide finish.
What is the purpose of a lock washer?
A split lock washer sits under a bolt head and helps resist loosening from vibration.

