#4 External Tooth Lock Washer Zinc BHT5 and it is threaded on

and it is threaded on the inside to fit a 5/8-11 bolt

making it suitable for use in outdoor or marine environments

These 4-40 x 3/16 x 1/16 Small Pattern Hex Machine Screw Nuts Plain are made of durable steel and have a plain finish

This 7/8-9 x 2 1/4 Hex Cap Screw is made of steel and has a Grade 8 strength rating

making these bolts ideal for outdoor use or in areas where moisture is present

#4 External Tooth Lock Washer Zinc BHT5 and it is threaded on#4 External Tooth Lock Washer Zinc is a versatile and reliable fastener designed to prevent loosening of bolted joints due to vibration or other dynamic forces. Crafted from durable zinc plated steel, it features external teeth that bite into the mating surface, creating a secure grip that resists rotation. Its compact size and ease of installation make it suitable for a wide range of applications, including automotive, industrial, and construction