#4 External Internal Combination Tooth Lock Washer Zinc NR5 The Grade 5 rating indicates

The Grade 5 rating indicates that the screw has a tensile strength of 120

They are commonly used in wood applications where a strong and secure connection is required

This 1 1/2"-6 x 5 1/2" Hex Cap Screw is a high-quality fastener designed for use in a variety of applications

It has a finished surface and is designed to be used with 5/16-18 bolts

#4 External Internal Combination Tooth Lock Washer Zinc NR5 The Grade 5 rating indicates#4 External Internal Combination Tooth Lock Washer Zinc The #4 External Internal Combination Tooth Lock Washer Zinc is a versatile and effective locking washer that provides both external and internal teeth for a secure hold. The external teeth bite into the mating surface, while the internal teeth grip the bolt or screw. This washer is made of zinc plated steel for corrosion resistance and durability. It is ideal for use in a variety of applications,