1/2-13 Serrated Flange Hex Lock Nuts Grade 8 Zinc Yellow D9338 It has a round head

It has a round head with a square neck

These 8-32 x 1/4 x 3/32 Small Pattern Hex Machine Screw Nuts are made of zinc-plated steel for durability and corrosion resistance

while the 4-inch length provides ample reach

guaranteeing quality and reliability

The two-piece construction allows for easy installation and removal

1/2-13 Serrated Flange Hex Lock Nuts Grade 8 Zinc Yellow D9338 It has a round headThese 1 2 13 Serrated Flange Hex Lock Nuts are made of Grade 8 steel and have a zinc yellow finish. They are designed to be used with bolts of the same size and thread pitch. The serrated flange helps to prevent the nut from loosening due to vibration or movement. These nuts are commonly used in automotive, construction, and other industrial applications. They are also known as prevailing torque nuts or lock nuts.