1/4-20 x 9/16 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc NS188 Its flat design ensures even

Its flat design ensures even load distribution and prevents damage to the mating surface

They have a hex head with an indented drive

or structures

These 8-15 x 2 1/2 Phillips Pan Self Tapping Screw Type A Fully Threaded Black Oxide are designed for use in a variety of applications

These 5-20 x 5/8 Phillips Pan Self Tapping Screw Type AB Fully Threaded Zinc are designed for use in a variety of applications

1/4-20 x 9/16 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc NS188 Its flat design ensures evenThe 1 4 20 x 9 16 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc is a versatile fastener designed for a wide range of applications. It features a 1 4 20 thread size and a 9 16 inch head diameter, providing a secure hold in various materials. The serrated hex flange washer helps distribute load and prevent the screw from loosening due to vibration or movement. The full thread design allows for maximum engagement with the mating material,