3/8-16 x 5/8 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc 1 1/4-7 They have a 1/4" across

They have a 1/4" across the flats hex head and a 3/8" diameter shank

With a diameter of 10mm and a length of 90mm

It meets the specifications of ASTM F436 and is suitable for use with a variety of fasteners

our fender washer ensures a secure and professional finish

3/8-16 x 5/8 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc 1 1/4-7 They have a 1/4" acrossThe 3 8 16 x 5 8 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc is a versatile and durable fastener designed for a wide range of applications. It features a 3 8 16 thread size, a 5 8 inch head diameter, and a full thread length. The serrated hex flange washer provides a secure grip and prevents the screw from loosening due to vibration or movement. The case hardened zinc plating offers excellent corrosion resistance and durability,