Thread Size: 3/8"-16; Thread Pitch: 16 TPI; Thread Type: Coarse Thread are the industry standard
Package include: 8 PCS; Hex Drive Size: 9/16"
Material: 304 stainless steel 18-8 with special black appearance, greater strength and better corrosion resistance performance than regular stainless steel or zinc plated fasteners. No scratches, No Burrs. Excellent black appearance
Thread Length: 2-1/2 inch; Head Height: 0.24 inch
Hex bolts generally require flat & lock washers to evenly distribute the pressure from the head and the nut. You could find the matched hex nut and flat & lock washers in our store.