Flange bolts incorporate a built-in washer beneath the bolt head which assists in spreading the clamping force over a broader area. This “single-unit” configuration removes the requirement for an additional washer beneath the bolt head and is favored in certain situations as it tends to be more effective and simpler to handle. A washer remains necessary on the nut side unless a flange nut is utilized. The serrated edges beneath the flange dig into the surface, aiding in resisting loosening caused by vibrations.
Size: 1/4 inch-20 X 3/4 inch
Hex bolt with a serrated circular flange beneath the head
Flange removes need for separate washer
Serrations grip the surface and can assist in avoiding loosening
Intended for use with a nut (not included) or a threaded hole of identical diameter and thread size
