Serrated Flange Bolts 1/4in-20 X 1/2in Zinc Plated Case Hard Steel 25PK

Flange bolts feature a built in washer under the bolt head that helps to distribute the clamping load over a larger area. This "one-piece" design eliminates the need of a separate washer under the bolt head and is preferable for some applications as it can be more efficient and easier to use. A washer is still needed on the nut side unless using a flange nut. The serrations under the flange bite into the surface and help to resist loosening due to vibration.

• •Size: 1/4 inch-20 X 1/2 inch
• •Hex bolt with a serrated circular flange under the head
• •Flange eliminates need for separate washer
• •Serrations bite into surface and can help to prevent loosening
• •Designed for use with a nut (not included) or a threaded hole of the same diameter and thread size