Prime-Line 9090665 Serrated Flange Bolts, 1/4 In.-20 X 1 In., Zinc Plated Case Hardened (25 Pack)

Key features

• Size: 1/4 inch-20 X 1 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
• Thread Type: Coarse, Thread Class: UNC-2A, Point Style: Blunt
• Specification(s) Met: ASME B18.2.1, ASME B18.6.3, and ASME B1.1

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.

Free shipping included. 30-day hassle-free returns.