Prime-Line 9091178 Serrated Flange Bolts, 3/8 in.-16 X 1-1/4 in., Zinc Plated Case Harden (25 Pack)

Prime‑Line flange bolts provide strong, secure fastening with built‑in load distribution for a wide range of home repair and improvement projects. Designed with an integrated flange beneath the bolt head, these bolts help spread clamping force evenly, reducing the need for a separate washer and helping protect surfaces from damage. Ideal for automotive repairs, appliances, furniture assembly, lawn and garden equipment, and general mechanical applications, Prime‑Line flange bolts are intended for use with same‑size matching nuts to ensure proper fit and dependable holding power. Manufactured from quality materials for strength and durability, they install easily using standard tools and perform reliably in both indoor and outdoor environments. Trusted by DIY homeowners and professionals across the U.S., Prime‑Line flange bolts make it easy to achieve secure, efficient fastening with fewer parts and confidence.

• Size: 3/8 inch-16 X 1-1/4 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