[250 PKG] Flange Bolts Serrated Hex Washer Case Hardened Zinc 3/8-16 X 3 1/2

Flange Bolts Serrated Hex Washer Case Hardened Zinc 3/8-16 x 3 1/2 are engineered for high-strength fastening with built-in load distribution and secure, vibration-resistant performance. Featuring a serrated hex washer and a durable zinc finish, these bolts deliver reliable performance in demanding applications.

Product Features

• Material: Case-hardened steel with a zinc coating for enhanced durability and corrosion resistance.
• Head style: Flange bolt with an integrated hex washer to distribute clamping force over a larger area.
• Thread size: 3/8-16 UNC for strong, standard coarse-thread engagement.
• Length: 3 1/2 inches, suitable for various mounting depths.
• Finish: Zinc plating provides long-lasting protection against rust and wear.
• Locking/Seating: Serrated hex washer helps resist loosening and provides a secure seating surface.

Specifications

• Thread: 3/8-16 UNC
• Length: 3 1/2 inches
• Material: Case-hardened steel
• Finish: Zinc
• Head type: Flange with integrated hex washer

Why Choose These Bolts

Ideal for automotive, machinery, and equipment assemblies where secure fastening and load distribution are essential. The flange design spreads torque over a larger surface, while the serrated washer minimizes loosening under vibration. The case-hardened steel and zinc coating deliver strength and corrosion resistance for long-term reliability.