[400 BULK] Flange Bolts Serrated Hex Washer Case Hardened Zinc 5/16-18 X 2 3/4
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[400 BULK] Flange Bolts Serrated Hex Washer Case Hardened Zinc 5/16-18 X 2 3/4

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[400 BULK] Flange Bolts Serrated Hex Washer Case Hardened Zinc 5/16-18 X 2 3/4

Mutual ScrewSKU: 3144MWWKC
Price:
$214.79per 400( $0.54 each)
Pieces 400
Measurement type Inch
Thread size 5/16-18
Diameter 5/16
Length 2-3/4
Material Steel
Finish Zinc Plated
Head style Serrated Hex Washer
Threads per inch 18
Thread style Fully Threaded
Weight 25.0 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Durable flange bolts designed for high-strength, corrosion-resistant fastening, the Flange Bolts Serrated Hex Washer Case Hardened Zinc 5/16-18 x 2-3/4 deliver reliable performance in automotive, machinery, and construction projects. The combination of a hex washer head and serrated flange provides a robust bearing surface and anti-slip performance under vibration.

Product Highlights

  • Material & Finish: Case-hardened steel with a durable zinc coating for corrosion resistance and extended service life.
  • Size & Threads: 5/16-18 thread pitch, standard coarse threads for quick, secure engagement.
  • Length: 2-3/4 inches overall length for strong clamping in thick panels or components.
  • Head & Drive: Hex washer flange head provides a large bearing surface and flush seating.
  • Grip & Vibration: Serrated flange minimizes loosening from vibration and reduces the need for lock washers.

Why Choose These Bolts

Designed to withstand demanding environments, these bolts combine strength, corrosion resistance, and secure seating. The integrated flange and serrations bite into surfaces to prevent rotation and pull-through, while the zinc finish protects against rust in indoor and outdoor installations.

Specifications

  • Finish: Zinc-coated
  • Material: Case-hardened steel
  • Size: 5/16-18
  • Length: 2-3/4 in
  • Head Type: Hex washer flange

Applications

  • Automotive assemblies
  • Industrial machinery
  • Construction and HVAC equipment
  • Equipment mounting and panel fastenings

Upgrade your hardware kit with these reliable flange bolts and enjoy steady, secure performance across a wide range of projects.

Can We Help?

If you’re not sure that this product is right for you, give us a call!
800-222-0324

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