Hex Head Cap Screws Grade 8 Steel Plain (USA Made) 5/16-18 x 4 1/2
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Hex Head Cap Screws Grade 8 Steel Plain (USA Made) 5/16-18 x 4 1/2

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[50 PKG] Hex Head Cap Screws Grade 8 Steel Plain (USA Made) 5/16-18 x 4 1/2

Mutual ScrewSKU: 3172CH8PDBB
Price:
$72.02 $80.02per 50( $1.44 each)
Pieces 50
Measurement type Inch
Thread size 5/16-18
Diameter 5/16
Length 4-1/2
Material Steel
Grade Grade 8
Finish Plain
Head style Hex
Threads per inch 18
Thread style Partially Threaded
Weight 5.19 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

Hex Head Cap Screws Grade 8 Steel Plain (USA Made) 5/16-18 x 4-1/2" are engineered for high-torque assemblies where strength and reliability matter. Crafted from genuine Grade 8 steel and finished plain, these fasteners deliver exceptional durability for demanding applications. Made in the USA, they meet strict quality standards for consistent performance.

  • Material: Grade 8 steel for high tensile strength
  • Finish: Plain (uncoated) for versatile use and compatibility with coatings
  • Head style: Hex head designed for easy tightening with a standard wrench or hex socket
  • Thread size: 5/16-18 UNC
  • Length: 4-1/2 inches
  • Country of origin: USA-made

Applications

  • Automotive, machinery, and industrial equipment assemblies
  • Construction and heavy equipment projects
  • General mechanical fastening where high strength is required

Specifications

  • Thread size: 5/16-18 (UNC)
  • Head type: Hex
  • Material: Grade 8 steel
  • Finish: Plain (uncoated)
  • Overall length: 4-1/2 inches

Care and installation tips: Use a standard hex wrench or socket to achieve proper torque. Clean threads before installation and apply anti-seize lubricant if periodic disassembly is anticipated. Follow recommended torque specs for Grade 8 fasteners to ensure secure, long-lasting joints.

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

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