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HILLMAN 1 in. D X 3-1/2 in. L Heat Treated Steel Hex Head Cap Screw 10 pk

HILLMAN 1 in. D X 3-1/2 in. L Heat Treated Steel Hex Head Cap Screw 10 pk

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

When reliability matters in heavy-duty assemblies, Hillman 1 in. D x 3-1/2 in. L Heat Treated Steel Hex Head Cap Screw is ready to bite into metal with precision and staying power.…

Hillman MPN 220468 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $98.99. Our online price is $109.99.
$109.99
Includes free shipping on orders over $75 · $8.99 standard below
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About Product Overview

When reliability matters in heavy-duty assemblies, Hillman 1 in. D x 3-1/2 in. L Heat Treated Steel Hex Head Cap Screw is ready to bite into metal with precision and staying power. Built from heat-treated steel and rated Grade 8, this fastener is designed to withstand high loads, resist wear, and maintain torque under vibration.

Key specifications at a glance:

  • Head diameter: 1 in
  • Length: 3-1/2 in
  • Material: Steel
  • Finish: Heat treated
  • Grade: 8
  • Thread type: Coarse
  • Package: 10 count, boxed
  • Product type: Hex head cap screw

Why choose heat-treated Grade 8 hex head cap screws?

  • Superior tensile strength and hardness for critical applications, such as machinery frames, equipment mounts, and heavy-duty shelving supports.
  • Coarse threads provide reliable engagement and faster assembly in metal with standard tapped holes or with nuts, especially where quick, strong fastening is needed.
  • 1-inch hex head size accepts standard wrenches and sockets, delivering solid torque transfer without cam-out on demanding jobs.
  • Each screw ships boxed in a convenient 10-pack, making it easy to stockpile for multi-step projects or maintenance kits.

Ideal use cases

  • Machinery mounting bolts and frame joints where maximum load-bearing capability is required.
  • Industrial shelving, equipment enclosures, and workshop hardware that sees constant vibration.
  • Automotive or trailer assemblies where precise, high-strength fasteners are essential.

Practical tips for best results

  • Pair with compatible Grade 8 nuts and flat washers for a secure, load-distributing connection.
  • Apply a light thread lubricant to ease installation and reduce galling, especially in repetitive assemblies.
  • For vibration-prone setups, consider thread locking compound or lock washers to maintain torque over time.

The Details Specifications

Brand Hillman
SKU 54799
UPC 008236083095
Unit 0
Case Pack Quantity 2 per case
Retail Unit Quantity 1
Unit of Measure 10 BX
Dimensions (L × W × H) 7 × 5 × 3
Weight 11 lbs
Cubic Feet 0.1016 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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