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HILLMAN 5/16 in. D X 5-1/2 in. L Zinc Plated Steel Hex Bolt 50 pk

HILLMAN 5/16 in. D X 5-1/2 in. L Zinc Plated Steel Hex Bolt 50 pk

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Support American manufacturers + independent hardware retailers in one purchase.

Hillman 5/16 in. D x 5-1/2 in. L Zinc Plated Steel Hex Bolts, packaged in a convenient 50-pack, are the go-to fasteners for reliable, everyday assembly. Crafted from sturdy steel a…

Hillman MPN 190129 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $39.99. Our online price is $44.99.
$44.99
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About Product Overview

Hillman 5/16 in. D x 5-1/2 in. L Zinc Plated Steel Hex Bolts, packaged in a convenient 50-pack, are the go-to fasteners for reliable, everyday assembly. Crafted from sturdy steel and finished with a zinc plating, these Grade 2 hex bolts deliver solid strength with extra corrosion resistance for a wide range of projects.

  • 5/16" diameter with a 5-1/2" length; zinc plated for durable protection against corrosion in typical indoor and sheltered outdoor environments.
  • Material and grade: Steel construction with Grade 2 precision, ideal for general-purpose fastening, furniture assembly, and light construction.
  • Thread type: Coarse threads provide strong bite in wood and soft metals, ensuring quick alignment and secure clamping.
  • Head details: Hex head with a 5/16" head diameter—designed for easy driving with standard wrenches or sockets.
  • Packaging: Boxed, with 50 bolts per package for bulk projects and ongoing maintenance tasks.

Ideal applications include furniture assembly, shelving units, framing and framing-related hardware, deck components, cabinetry, and general repairs where a sturdy, economical fastener is needed. Because of the coarse thread and common size, it pairs well with standard nuts and washers to create a secure, lasting connection between wood-to-wood, wood-to-metal, or metal-to-metal assemblies.

Why choose these zinc-plated hex bolts? They balance cost and performance for everyday projects. The zinc finish offers a practical layer of corrosion resistance without sacrificing ease of installation, making them a reliable option when stainless or coated fasteners aren’t necessary. They aren’t meant for extreme outdoor exposure or high-stress structural uses, but they excel in most home improvement tasks and light construction.

Pro tips for installation:

  • Coordinate with matching hex nuts and flat washers for a clean, load-distributing joint.
  • Pre-drill pilot holes in hardwoods to prevent splitting and ensure smooth threading.
  • Use the appropriate size driver or socket to avoid rounding the hex head; torque to a firm, snug fit without over-tightening.
  • Store the boxed 50-pack in a dry, organized space to prevent loss and corrosion over time.

The Details Specifications

Brand Hillman
SKU 57027
UPC 008236074734
Unit 0
Case Pack Quantity 2 per case
Retail Unit Quantity 1
Unit of Measure 50 BX
Dimensions (L × W × H) 7 × 5 × 3
Weight 7 lbs
Cubic Feet 0.1016 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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