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HILLMAN 5/8 in. D X 8 in. L Heat Treated Zinc Steel Hex Head Cap Screw

Grade 5 strength and a zinc finish built to handle structural and machinery fastening jobs, not just light-duty repairs.
Hillman MPN 200393 In Stock & Ready to Ship
$134.99
Free shipping on orders over $149
Ships within 24 hours · most orders arrive in about 2 business days
Ships free on orders over $149 $14.99 flat shipping until your order reaches $149.

About Product Overview

This 8" hex head cap screw from Hillman is built for jobs that call for real holding strength. Graded 5, it's a step up from standard hardware-store screws, made for structural connections, machinery assembly, and equipment repair where the fastener actually needs to carry a load, not just hold two pieces together. The coarse thread engages fast and resists stripping in wood or softer materials, while the heat-treated zinc finish adds a layer of corrosion resistance so the screw holds up in garages, workshops, and outdoor-adjacent builds. Steel construction gives it the rigidity Grade 5 hardware is known for, and it comes boxed for easy stocking or resale.

  • Brand: Hillman
  • Grade: 5
  • Length: 8 inches
  • Head diameter: 5/8 inch
  • Material: Steel with heat-treated zinc finish
  • Thread type: Coarse

The Details Specifications

Brand Hillman
Model / MPN 200393
UPC 008236078312
Weight 19 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Hillman. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

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Authorized dealer · Hillman

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