Skip to content
Shop Your Local Store Ship to Your Hometown Store
Pro & Contractor Accounts Apply for Net Terms
100,000+ Products Trusted Authentic Brands

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
Local Price Check i Local stores may price this as low as $120.99. Our online price is $134.99.
$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
UPC 008236078312
Case Pack Quantity 4 per case
Retail Unit Quantity 1
Dimensions (L × W × H) 5 × 9 × 4
Weight 19 lbs
Country of Origin TAIWAN
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to open the other tab. Everybody does. We'd rather say so than pretend otherwise — so open it. We'll wait.

When you're over there, check four things 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

We're not always the cheapest.

Sometimes you'll find it for less. Sometimes you'll find it for more. On a lot of brands the number is identical everywhere it's sold legitimately — the manufacturer sets a minimum advertised price and every authorized dealer holds it. When a price sits well under that, it's worth asking why before it's worth celebrating.

How pricing actually works
Authorized dealer · Hillman

Or skip both tabs and buy it down the street. Find a store near you →

Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare