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HILLMAN 5/8 in. D Zinc-Plated Low Carbon Steel Split Lock Washer 400 pc

A 400-count box of zinc-plated 5/8" split lock washers built to keep bolts from vibrating loose.
Hillman MPN 661305 In Stock & Ready to Ship
$63.99
Free shipping on orders over $75
Only 12 left
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

These 5/8" split lock washers from Hillman are built to keep bolted connections from working loose under vibration or repeated stress. Made from low carbon steel with a zinc-plated finish, they resist corrosion while holding up under everyday outdoor and indoor use. The split design bites into both the bolt head and mating surface, adding spring tension that helps maintain clamping force over time. Boxed in a 400-count pack, this is a practical bulk option for contractors, maintenance crews, or anyone running through fasteners on a regular basis.

  • Diameter: 5/8"
  • Material: Low carbon steel
  • Finish: Zinc-plated for corrosion resistance
  • Pack size: 400 count, boxed
  • Brand: Hillman

The Details Specifications

Brand Hillman
Model / MPN 661305
UPC 008236386905
Weight 10 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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01

Who's actually selling it

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02

Whether the warranty survives

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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

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