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Hillman

Hillman 5/16 in. Zinc-Plated Steel Split Lock Washer, 100-Pack

Hillman 5/16 in. Zinc-Plated Steel Split Lock Washer, 100-Pack

Regular price $5.04 USD
Regular price Sale price $5.04 USD
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5/16 in. Zinc-Plated Split Lock Washers (100-Pack)

Durable steel split lock washers designed to keep nuts and bolts from loosening due to vibration or corrosion. The zinc-plated finish offers moderate rust resistance for indoor and outdoor projects. Sized for 5/16 in. fasteners and packaged in a convenient 100-pack.


Key Features:

  • Secure Fastening: Split design bites into mating surfaces to resist loosening from vibration
  • Corrosion Protection: Zinc-plated finish provides moderate rust resistance for indoor/outdoor use
  • Durable Construction: Made from steel for strength and long-lasting performance
  • Sized for 5/16 in. Hardware: Fits bolts and nuts of matching diameter
  • Bulk Value Pack: 100 washers per box for jobs of any size

Specifications Table:

Specification Details
Material Steel
Finish Zinc-Plated
Diameter 5/16 in.
Product Type Split Lock Washer
Number in Package 100 pk
Packaging Type Boxed
Unit of Measurement Metric
California Prop 65 Warning Yes
Package Weight 0.43 lb
Package Length 2.55 in
Package Width 2.5 in
Package Height 1.7 in
Manufacturer Part Number (MPN) 300021

Frequently Asked Questions (FAQ):

Q: What size bolts do these washers fit?
A: They are designed for 5/16 in. diameter bolts and nuts.


Q: Are they suitable for outdoor use?
A: Yes. The zinc-plated finish offers moderate corrosion resistance for outdoor applications.


Q: What is the material?
A: Steel with a zinc-plated finish.


Q: How do split lock washers work?
A: The split ring applies spring tension and bites into the mating surface under a nut, helping prevent loosening from vibration.


Q: How many come in a pack?
A: 100 washers per pack.


A Small Detail with Big Impact

These zinc-sheathed split lock washers bring quiet confidence to hardware—sleek, minimal, and purpose-built. Their clean, circular profile and subtle sheen complement contemporary fixtures while ensuring connections stay taut. Style them with matching zinc or galvanized bolts for a cohesive, refined look in visible installations. A smart, polished essential for projects that demand both performance and poise.


Secure your projects with reliable, corrosion-resistant fastening—add this 100-pack of Hillman split lock washers to your cart today.

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