3/8 in.-16 Zinc-Plated USS Whiz Lock Nut (100-Pack)

These Hillman Whiz lock nuts feature an all-metal, serrated flange design that resists loosening under vibration. Made of zinc-plated steel for moderate corrosion resistance, they’re ideal for securing 3/8 in.-16 coarse-thread fasteners in demanding applications.

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Key Features:

• All-Metal Construction: Withstands heavy vibration and shock without loosening
• Serrated Flange Locking: Ratchet-tooth underside bites into material for a secure hold
• 3/8 in.-16 USS Coarse Thread: Fits standard 3/8 in.-16 bolts and rods
• Zinc-Plated Steel: Provides durable strength with moderate rust resistance
• Bulk Pack Convenience: 100 pieces for jobsite or shop replenishment

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Specifications Table:

Specification	Details
Thread Size	3/8 in.-16 USS coarse
Material	Steel
Finish	Zinc-plated
Design	All-metal, free-spinning nut with serrated flange (ratchet tooth underside)
Pack Quantity	100 pieces per retail package
Brand	Hillman
Product Type	Whiz Lock Nut
Hillman Item Number	180398

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Frequently Asked Questions (FAQ):

Q: What bolt size do these nuts fit?
A: They are 3/8 in.-16 USS coarse thread and fit standard 3/8 in.-16 bolts or threaded rods.

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Q: Do I need a washer with these?
A: Typically no—the integrated serrated flange spreads the load and helps prevent loosening.

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Q: Are these reusable?
A: Yes, the all-metal serrated design is reusable and maintains locking performance when properly installed.

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Q: Can they be used outdoors?
A: The zinc plating offers moderate corrosion resistance; for harsh or marine environments, consider higher corrosion-resistant finishes.

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Q: How are they installed?
A: Thread onto a matching 3/8 in.-16 bolt and tighten with a compatible wrench; the serrations should face the mating surface.

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Industrial Grip With Polished Poise

This serrated flange nut brings a refined, utilitarian edge to any project—its sculpted ratchet detailing is as striking as it is functional. I love the subtle sheen of the zinc finish, which catches light like jewelry for your hardware. Style it with exposed fasteners on custom shelving or mixed-metal furniture for a crisp, engineered look. It’s a small luxury that delivers big on stability and sophistication.

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Secure your projects with confidence—add this 100-pack of Hillman Whiz lock nuts to your cart today.