Hillman 5/16 in. Zinc-Plated Steel USS Whiz Lock Nut, 100-Pack
SKU: 87169144133

Hillman 5/16 in. Zinc-Plated Steel USS Whiz Lock Nut, 100-Pack

Sale price$13.49 Regular price$14.99
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Description

Hillman 5/16 in. Zinc-Plated Steel USS Whiz Lock Nut, 100-Pack5 16 in. Zinc Plated USS Whiz Lock Nut (100 Pack) Secure assemblies with these Hillman USS Whiz lock nuts. Made from zinc plated steel for corrosion resistance, they feature integrated serrations that bite into the mating surface to resist loosening from vibration. Ideal for general construction, automotive, and machinery applications using 5 16 18 threads. Key Features: Vibration Resistance: Built in serrations provide strong locking action without

5/16 in. Zinc-Plated USS Whiz Lock Nut (100-Pack)

Secure assemblies with these Hillman USS Whiz lock nuts. Made from zinc-plated steel for corrosion resistance, they feature integrated serrations that bite into the mating surface to resist loosening from vibration. Ideal for general construction, automotive, and machinery applications using 5/16-18 threads.


Key Features:

  • Vibration Resistance: Built-in serrations provide strong locking action without separate washers
  • Durable Build: Zinc-plated steel resists rust and wear for indoor/outdoor use
  • USS Threading: 5/16-18 coarse threads for common fastening applications
  • Flange Design: Distributes load and helps protect mating surfaces
  • Bulk Value: 100-pack for jobsites, shops, and replenishing inventory

Specifications Table:

Specification Details
Pack Quantity 100
Thread Size 5/16-18 (USS coarse)
Type Whiz lock nut / Serrated flange lock nut
Material Steel
Finish Zinc-plated
Brand Hillman

Frequently Asked Questions (FAQ):

Q: What thread size are these nuts?
A: They are 5/16-18 (USS coarse thread).


Q: Do I need a separate lock washer?
A: No. The serrated flange provides the locking action, eliminating the need for a lock washer in most applications.


Q: Are these suitable for outdoor use?
A: Yes. The zinc plating offers corrosion resistance; for harsh or marine environments, consider stainless or higher-grade coatings.


Q: Can these be used with slotted or oversized holes?
A: The flange helps distribute load, but for oversized holes ensure proper washer or hardware as needed.


Q: What tools are required?
A: Install with a standard wrench or socket sized for the hex across flats.


Industrial Grip with a Clean, Polished Finish

This serrated flange nut adds a sleek, utilitarian note to hardware details, catching the light with its zinc sheen. I love how the integrated flange creates a crisp, purposeful silhouette while delivering serious hold. Style it on exposed hardware moments—think garage shelving or workshop fixtures—for a refined, engineered look. It’s a small luxury in the language of precision.


Lock in reliable hold—add this 100-pack of 5/16-18 zinc-plated Whiz lock nuts to your toolkit today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 87169144133

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Amazon Customer
Cuba, US
★★★★★ 5
No more scrolling. Best price, abundant, does its job.
Model: 36 Sqft, Model: 36 Sqft
I have it under the closed cell foam. It’s great. Just as great as Killmat and all the other butyl rubber products. Let me ask you to do something: look at the people who rated it 1 and 2 stars. No reviews. No pictures. Why? They don’t want to see the most budget friendly product getting sold. That’s some weak business. Rest assured you’ll be happy with this. Why did I buy both types? Butyl rubber helps the car not be a tin can. It keeps the outside road vibrations out. Closed cell phone keeps your music in. They work best together., Kumbaya, we have unity! We can get along, even in this age in time. The closed cell foam is cheap. You’ll get it to replace the nasty cloth under your carpet. Do the knock test. It won’t help. You need this too. And truth be told, I prefer that it has no name on it. I’m not paying money so you can brand yourself on my car. Ps: these products go on and don’t come off. Don’t mess up. It’s the same for the competitors and the closed cell foam. One shot. Do it right the first time. I’m writing this review after I used up my first box and am getting more. Happy returning customer.
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Reviewed in the United States on May 17, 2026
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G.C.B.
Houston, US
★★★★★ 5
Great stuff, well made.
Model: 36 Sqft
I was very pleased with this product. Very easy to use, flexible enough to conform to the variations of the surface (floor of the car and some side panels), and it stuck well. I topped it with a similar foam product to provide additional sound deadening. The car has not been run yet but the panels are much "quieter" when tapped on vs before with undercoating, felt and carpet. Seems well made and I expect no issues in the future.
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Reviewed in the United States on February 17, 2026
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Nick
Phoenix, US
★★★★★ 5
Great quality!
Model: 36 Sqft
Works amazing!! Same quality as the name brand stuff but significantly cheaper.
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Reviewed in the United States on May 19, 2026
N
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Nick
Louisville, US
★★★★★ 5
Good inexpensive sound deadening
Model: 36 Sqft
This stuff works great, it's easy to apply, sticky, easy to cut. 36 ft.² was enough to do the inside and outside of my doors the roof, the wheel wells and rear fenders. Plus, it's a lot cheaper than others.
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Reviewed in the United States on February 8, 2026
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Saif addeen hakouz
Fort Morgan, US
★★★★★ 5
Very good quality
Model: 36 Sqft
Very good quality, noticeable difference after installation. The sound deadening effect is clear, with a great reduction in road noise and vibrations. Installation was quick and easy.
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Reviewed in the United States on May 2, 2026

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