Hillman 3/8 in.-16 Zinc-Plated Steel USS Whiz Lock Nut, 100-Pack
SKU: 49921244738

Hillman 3/8 in.-16 Zinc-Plated Steel USS Whiz Lock Nut, 100-Pack

Sale price$16.19 Regular price$17.99
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Description

Hillman 3/8 in.-16 Zinc-Plated Steel USS Whiz Lock Nut, 100-Pack3 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, theyre ideal for securing 3 8 in. 16 coarse thread fasteners in demanding applications. Key Features: All Metal Construction: Withstands heavy vibration and shock without loosening Serrated Flange Locking: Ratchet tooth

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.


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

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

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.


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


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


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


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.


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.


Secure your projects with confidence—add this 100-pack of Hillman Whiz lock nuts to your cart 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: 49921244738

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Liz Newman
Port Orchard, US
★★★★★ 5
Comfortable and cool. Does not ride up.
Color: 01-multicolour (4-pack), Size: Medium
Extremely comfortable. Stays cool. Ample coverage. Quality material. They do not creep up. I ordered a medium which I generally take a size small. I have reordered and will reorder again to add more colors to my collection.
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Reviewed in the United States on May 18, 2026
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Janola
Alexandria, US
★★★★★ 5
Great Value for Cool Thigh Protection
Color: 02-multicolour (4-pack), Size: XX-Large
For the price, I'm not sure there are better women's boxer shortlettes anywhere. I've tried more expensive brands, and for quality and cooling, these are right up there. I have other bamboo viscose undies that still get gross when I get sweaty in the summer, but these, with the large mesh panel, really help wick away a lot of that moisture, keeping you feeling dryer and cooler. I find that the leg openings are comfortable and don't roll up! and the waist band doesn't dig, nor does it roll down. These do not provide any compression, and I wasn't looking for any. I just wanted some cooling, thigh protecting women's boxers that wouldn't break the bank. These are them! Bonus- I've washed them and put them in the dryer (following their instructions), and they haven't shrunk; they look about the same and are nice and soft.
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Reviewed in the United States on July 28, 2025
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Verified Purchase
Reviewer
Alexandria, US
★★★★★ 4
Great for the entire family but expensive
So far so good. The brand of boxers we had been buying changed their style and construction so we needed to find an alternative. These have held up well so far to multiple weeks of frequent washing and wearing from the entire family. We did size up from the usual 6/M we normally buy and ordered large to prevent the legs from rolling up which worked out great. Our daughter likes the length and how soft the fabric is for wearing under skirts and gym shorts and liners stay put without moving or leaking as another reviewer mentioned. Our son says they are comfortable and fit well being just supportive enough without being constrictive. We all agree that there seems to be not enough fabric in the back as they tend to be much tighter across the backside than the front and that also causes the waist band to ride lower in the back than the front. These have better seam placement than some brands we tried with no seam across the lady bits and no seam down the middle of the back side so they are more much comfortable but the cost is also much higher and that is why we're only giving it 4 stars. These will stay in the rotation until we find something cheaper that both us and the kids like.
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Reviewed in the United States on January 24, 2026
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Brittany
Waukegan, US
★★★★★ 5
Pregnant lady review! Soft, comfortable, cool.
Color: 03-multicolour (4-pack), Size: Large
So soft, comfortable and cool. I'm pregnant and I've gained weight in my legs. I love wearing dresses but my thighs were rubbing together too much. These are perfect to wear under dresses. I also wear them under my bibs at work and it keeps me from getting overheated but I don't have to worry about whether or not my underwear show since they just look like shorts. I wish these came in maternity. I just keep them below my belly. I'll be buying more for sure.
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Reviewed in the United States on April 8, 2026
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Janessa L.
Cuba, US
★★★★★ 5
I want to live in these
Color: 01-multicolour (4-pack), Size: Medium
I bought 4 different sets of new underwear. Unfortunately these came last. It’s unfortunate, because if they had come first I would have cancelled all my other orders or returned them and ordered more of these. I never want to wear anything else ever again; these are the comfiest undies I’ve ever owned, I want to live in them. I can wear them under pretty much anything except leggings or very tight pants (but let’s be honest, I don’t wear those anyway.) They are incredibly soft and breathable, they wash well, don’t roll, keep my thighs from rubbing, are comfy to sleep in, and the colors were true to the photo. Just a heads up, they are on the thin side and just a bit see through in the rear. I’m 5’5” 140lbs and the mediums fit perfectly, they go about mid-thigh.
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Reviewed in the United States on July 30, 2025

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