SKU: 58263404600

Hillman 5/16-18 x 3 in Stainless Steel Hex Head Cap Screw, 50-Pack

Sale price$56.69 Regular price$62.99
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Description

Hillman 5/16-18 x 3 in Stainless Steel Hex Head Cap Screw, 50-PackStainless Steel Hex Head Cap Screw, 5 16 18 x 3 in (50 Pack) Durable 18 8 stainless steel hex head cap screws built for high torque fastening in tapped holes or with a nut. Coarse 5 16 18 threads and a washer face under the head deliver secure, leak resistant clamping for indoor and outdoor projects. Key Features: Corrosion Resistant Stainless Steel: 18 8 grade resists rust for outdoor and marine applications High Torque Hex Head: Machine threads and

Stainless Steel Hex Head Cap Screw, 5/16-18 x 3 in (50-Pack)

Durable 18-8 stainless steel hex head cap screws built for high-torque fastening in tapped holes or with a nut. Coarse 5/16-18 threads and a washer face under the head deliver secure, leak-resistant clamping for indoor and outdoor projects.


Key Features:

  • Corrosion-Resistant Stainless Steel: 18-8 grade resists rust for outdoor and marine applications
  • High-Torque Hex Head: Machine threads and hex cap enable strong, reliable tightening with wrench or drill
  • Washer Face Seal: Integrated bearing surface under the head improves load distribution and sealing
  • USS Partially Threaded Shank: Provides alignment and shear strength where full thread isn’t needed
  • Bulk Value: 50 pieces per retail pack for jobsite or workshop stock

Specifications Table:

Specification Details
Size 5/16-18 x 3 in
Thread Type Coarse (USS)
Material 18-8 Stainless Steel
Head Type Hex head cap screw
Shank Partially threaded
Washer Face Under-head bearing surface for better seal
Number in Package 50
Packaging Type Boxed
Use For tapped holes or with a nut; tighten with wrench or drill

Frequently Asked Questions (FAQ):

Q: What thread size are these screws?
A: They are coarse 5/16-18 machine-thread hex head cap screws.


Q: Are they fully threaded?
A: No. They are USS style with a partially threaded shank for added strength and alignment.


Q: Can these be used outdoors?
A: Yes. The 18-8 stainless steel provides excellent corrosion resistance for outdoor and damp environments.


Q: Do they require washers?
A: They feature a washer face under the head for improved sealing, but separate washers can be added if needed for specific applications.


Q: How are they installed?
A: Tighten with a wrench or a drill into a tapped hole or use with a matching 5/16-18 nut.


Sleek Stainless Fasteners with Architectural Poise

These polished hex cap screws bring a refined industrial edge to cabinetry, hardware, and exposed joinery. The crisp hex head and elongated shank create a clean, linear statement while the stainless sheen elevates everyday fixtures. Style them with brushed steel brackets or contrast against matte black frames for a tailored, modern look. A quiet essential, they deliver strength and sophistication in one elegant detail.


Stock your project with this 50-pack of corrosion-resistant hex cap screws for dependable, clean-lined fastening anywhere you need it.

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: 58263404600

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Ken Hill
Massapequa, US
★★★★★ 5
helped treat my sore neck
Color: White-cooling Basic, Size: Camping Pillow(Pack of 1)
This pillow — after dialing in the right amount of shredded foam — has greatly helped my sore neck. Initially, I had to remove some foam. Then I gradually added foam until it reached optimum comfort and support. It is also CPAP-friendly — especially when I position my head near the pillow's edge. (I am a left-side sleeper.) I like the travel size because I use a bulky hugging pillow to ease stress on my shoulder and elbow. That makes my side of the bed feel cramped if using a larger head pillow. A smaller pillow is easy to flip end-to-end in the middle of the night. I have spent lots of money on pillows over the years, but this is the best I've ever had for relieving [1] neck pain and [2] CPAP mask seal problems. Very comfortable, supportive, and affordable. I did not notice any unpleasant smell — and I am usually sensitive to that kind of thing. Would highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
M
Verified Purchase
Molly Farrell
Lexington, US
★★★★★ 5
Love them!
Color: White-cooling Basic, Size: Queen(Pack of 2)
Love them! After 10 years with our MyPillows, they finally lost their fluff. The reviews I read of the MyPillows of today were not good; they didn’t have as much filling as they used to. These pillows remind me of how fluffy our new MyPillows were 10 years ago!! You sink right into them and can mush them however and they stay. These are way cheaper than the Coop and it’s the same concept; add or remove the filling as needed. The cooling side is a huge plus too! You won’t be disappointed with these pillows!
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Reviewed in the United States on May 22, 2026
D
Verified Purchase
Donna Bohn
Los Angeles, US
★★★★★ 5
Best pillow ever!
Size: King (2 Pack)
I love this pillow. I like a softer pillow and my partner prefers a firmer pillow. With these pillows you can adjust it to the comfort level you desire. For mine I took out quite a bit of the shredded memory foam (I call it fluff). I took out one 13 gallon trash bag of the fluff. After I slept on my pillow for a couple of weeks I found it was getting to soft so I took my saved bag of fluff and added it into the pillow. Now it's PERFECT! The cooling side works great. When you lay your head down on it you can feel the cool pillow. Helps falling a sleep easier. I would highly recommend this pillow!
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Reviewed in the United States on May 3, 2026
S
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Sindy chicas
Boise, US
★★★★★ 5
Great Pillows for a Good Night’s Sleep
Size: Queen (2 pack), Size: Queen (2 pack)
These pillows are very comfortable and supportive. They keep their shape well and provide great neck and head support throughout the night. The material feels soft and high quality, and they helped improve my sleep. I wake up without neck pain and feel well rested. Definitely worth it.
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Reviewed in the United States on January 25, 2026
M
Verified Purchase
michelle morris
Omaha, US
★★★★★ 5
Great quality for the price
Size: Queen (2 pack)
Wow! For the cost...these pillows are amazing! Comfortable, soft, supportive, and adjustable to your specific needs. Highly recommend, I would buy them again! 10/10
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Reviewed in the United States on May 22, 2026

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