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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★★★★★ 5
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Excellent AC and Heater Cabinet odor defense air filter. I noticed immediately the smell coming out of the vents was fresher and the musty smell that was coming from the vents was crisper and cleaner. Very easy installation that you can do yourself and don’t need to pay a shop to do. The price is one of the best online and coms in quickly. It’s very sturdy, filter quality is excellent and it definitely improves the air quality and flow in your car. Fits perfectly like any OEM filter, this is a great buy for the price of an installation that will take you Les then 10 minutes to do yourself.
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Reviewed in the United States on May 21, 2026
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Khaleesi
West Palm Beach, US
★★★★★ 5
Great filter and easy installation
Style: BE-159 1-Pack, Style: BE-159 1-Pack
For my 2016 Hyundai Sonata Hybrid Limited. I cannot believe I paid so much more for a brand-name filter that does the same thing as this one. It is made of the same material as the dealer one I took out. Very easy to install, cant believe I paid for this to be done in the past with oil changes. Requires no tools and did not get dirty at all. No mechanical skills needed, especially if you run into trouble and can use YouTube. PROS - great quality, cannot tell that it is after-market - very professionally made, not irregularities seen - excellent fit in position, no adjustment needed - very easy to install, cannot believe I paid to have this done in the past - no mechanical skills needed to install - great price compared to what big name productions want for the same thing - cannot tell the difference in air quality between this and the dealer filter I took out - removes outside odor completely - did not require tools are getting dirty CONS - None
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Reviewed in the United States on May 30, 2026
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JimXeod
Pawtucket, US
★★★★★ 5
Fits perfect and works as designed. Flows like OEM and looks well made.
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Reviewed in the United States on May 15, 2026
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S. Phillips
Carnegie, US
★★★★★ 4
Good quality but it was slightly longer than original and needed modification.
Style: BE-182 1-Pack
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Reviewed in the United States on May 8, 2026
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Keith Granholm
Lexington, US
★★★★★ 5
Fits my Chevy 2021 Bolt Premier perfectly.
Style: BE-966 1-Pack
Installation was a breeze, fir nicely and the air in teh car now smells fresh and clean. The old filter has developed a musty smell so this new one is great. Had it replaced in under 3 minutes.
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