SKU: 31244188240

Hillman 5/16-18 x 3-1/2 in Stainless Steel Hex Head Cap Screw, 50-Pack

Sale price$64.79 Regular price$71.99
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Description

Hillman 5/16-18 x 3-1/2 in Stainless Steel Hex Head Cap Screw, 50-PackStainless Steel Hex Head Cap Screw, 5 16 18 x 3 1 2, 50 Pack Durable 18 8 stainless steel hex head cap screws for high torque fastening in tapped holes or with nuts. Coarse, partially threaded shank with washer face under the head delivers a secure seal and corrosion resistance for indoor outdoor projects. Key Features: Corrosion Resistant Stainless Steel: 18 8 stainless steel for long lasting performance in outdoor and marine environments High Torque

Stainless Steel Hex Head Cap Screw, 5/16-18 x 3-1/2, 50-Pack

Durable 18-8 stainless steel hex head cap screws for high-torque fastening in tapped holes or with nuts. Coarse, partially threaded shank with washer face under the head delivers a secure seal and corrosion resistance for indoor/outdoor projects.


Key Features:

  • Corrosion-Resistant Stainless Steel: 18-8 stainless steel for long-lasting performance in outdoor and marine environments
  • High-Torque Hex Cap Head: Hex head with machine threads supports strong, reliable tightening with a wrench or drill
  • Washer Face Under Head: Built-in washer face helps create a better seal and distribute load
  • Partially Threaded (USS): Coarse threads with a solid shank for strength where shear resistance matters
  • Bulk 50-Pack: Convenient boxed pack for jobs requiring multiple fasteners

Specifications Table:

Specification Details
Brand Hillman
Type Hex head cap screw
Diameter / Thread Pitch 5/16-18
Length 3-1/2 inch
Material 18-8 Stainless Steel
Thread Type Coarse
Thread Coverage Partially threaded (USS)
Head Feature Washer face under head
Finish Stainless steel
Number in Package 50
Packaging Type Boxed
Installation Tighten with wrench or drill
Package Dimensions (HxWxL) 2 in x 3.5 in x 4.5 in
Package Weight 3.3 lb

Frequently Asked Questions (FAQ):

Q: Are these fully threaded?
A: No. They are USS partially threaded along the shank with coarse machine threads.


Q: What tools are recommended for installation?
A: Tighten with a wrench or a drill using an appropriate hex socket.


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


Q: Do they have a built-in washer?
A: They feature a washer face under the head to improve sealing and load distribution.


Q: What size are these screws?
A: 5/16-18 thread diameter/pitch and 3-1/2 inch length.


Sleek, Industrial Fastening with Enduring Stainless Poise

These stainless hex cap screws bring a crisp, tailored precision to any build, marrying function with a polished industrial aesthetic. The subtle washer face and clean shank lines create a refined detail that elevates cabinetry, fixtures, and custom metalwork. Style them with brushed steel hardware and natural woods for a modern, textural contrast. A staple of luxurious craftsmanship, they deliver performance and poise in equal measure.


Upgrade your project with these corrosion-resistant stainless hex cap screws—order the 50-pack today for dependable, high-torque fastening.

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: 31244188240

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4.8 ★★★★★
Based on 232 reviews
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Product Reviews
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SAM
Boise, US
★★★★★ 5
My dogs favorite toy so far in two years
Color: C) 4" 2-Pack (Bacon)
I use this with my medium sized dog. These are large for him but that's what I want so I don't ever have to think about them being too small or a swallow hazard. He has been through A LOT OF TOYS in the last couple years, but nothing, NOTHING has he loved as much as these. His favorite used to be squeaker balls. Then his favorite was crackle balls. But he will gladly ignore both for this one. I don't know if it's the bacon flavor or what, but he go nuts for it.
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Reviewed in the United States on May 5, 2026
K
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Kathy
Cuba, US
★★★★★ 5
Works well, tough
Held the bully stick firmly for my crazy aggressive pit bull lab mix. It's very heavy though. When she starts throwing it around you can really hear it. She also hasn't destroyed it. Worth the money.
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Reviewed in the United States on January 13, 2026
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Kim
Massapequa, US
★★★★★ 5
Great gadget!
This little gadget is a lifesaver! Holds bully sticks perfectly! Buy it! My pup enjoys using it and is easy to hold.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2026
A
Verified Purchase
Alibill
Fort Morgan, US
★★★★★ 5
It absolutely holds a bully or collagen sticks in place!
This actually works! I was skeptical that it could hold a treat but it does hold my Aussies collagen sticks in place so he doesn’t just try to swallow them. It is pretty heavy too.
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Reviewed in the United States on October 21, 2025
R
R. Reviews
Cuba, US
★★★★★ 4
Solid Build, But Not German Shepherd-Proof
I bought this bully stick holder for my German Shepherd, who is an aggressive chewer and has a talent for demolishing toys in minutes. The design is sturdy, and the material feels genuinely heavy-duty — no issues with cracks or breakage so far. However, the biggest problem I’ve run into is that the bully stick doesn’t always stay securely in place. My dog is strong and smart, and within a few minutes, he can twist or yank the stick loose and start chomping on the whole thing, which defeats the safety purpose. I’ve tried adjusting how I insert the stick, but it doesn’t always hold firm, especially with thinner bully sticks. That said, it does work better with thicker, straight sticks, so I’d recommend it if your pup isn’t quite as determined (or stubborn!) as mine. I still use it under supervision, and it slows him down a bit, but I was hoping for a more secure grip. Great idea and solid quality — just wish it was more GSD-proof.
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Reviewed in the United States on July 13, 2025

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