Hillman 3/8 in. Diameter x 4 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screw, 50-Pack
SKU: 37040353714

Hillman 3/8 in. Diameter x 4 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screw, 50-Pack

Sale price$73.79 Regular price$81.99
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Description

Hillman 3/8 in. Diameter x 4 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screw, 50-PackHillman Grade 8 Hex Head Cap Screws, 3 8" x 4", 50 Pack Heavy duty hex head cap screws made from heat treated Grade 8 steel for superior strength and wear resistance. Partially threaded with a washer face under the head for a secure seal, ideal for fastening into nuts or tapped holes. Coarse thread design ensures reliable assembly in demanding applications. Key Features: Grade 8 Strength: Heat treated steel delivers high tensile performance for heavy

Hillman Grade 8 Hex Head Cap Screws, 3/8" x 4", 50-Pack

Heavy-duty hex head cap screws made from heat-treated Grade 8 steel for superior strength and wear resistance. Partially threaded with a washer face under the head for a secure seal, ideal for fastening into nuts or tapped holes. Coarse thread design ensures reliable assembly in demanding applications.


Key Features:

  • Grade 8 Strength: Heat-treated steel delivers high tensile performance for heavy-duty projects
  • Washer Face Seal: Built-in washer face under the head helps create a better seal
  • Partially Threaded Shank: Provides alignment strength with threaded grip where it counts
  • Corrosion-Resistant Finish: Yellow dichromate coating enhances durability and wear resistance
  • Multipack Convenience: Boxed 50-pack for jobsite or shop efficiency

Specifications Table:

Specification Details
Diameter 3/8 inch
Length 4 inch
Material Steel
Finish Heat-treated yellow dichromate
Grade Grade 8
Head Type Hex head with washer face
Thread Type Coarse
Threading Partially threaded
Number in Package 50
Packaging Type Boxed
Use For use with a nut or in a tapped hole; tighten with wrench or drill

Frequently Asked Questions (FAQ):

Q: Are these fully threaded?
A: No. They are partially threaded along the shank.


Q: What tools are needed for installation?
A: Tighten with a wrench or a compatible drill/driver and hex socket.


Q: What thread type do these bolts use?
A: Coarse thread.


Q: Can these be used with nuts or tapped holes?
A: Yes. They are designed for use with a nut or in a properly tapped hole.


Q: What is the diameter and length?
A: 3/8 inch diameter and 4 inch length.


Industrial Polish with Uncompromising Strength

These Grade 8 cap screws bring a refined industrial character to custom builds, pairing a clean hex silhouette with a luminous yellow dichromate finish. The partially threaded shank offers a tailored, architectural look while maximizing performance. Style them with exposed hardware on thick timber or steel frames for a confident, modern edge. A must-have detail that elevates craftsmanship and durability in any luxe workspace or loft setting.


Choose Hillman Grade 8 cap screws for reliable, high-strength fastening—perfect for your next heavy-duty build.

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: 37040353714

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Heather R.
Omaha, US
★★★★★ 4
Longer Lasting than most things I've tried
Size: 1 Count (Pack of 16)
I bought these to go on the PetSafe Bouncy Bone which I had bought for my Australian Shepherd/Vizsla mix puppy who chews everything. We had gone through so many "long-lasting" chew toys/bones that really lasted only about 10 minutes and I was looking for something to occupy his time a little longer. These do the trick. Although they still don't last super long, they take a little more effort and keep him distracted a bit longer than anything else edible that I've tried. To me they are a bit pricey, so I try to make them last by only putting one on at a time, instead of one on each end of the toy. I also tighten the ends pretty tight to make it more difficult for him to get at the entire ring. If you don't mind the price, these are an easy and convenient way to keep your dog busy.
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Reviewed in the United States on June 29, 2015
B
Verified Purchase
900 Buzzard
Belleville, US
★★★★★ 5
Dog treats
Size: 1 Count (Pack of 16)
Keeping our granddog busy and teeth clean
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Reviewed in the United States on December 8, 2025
D
Verified Purchase
D Olson
Louisville, US
★★★★★ 5
Keeps pet busy
Size: 1 Count (Pack of 16)
Must have for Busy Buddy Bones. Keeps them busy. Durable and must taste great. I keep these on my subscribe and save. I have never noticed any smell or mess with these, unlike some other rawhides.
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Reviewed in the United States on July 21, 2024
D
Verified Purchase
Donna Valentine-Jones
Grantham, US
★★★★★ 5
PetSafe Busy Buddy Refill Ring Dog Treats
Size: 1 Count (Pack of 16)
Great! My Baby Pearl Anne loves them. And, she won't normally play with anything else. The Vet says it's due her being in a HORRIBLE Puppy Mill. She never had a puppyhood. She is still Neurotic, even after having been her parent for over 4 years. I would definitely like to get my hands on these people, if I knew who they were. She was found her on a VERY busy intersection way up north in the Texas town where I live. I don't normally go in this neighborhood, so I didn't see her on the street. My best friend, who died just 4 years ago on the 18th of March, had a ex coworker. Leslie(my best friend),KNEW I wanted a dog. I fell in love with her dog: a Miniature Schnauzer. One day Leslie's coworker called her. She said they had found a dog on the street. The coworker said that she couldn't keep anymore dogs. She has 3. So, when they described her, I knew I wanted her! She's a rare pure white Miniature Schnauzer. She was skinny, shaking, with horribly matted hair. She was scared to death, and freezing to death. I put her in a towel, and took her the Vet. And, she said she had worms, was dehydrated, and malnourished. not anymore. She's my baby, my child. Who is now spoiled to death. Sorry this is so long, but, I really needed to tell her story. Donna Valentine-Jones.
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Reviewed in the United States on March 24, 2015
J
Verified Purchase
Jenny
San Leandro, US
★★★★★ 3
Sometimes they arrive chewy and great, other times stale and hard as a rock!
Size: 1 Count (Pack of 16)
My dog loves these added to her toys, but alot of time they arrive hard as a rock.
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Reviewed in the United States on December 26, 2025

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