Hillman 3/8 in. Diameter x 2-1/4 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screw, 50-Pack
SKU: 15850947782

Hillman 3/8 in. Diameter x 2-1/4 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screw, 50-Pack

Sale price$35.09 Regular price$38.99
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Description

Hillman 3/8 in. Diameter x 2-1/4 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screw, 50-PackHillman Grade 8 Hex Head Cap Screws, 3 8" x 2 1 4", 50 Pack Heavy duty Grade 8 hex head cap screws engineered from heat treated steel for maximum strength. Ideal for securing machinery and structural assemblies, these partially threaded bolts feature a washer face for a better seal and reliable clamping. Key Features: Grade 8 Strength: Heat treated steel delivers high tensile strength for demanding applications Washer Face Head: Built in bearing

Hillman Grade 8 Hex Head Cap Screws, 3/8" x 2-1/4", 50-Pack

Heavy-duty Grade 8 hex head cap screws engineered from heat-treated steel for maximum strength. Ideal for securing machinery and structural assemblies, these partially threaded bolts feature a washer face for a better seal and reliable clamping.


Key Features:

  • Grade 8 Strength: Heat-treated steel delivers high tensile strength for demanding applications
  • Washer Face Head: Built-in bearing surface improves sealing and load distribution
  • Partially Threaded Shank: Enhanced shear strength and alignment in bolted joints
  • Coarse Thread: Reliable engagement for faster installation with nuts or tapped holes
  • Multipack Convenience: 50 boxed screws for shop, jobsite, or maintenance stock

Specifications Table:

Specification Details
Diameter 3/8 inch
Length 2-1/4 inch
Material Steel
Finish Heat Treated
Grade Grade 8
Head Style Hex head with washer face
Thread Type Coarse
Threading Partially threaded along shank
Number in Package 50 pack
Packaging Type Boxed
Category Hex Bolts

Frequently Asked Questions (FAQ):

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


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


Q: Do these have a special finish?
A: Yes. They are heat-treated and noted with a yellow dichromate-style finish in some listings for added wear resistance.


Q: What thread type do they use?
A: Coarse thread suitable for use with matching nuts or tapped holes.


Q: Can these be used in structural or machinery applications?
A: Yes. Grade 8 heat-treated steel is appropriate for high-load mechanical assemblies when sized and torqued correctly.


Industrial Poise with Performance Precision

These hex cap screws bring a crisp, engineered silhouette to hardware moments, marrying strength with sleek utility. The faceted head and washer face create a refined, intentional detail in exposed fastener applications. Style them with blackened steel brackets or natural oak for a chic contrast. Essential, enduring, and unapologetically functional—hardware that elevates the build.


Stock your project with Grade 8 reliability—add this 50-pack of Hillman hex cap screws 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: 15850947782

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Carol Sawtelle
Houston, US
★★★★★ 5
Sturdy rope
Size: Medium (23.60")
Very sturdy rope. My dog is a heavy chewer and this rope is perfect for her.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
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Country Heaven
Cuba, US
★★★★★ 5
This is the one for my dog, (and maybe yours)
Size: Medium (23.60")
Great dog toy! Got the larger size— less accidental hand bites that way. It’s our second one, but the pup is a strong chewer so no disappointments with the product at all. Many breeds would not do what mine did to the rope. I love that it’s natural cotton. The longer version that I ordered comes with 3 knots, including one near each end— great— and one in the middle, which I don’t like or need. It’s a tad difficult to untie the central knot, but it’s possible with a screw driver or awl, and then it’s a perfect toy.
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Reviewed in the United States on April 5, 2025
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PoodleGlue
Cuba, US
★★★★★ 5
Does not fray.
Size: Medium (23.60")
My 70# poodle loves playing with it. She throws it in the air and catches it and brings it to me and I throw it or I tug with her. It’s very sturdy.
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Reviewed in the United States on January 31, 2026
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William
Grantham, US
★★★★★ 5
Rope chew
Size: Medium (23.60")
It’s perfect for an over aggressive dog chewer, especially a puppy has worked phenomenally. Well he has not chewed through it, which is amazing. We’ll get it again, but a bigger one as he grows.
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Reviewed in the United States on March 6, 2026
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gemsinger
Battle Creek, US
★★★★★ 4
Good quality and non toxic
Size: Small (12.00")
Nice that’s it’s natural rope untreated and My dog Gabe loves them. He goes through one every two months!
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Reviewed in the United States on March 30, 2026

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