SKU: 49041788946

Hillman 3/8 in. Diameter x 2-1/4 in. Length Grade 5 Heat-Treated Zinc Steel Hex Head Cap Screws, Coarse Thread, 50-Pack

Sale price$27.89 Regular price$30.99
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Description

Hillman 3/8 in. Diameter x 2-1/4 in. Length Grade 5 Heat-Treated Zinc Steel Hex Head Cap Screws, Coarse Thread, 50-PackHillman Grade 5 Hex Cap Screws 3 8 in. x 2 1 4 in. (50 Pack) Durable Grade 5 hex head cap screws for strong, reliable fastening in steel and wood applications. Made from heat treated zinc plated steel with coarse threads and a washer face under the head for a secure seal. Key Features: Grade 5 Strength: Heat treated steel for higher tensile strength and wear resistance Corrosion Protection: Zinc finish helps resist rust in indoor and covered outdoor

Hillman Grade 5 Hex Cap Screws 3/8 in. x 2-1/4 in. (50-Pack)

Durable Grade 5 hex head cap screws for strong, reliable fastening in steel and wood applications. Made from heat-treated zinc-plated steel with coarse threads and a washer face under the head for a secure seal.


Key Features:

  • Grade 5 Strength: Heat-treated steel for higher tensile strength and wear resistance
  • Corrosion Protection: Zinc finish helps resist rust in indoor and covered outdoor uses
  • Coarse Thread: Provides strong hold and quicker assembly in general-purpose fastening
  • Washer Face Head: Built-in bearing surface under hex head for better sealing and load distribution
  • Convenient Value Pack: 50-piece box sized 3/8 in. diameter x 2-1/4 in. length

Specifications Table:

Specification Details
Diameter 3/8 inch
Length 2-1/4 inch
Material Steel
Finish Heat Treated Zinc
Grade Grade 5
Thread Type Coarse
Head Style Hex Head, washer face under head
Number in Package 50 pack
Packaging Type Boxed
Partially Threaded Yes
Category Hex Bolts / Hex Cap Screws

Frequently Asked Questions (FAQ):

Q: What tools are needed to install these screws?
A: Tighten with a wrench or a drill and appropriate hex socket.


Q: Are these fully threaded?
A: No, these are partially threaded along the shank (coarse thread).


Q: What grade are these bolts?
A: They are Grade 5 hex cap screws.


Q: Can these be used outdoors?
A: The zinc finish offers basic corrosion resistance; for prolonged exposure or harsh environments, consider galvanized or stainless options.


Q: What is included in the package?
A: A boxed 50-pack of 3/8 in. diameter x 2-1/4 in. length hex head cap screws.


Quiet Strength in a Sleek Zinc Finish

These hex cap screws bring a tailored precision to any build, their zinc sheen lending a crisp, utilitarian polish. The Grade 5 profile is the subtle star—clean edges, a washer-faced head, and confident proportions that feel engineered and elegant. Style them with matte black brackets or raw oak beams for an industrial-modern note that reads intentional. A small detail with a luxe impact, they’re the finishing touch that keeps structure and style in perfect conversation.


Choose these Grade 5 Hillman hex cap screws for dependable, clean-looking fastening that lasts.

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: 49041788946

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Good
Lowell, US
★★★★★ 5
Great Product and price.
Size: 5 Quart, Style: Full Synthetic, Configuration: 0W-40
Great product and price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
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Julie A.
Houston, US
★★★★★ 5
Works great never had a problem
Size: 5 Quart, Style: Full Synthetic, Configuration: 0W-40
I've been using this mobile one in my 2005 Mercedes kompressor C230 w203 1.8 engine for about 18 years and never had a problem so I will continue to use it. The price was very good compared to other places but I did have to order one extra quart, I don't know why they don't make this mobile one in a six quart jug.
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Reviewed in the United States on May 1, 2026
R
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rpeters
Dallas, US
★★★★★ 5
Great for my hot rod!
Size: 5 Quart, Style: Full Synthetic, Configuration: 0W-40
Perfect oil for my hot rod! Add a bottle of zinc and you get great low temp flow as well as good heat protection. As a 0W it flows quickly for good start up protection and the 40W means I get good protection as temps rise. My car has a flat tappet hydraulic cam so I add a bottle of zinc. Has worked great!
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Reviewed in the United States on March 19, 2026
E
Verified Purchase
Evan C. Lombardi
Houston, US
★★★★★ 5
European oil… Japanese engine… zero regrets 🇪🇺➡️🇯🇵
Size: 5 Quart, Style: Full Synthetic, Configuration: 0W-40, Size: 5 Quart, Style: Full Synthetic, Configuration: 0W-40
Yes, I know what the label says. “European Car Formula.” Yes, I put it in a 2002 Subaru WRX bugeye with an EJ257 block and EJ205 heads. And yes—this oil absolutely slaps. This engine is not stock, not delicate, and definitely not living an easy life. It sees spirited driving, boost, and the occasional questionable decision. After switching to Mobil 1 0W-40, cold starts are smoother, oil pressure is rock solid, and the motor just feels happier. No weird noises, no drama, no oil consumption surprises. The viscosity is perfect for a performance Subaru build, especially if you’re running tighter tolerances or want strong protection under heat and load. It’s thick enough when hot, flows great when cold, and inspires confidence every time I turn the key. Is it technically “European”? Sure. Does my Subaru care? Not even a little. If you’re running a built engine, turbo setup, or just want a proven, high-quality oil that punches above its weight, this stuff earns its reputation. My bugeye may not be European, but it’s living its best life on this oil. Would absolutely buy again—passport not required.
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Reviewed in the United States on January 18, 2026
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Ruben
Waukegan, US
★★★★★ 4
Great oil
Size: 5 Quart, Style: Full Synthetic, Configuration: 0W-40
No issues
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Reviewed in the United States on May 17, 2026

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