SKU: 32069379117

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

Sale price$78.29 Regular price$86.99
Save 10%

Pay in installments of $21.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Hillman 3/8 in. Diameter x 4-1/2 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screw, 50-PackHillman Grade 8 Hex Head Cap Screws, 3 8" x 4 1 2", 50 Pack Heavy duty hex head cap screws made from heat treated Grade 8 steel for high strength fastening. Partially threaded with a washer face under the head, these 3 8 in. x 4 1 2 in. bolts deliver reliable clamping force in automotive, machinery, and structural applications. Key Features: High Strength Grade 8: Heat treated steel offers superior tensile strength for demanding applications Reliable

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

Heavy-duty hex head cap screws made from heat-treated Grade 8 steel for high-strength fastening. Partially threaded with a washer face under the head, these 3/8 in. x 4-1/2 in. bolts deliver reliable clamping force in automotive, machinery, and structural applications.


Key Features:

  • High Strength Grade 8: Heat-treated steel offers superior tensile strength for demanding applications
  • Reliable Seal: Washer face under the head improves load distribution and seating
  • Partially Threaded Shank: Enhances shear strength where unthreaded grip is needed
  • Coarse Thread: Promotes quick starts and strong holding power in tapped holes or with nuts
  • Bulk Value Pack: 50-count boxed pack for shop, jobsite, or maintenance stock

Specifications Table:

Specification Details
Diameter 3/8 inch
Length 4-1/2 inch
Material Steel
Grade Grade 8
Finish Heat-treated (yellow dichromate style)
Head Type Hex head with washer face
Thread Type Coarse
Threading Partially threaded shank
Package Quantity 50 pack
Packaging Boxed
Intended Use Use with a nut or in a tapped hole; tighten with a wrench or drill
Package Dimensions (L x W x H) 5.3 in x 4.3 in x 3.2 in
Package Weight 7.9 lbs

Frequently Asked Questions (FAQ):

Q: Are these bolts fully or partially threaded?
A: They are partially threaded along the shank for improved shear strength.


Q: What finish do these have?
A: They are heat-treated; listings note a yellow dichromate-style finish associated with Grade 8 hardware.


Q: What thread type is used?
A: Coarse thread suitable for use with matching Grade 8 nuts and washers.


Q: How are they installed?
A: Tighten with a wrench or compatible driver on the hex head; use with a nut or in a properly tapped hole.


Q: Is this a bulk package?
A: Yes, the box contains 50 bolts.


Industrial Strength, Clean Geometry

This hex cap screw brings a crisp, architectural rigor to the details that hold a space together. The faceted head with its washer face offers a tidy, intentional finish, even in exposed applications. Style it with blackened steel brackets or oak joinery to celebrate honest hardware. It’s the quiet, robust essential that underpins a polished, luxury build.


Equip your project with Grade 8 strength—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: 32069379117

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.5 ★★★★★
Based on 26 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
O
Verified Purchase
orestes o.
Whiting, US
★★★★★ 1
Demasiado pesado
Style: 4-Tier Shelf Brackets, Hardware Only.
No me gustó , además de ser muy complejo para armar , es demasiado pesado , es para paredes bien fuerte ya que requiere muchos tornillos
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
S
Verified Purchase
s.wkan
San Leandro, US
★★★★★ 5
Love these shelves
Style: 4-Tier Shelf Brackets with 3 Boards-24in
Highly recommend these shelves. So easy to put together and they are sturdy and look great. I’m considering buying a second one!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 19, 2025
A
Verified Purchase
Alan Robertson
Lowell, US
★★★★★ 5
Quick and easy - nice pipe kit.
Size: 4-Tier (Not included planks)
Pair these with some shelving boards from your local big box store, and you're in business. These look nice, and are easy to assemble. I had them up and on the wall in about 90 minutes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
D
Verified Purchase
Dora
Waukegan, US
★★★★★ 5
Sturdy, Be mindful if a few things in advance
Size: 5-Tier (Not included planks), Size: 5-Tier (Not included planks)
Good quality. The black pipe compliments our decorating style so we are over all pleased. Be mindful of the following: - Needs a little bit of expertise in making sure all the flanges line up and are level/plumb. - Even if/when you pre assemble tubing according to printed instructions, the shelving won't line up and some connection parts will have to be loosened to line up. - I consider us (me & the hubs) little above average when it comes to DIY but this took some figuring out and cooperation during installation because we decided to align the holes on the flanges up with our studs to enforce the holding strength (for weight of books and family photo albums/picture boxes). This choice was prompted by the poor quality of plastic drywall anchors included with the product. Now that I have installed one, I will customize next time with more height (to accommodate taller children's books that don't fit the current set up) and a bit deeper (to accommodate a 12 inch shelf/wood insert). Aesthetically, it will not accommodate a book taller than about 9 inches. Our photo albums range up to 15 inches and because the shelving depth from back wall to front of wood shelf is about 12 inches, it hangs over the front too much to look balanced. With the current set up, I'm limited with what can be placed on the shelves - size wise. While this does not have anything to do with the quality of the product, you may not know to consider these aspects in advance so thats why I include it in my review.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 13, 2021
N
Verified Purchase
Nest and Tress
Carnegie, US
★★★★★ 5
A Solid, Stylish Solution!
Size: 4-Tier (Not included planks)
I use this industrial pipe shelf setup in my salon to display and organize products, and it’s been a great fit. The hardware is sturdy and gives a clean, rustic vibe that works well with my space. It was easy to install, and I added my own boards to customize the look. The open design makes it easy for clients to see what’s available, and it’s held up well with daily use. A solid, stylish solution for keeping things neat and accessible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025

recommand products