SKU: 35569724716

Hillman 5/16 in. Diameter x 3 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, Coarse Thread, 100-Pack

Sale price$71.99 Regular price$79.99
Save 10%

Pay in installments of $20.00 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Hillman 5/16 in. Diameter x 3 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, Coarse Thread, 100-PackHillman Grade 8 Hex Cap Screws, 5 16" x 3", 100 Pack Heavy duty Grade 8 hex head cap screws built from heat treated steel for demanding fastening applications. Coarse threaded with a washer face for secure seating and long lasting performance. Ideal for machinery, automotive, and construction projects. Key Features: Heavy Duty Grade 8: Engineered for high strength applications and superior load bearing performance Heat Treated Steel: Enhanced

Hillman Grade 8 Hex Cap Screws, 5/16" x 3", 100-Pack

Heavy-duty Grade 8 hex head cap screws built from heat-treated steel for demanding fastening applications. Coarse-threaded with a washer face for secure seating and long-lasting performance. Ideal for machinery, automotive, and construction projects.


Key Features:

  • Heavy-Duty Grade 8: Engineered for high-strength applications and superior load-bearing performance
  • Heat-Treated Steel: Enhanced durability and wear resistance for long service life
  • Coarse Thread: Reliable grip and faster assembly in tapped holes or with nuts
  • Washer Face Under Head: Better seal and seating against surfaces to reduce loosening
  • Bulk Value Pack: 100 screws sized 5/16 in. diameter x 3 in. length

Specifications Table:

Specification Details
Brand Hillman
Product Type Hex Head Cap Screws
Diameter 5/16 inch
Length 3 inch
Material Steel
Finish Heat Treated (yellow dichromate referenced)
Grade 8
Thread Type Coarse
Threading Partially threaded along shank
Head Style Hex head with washer face under head
Number in Package 100 pack
Packaging Type Boxed
Tightening Method Wrench or drill
Package Height 3.2 in
Package Width 4.3 in
Package Length 5.3 in
Package Weight 7.6 lbs

Frequently Asked Questions (FAQ):

Q: Are these fully or partially threaded?
A: They are partially threaded along the shank.


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


Q: What is the thread type?
A: Coarse thread.


Q: What material and finish do they have?
A: Made of heat-treated steel; yellow dichromate style finish referenced for strength and wear resistance.


Q: Can these be used in automotive or machinery applications?
A: Yes, as Grade 8 heat-treated steel hex cap screws, they are suitable for high-stress applications in automotive and machinery.


Industrial Strength with Clean, Purposeful Lines

These hex cap screws bring a refined, utilitarian elegance to any build—sleek heads and crisp geometry that read as confident and modern. The heat-treated Grade 8 steel delivers a commanding presence and resilience. Style them with blackened hardware and raw oak shelving to underscore a crafted, industrial vibe. Essential, functional, and impeccably strong—this is hardware that elevates the everyday.


Secure your projects with trusted Grade 8 strength—add this Hillman 100-pack to your toolkit 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: 35569724716

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 6 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
Janie Bryson
Dallas, US
★★★★★ 5
Great gift for men who have everything for garage
Bought these as a gift for a man who has everything but these hooks. He loved them. size was perfect for garage and the magnetic strength was great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
J
Verified Purchase
Jane Gray
Phoenix, US
★★★★★ 5
good quality
Size: 4" - Black, Style: Open Hooks
Really strong magnets. Holds up stall cleaning forks on the trailer wall even when under way
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
S
Verified Purchase
Spunky Punky Sparkle Princess
Port Orchard, US
★★★★★ 5
These are a good choice
Color: Black-2 Set
These are great. They are made well, look nice and are easy to move when I’m dusting. I use these to keep perfumes, lotions and vitamins organized atop my dresser. The velvety compartments are a well sized and the layout is conducive to storing the kind of objects women or men typically store atop a dresser. I find these bins quite functional. I feel like these were a good value. They weren’t the cheapest and they weren’t the most expensive. They look nice and feel high quality enough.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 4, 2025
L
Verified Purchase
LilyLucy
Chelsea, US
★★★★★ 5
Nice and works great in my nightstand
Color: Beige
Smaller than I expected, but good quality and looks nice in my nightstand drawer. It will keep things from rolling around. Seems sturdy and I like the pinkish undertone to the beige.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
M
Verified Purchase
Mountain Woman
West Palm Beach, US
★★★★★ 5
Great end table organizer, Style, size, cost
Color: Brown-2 Set
Good size, very useful tray. The large compartments are laid out well. Small areas good to hold a watch, change, lip balm, etc. Affordable price and made well, looks more expensive. Keeps "stuff" neat and clean.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026

recommand products