Grade 8 Hex Cap Screws, 5/16 × 3 in, 100-Pack
100 per pack
$79.99 /pack
$0.80 per piece · 100 per pack
Orders start at $399. Combine any items to reach it.
Sold by the pack of 100. We round up and set the quantity for you.
- 1 pack · 100 pieces
- $79.99
- Standard delivery
- $49.99 per order
- Sales tax
- Added at checkout
All orders are subject to approval.
You're not charged until your order is approved and ready to ship. Cancel free before then.
Standard delivery$49.99
Per order, added in your cart. We deliver to the 48 contiguous states.
Availability confirmed by the desk at approval, with your delivery date. Shipping policy · Returns
Goes with
Hillman · Fasteners
Details & specifications.
From the maker · Hillman’s description
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.
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.
- SKU
- 220092
- UPC
- 008236081572
- Length
- 3 inch
- Per pack
- 100 per pack
- Finish
- Heat Treated (yellow dichromate referenced)
- Head
- Hex head with washer face under head
- Material
- Steel
- Diameter
- 5/16 inch
- Brand
- Hillman
- Product Type
- Hex Head Cap Screws
- Grade
- 8
- Thread Type
- Coarse
- Threading
- Partially threaded along shank
- 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
- Full product name
- Hillman 5/16 in. Diameter x 3 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, Coarse Thread, 100-Pack
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 are provided by the manufacturer. Brand names are trademarks of their owners.
Guide
Choosing the fastener
- 1
Outdoors and treated lumber
Use hot-dip galvanized, stainless or exterior-coated fasteners, and follow the board maker’s fastener recommendation.
- 2
Price per piece
The pack price divided by the pieces in the pack, both as listed.
- 3
Drive
Star (Torx), square, Phillips or hex, as the listing states. Match the bit you carry.
They are partially threaded along the shank.