Grade 8 Hex Head Cap Screws, 5/16 × 1-1/4 in (100-Pack)
$43.99 /pack
Orders start at $399. Combine any items to reach it.
- 1 pack
- $43.99
- 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 high-strength fastening. Coarse thread with washer face under the head provides secure clamping and reliable torque in machinery, automotive, and construction applications.
Industrial Strength, Clean Hardware Finish
These hex cap screws bring a quiet, engineered rigor to your projects—sleek, purposeful, and impeccably strong. The faceted head and washer face create a crisp, tailored look against metal or hardwood. Style them with blackened brackets or raw steel accents for a refined utilitarian statement. Consider them the discreet luxury essential that keeps bold design securely in place.
Secure your builds with Grade 8 confidence—add this 100-pack to your cart and finish the job right.
- SKU
- 220071
- Length
- 1-1/4 inch
- Finish
- Heat-treated; yellow dichromate noted
- Head
- Hex head, washer face under head
- Material
- Steel
- Diameter
- 5/16 inch
- Brand
- Hillman
- Grade
- Grade 8
- Thread Type
- Coarse (USS)
- Threading
- Partially threaded shank
- Units per Package
- 100 pack
- Packaging Type
- Boxed
- Full product name
- Hillman 5/16 in. D x 1-1/4 in. L Heat-Treated Steel Grade 8 Hex Head Cap Screws, Coarse Thread (100-Pack)
Key features
- Grade 8 Strength: Heat-treated steel delivers high tensile strength for demanding applications
- Washer Face Under Head: Improves load distribution and sealing for a solid clamp
- Coarse Thread: Promotes quick starts and strong holding in tapped holes or with nuts
- Precise Sizing: 5/16 in. diameter x 1-1/4 in. length, partially threaded shank
- Bulk Value: Box of 100 screws for shop, jobsite, or inventory needs
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.