Hillman Grade 5 Zinc Hex Head Cap Screws, 5/16 × 3-1/2 in, 50-Pack
Heat-treated zinc
$40.99 /pack
Orders start at $399. Combine any items to reach it.
- 1 pack
- $40.99
- Standard delivery
- $49.99 per order
- Sales tax
- Added at checkout
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Standard delivery$49.99
Per order, added in your cart. We deliver to the 48 contiguous states.
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Goes with
Fasteners
Details & specifications.
From the maker · the maker’s description
These Grade 5 hex head cap screws from Hillman deliver reliable fastening strength for automotive, machinery, and general construction projects. Made of steel with a heat-treated zinc finish, they resist wear while the washer-faced head provides a better seal.
Industrial polish with purposeful strength
I love how these zinc-kissed hex cap screws bring a refined industrial note to projects—sleek, resilient, and unapologetically functional. The washer-faced head is a subtle design detail that reads clean while working hard behind the scenes. Style them with raw woods and matte black hardware for a balanced, tailored contrast. They’re the quiet essential that elevates craftsmanship to a luxe finish.
Choose these Hillman Grade 5 hex cap screws for dependable strength and a clean, corrosion-resistant finish on your next build.
- SKU
- 200096
- Length
- 3-1/2 inch
- Finish
- Heat-treated zinc
- Head
- Hex head with washer face
- Material
- Steel
- Diameter
- 5/16 inch
- Brand
- Hillman
- Grade
- Grade 5
- Thread Type
- Coarse
- Threading
- Partially threaded along shank
- Units
- Imperial
- Pieces per Pack
- 50
- Packaging Type
- Boxed
- Full product name
- Hillman 5/16 in. Diameter x 3-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 50-Pack
Key features
- Grade 5 Strength: Heat-treated steel provides higher tensile strength for demanding applications
- Corrosion-Resistant Finish: Zinc plating helps protect against rust and wear
- Washer-Faced Hex Head: Flat bearing surface under head improves sealing and load distribution
- Partially Threaded Shank: Adds shear strength while allowing precise clamping
- Coarse Thread Compatibility: Ideal for quick assembly and strong hold with standard nuts
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.
No. They are Grade 5 hex cap screws with a partially threaded shank.