Hillman 3/8 in. Dia. x 3-1/2 in. L Heat-Treated Zinc Steel Hex Head Cap Screw, 50-Pack
Regular price $43.99Hillman 3/8 in. x 3-1/2 in. Hex Head Cap Screws (50-Pack)
Grade 5 heat-treated hex head cap screws for strong, reliable fastening in wood or metal. Zinc-plated alloy steel resists wear and corrosion, ideal for general construction and repair where a 3/8 in.-16 thread is needed.
Key Features:
- Durable Grade 5 Strength: Heat-treated alloy steel provides higher tensile strength for demanding applications
- Corrosion-Resistant Zinc Finish: Protective plating helps prevent rust for longer service life
- Standard Hex Head: Tightens easily with a wrench or driver for secure assembly
- Coarse 3/8 in.-16 Thread: Compatible with UNC nuts and tapped holes
- Bulk Pack Convenience: 50-piece pack reduces trips and keeps projects moving
Specifications Table:
| Specification | Details |
|---|---|
| Diameter | 3/8 inch |
| Length | 3-1/2 inch |
| Thread Size | 3/8 in.-16 UNC |
| Thread Type | UNC, Right Hand |
| Head Style | Hex |
| Material | Alloy Steel |
| Finish | Zinc plated |
| Grade | Grade 5 |
| Fastener Type | Hexagon bolt / hex head cap screw |
| Package Quantity | 50 pieces |
| Item Weight | 6.54 lb (pack) |
| Product Dimensions (packaging) | 1 x 1 x 7 inches |
Frequently Asked Questions (FAQ):
Q: What size nut do these screws use?
A: They use standard 3/8 in.-16 UNC nuts and washers.
Q: Are these fully threaded?
A: They feature partial threading typical of hex cap screws; threading length varies by bolt length.
Q: Can these be used outdoors?
A: The zinc finish offers basic corrosion resistance; for harsh or marine environments, consider stainless or hot-dip galvanized fasteners.
Q: What tool is needed for installation?
A: Use a wrench or socket sized for the 3/8 in. hex cap screw head to tighten.
Q: Are nuts or washers included?
A: No—nuts and washers are sold separately.
Quiet Strength with a Polished Edge
These hex cap screws bring a purposeful, architectural clarity to your builds—sleek zinc sheen meeting steadfast Grade 5 strength. I love their honest, utilitarian profile; it feels elevated when paired with blackened steel brackets or pale oak. Use them as a subtle, uniform detail across exposed hardware moments to create rhythm and refinement. Consider them the understated hardware essential that anchors luxe, lived-in spaces.
Outfit your next project with reliable, Grade 5 strength—add this 50-pack to your cart and build with confidence.
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