Hillman 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.

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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

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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

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Frequently Asked Questions (FAQ):

Q: What size nut do these screws use?
A: They use standard 3/8 in.-16 UNC nuts and washers.

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Q: Are these fully threaded?
A: They feature partial threading typical of hex cap screws; threading length varies by bolt length.

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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.

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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.

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Q: Are nuts or washers included?
A: No—nuts and washers are sold separately.

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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.

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Outfit your next project with reliable, Grade 5 strength—add this 50-pack to your cart and build with confidence.