Stainless Steel Hex Head Cap Screws, 5/16-18 x 2-1/2 in (50-Pack)

Durable 18-8 stainless steel hex cap screws for high‑torque fastening in tapped holes or with nuts. Coarse 5/16‑18 threads and partial shank threading deliver strong hold and corrosion resistance for indoor and outdoor projects.

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Key Features:

• Corrosion Resistant: 18-8 stainless steel withstands moisture and the elements
• High Torque Capability: Hex cap head with machine threads for secure tightening
• Better Seal: Washer face under the head helps distribute load and improve sealing
• Versatile Use: Partially threaded (USS) shank works in tapped holes or with nuts
• Bulk Value: 50 screws per boxed pack for jobsite or shop needs

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Specifications Table:

Specification	Details
Diameter/Thread	5/16-18
Length	2-1/2 in
Material	18-8 Stainless Steel
Head Type	Hex Cap
Thread Type	Coarse
Partial Thread	USS style (partially threaded along shank)
Washer Face	Under-head washer face for better seal/load distribution
Number in Package	50
Packaging Type	Boxed
Tightening Method	Use wrench or drill
Unit of Measurement Listed	Metric (per Ace data)
Package Dimensions (L x W x H)	4.5 x 3.5 x 2 in
Package Weight	3.3 lb
Brand	Hillman

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Frequently Asked Questions (FAQ):

Q: Are these fully threaded?
A: No. They are USS-style and partially threaded along the shank.

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Q: What wrench size should I use?
A: Use a compatible hex wrench/socket sized for 5/16-18 hex cap screws; match to the fastener’s head size used in standard hardware sets.

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Q: Will they resist rust outdoors?
A: Yes. The 18-8 stainless steel provides enhanced corrosion resistance suitable for outdoor and damp environments.

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Q: Can I use them with power tools?
A: Yes. Tighten with a wrench or drill/driver using the correct socket or bit.

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Q: What thread type is this?
A: Coarse thread, 5/16-18.

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Polished Utility with Enduring Strength

These stainless hex cap screws bring a clean, refined hardware detail to cabinetry, shelving, and custom fixtures. The crisp hex head and subtle sheen feel purposeful and modern while delivering unwavering strength. Pair them with brushed steel brackets or matte black hardware for a tailored, architectural look. A small but essential element, they elevate everyday installations to a luxe, lasting finish.

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Secure your projects with corrosion‑resistant strength—add this 50‑pack of Hillman stainless hex cap screws to your cart now.