Stainless Steel Hex Head Cap Screw, 5/16-18 x 3-1/2, 50-Pack

Durable 18-8 stainless steel hex head cap screws for high-torque fastening in tapped holes or with nuts. Coarse, partially threaded shank with washer face under the head delivers a secure seal and corrosion resistance for indoor/outdoor projects.

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Key Features:

• Corrosion-Resistant Stainless Steel: 18-8 stainless steel for long-lasting performance in outdoor and marine environments
• High-Torque Hex Cap Head: Hex head with machine threads supports strong, reliable tightening with a wrench or drill
• Washer Face Under Head: Built-in washer face helps create a better seal and distribute load
• Partially Threaded (USS): Coarse threads with a solid shank for strength where shear resistance matters
• Bulk 50-Pack: Convenient boxed pack for jobs requiring multiple fasteners

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Specifications Table:

Specification	Details
Brand	Hillman
Type	Hex head cap screw
Diameter / Thread Pitch	5/16-18
Length	3-1/2 inch
Material	18-8 Stainless Steel
Thread Type	Coarse
Thread Coverage	Partially threaded (USS)
Head Feature	Washer face under head
Finish	Stainless steel
Number in Package	50
Packaging Type	Boxed
Installation	Tighten with wrench or drill
Package Dimensions (HxWxL)	2 in x 3.5 in x 4.5 in
Package Weight	3.3 lb

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Frequently Asked Questions (FAQ):

Q: Are these fully threaded?
A: No. They are USS partially threaded along the shank with coarse machine threads.

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Q: What tools are recommended for installation?
A: Tighten with a wrench or a drill using an appropriate hex socket.

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Q: Can these be used outdoors?
A: Yes. The 18-8 stainless steel offers enhanced corrosion resistance suitable for outdoor and damp environments.

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Q: Do they have a built-in washer?
A: They feature a washer face under the head to improve sealing and load distribution.

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Q: What size are these screws?
A: 5/16-18 thread diameter/pitch and 3-1/2 inch length.

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Sleek, Industrial Fastening with Enduring Stainless Poise

These stainless hex cap screws bring a crisp, tailored precision to any build, marrying function with a polished industrial aesthetic. The subtle washer face and clean shank lines create a refined detail that elevates cabinetry, fixtures, and custom metalwork. Style them with brushed steel hardware and natural woods for a modern, textural contrast. A staple of luxurious craftsmanship, they deliver performance and poise in equal measure.

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Upgrade your project with these corrosion-resistant stainless hex cap screws—order the 50-pack today for dependable, high-torque fastening.