Hillman Grade 8 Hex Head Cap Screws, 3/8" x 4-1/2", 50-Pack

Heavy-duty hex head cap screws made from heat-treated Grade 8 steel for high-strength fastening. Partially threaded with a washer face under the head, these 3/8 in. x 4-1/2 in. bolts deliver reliable clamping force in automotive, machinery, and structural applications.

Key Features:

• High Strength Grade 8: Heat-treated steel offers superior tensile strength for demanding applications
• Reliable Seal: Washer face under the head improves load distribution and seating
• Partially Threaded Shank: Enhances shear strength where unthreaded grip is needed
• Coarse Thread: Promotes quick starts and strong holding power in tapped holes or with nuts
• Bulk Value Pack: 50-count boxed pack for shop, jobsite, or maintenance stock

Specifications Table:

Frequently Asked Questions (FAQ):

Q: Are these bolts fully or partially threaded?
A: They are partially threaded along the shank for improved shear strength.

Q: What finish do these have?
A: They are heat-treated; listings note a yellow dichromate-style finish associated with Grade 8 hardware.

Q: What thread type is used?
A: Coarse thread suitable for use with matching Grade 8 nuts and washers.

Q: How are they installed?
A: Tighten with a wrench or compatible driver on the hex head; use with a nut or in a properly tapped hole.

Q: Is this a bulk package?
A: Yes, the box contains 50 bolts.

Industrial Strength, Clean Geometry

This hex cap screw brings a crisp, architectural rigor to the details that hold a space together. The faceted head with its washer face offers a tidy, intentional finish, even in exposed applications. Style it with blackened steel brackets or oak joinery to celebrate honest hardware. It’s the quiet, robust essential that underpins a polished, luxury build.

Equip your project with Grade 8 strength—add this 50-pack of Hillman hex cap screws to your cart today.