5/16 in. Hot-Dip Galvanized USS Flat Washers (100-Pack)

These Hillman USS flat washers add load distribution and prevent fasteners from biting into wood or metal. Made of steel with a hot-dipped galvanized finish, they deliver reliable corrosion resistance for outdoor and marine projects.

Key Features:

• Corrosion Protection: Hot-dipped galvanized steel resists rust in outdoor and marine environments
• Load Distribution: Flat washer design spreads force to protect surfaces and strengthen joints
• USS Compatibility: Sized for coarse-thread 5/16 in. bolts and screws
• Bulk Value: 100-pack for jobsite efficiency and replenishment
• Durable Construction: Steel build maintains clamping force under heavy use

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What bolt size are these washers for?
A: They are designed for use with 5/16 in. coarse-thread (USS) bolts and screws.

Q: Can these be used outdoors?
A: Yes. The hot-dipped galvanized finish provides strong corrosion resistance suitable for outdoor applications.

Q: Are these metric or inch sized?
A: Inch sized (USS standard).

Q: What is included in the package?
A: A boxed 100-pack of 5/16 in. USS flat washers.

Q: Do these work with fine-thread hardware?
A: They are intended for USS coarse-thread bolts; match washers to the hardware standard you’re using for best results.

Industrial Strength, Effortless Finish

The galvanic sheen of these flat washers brings a refined, utilitarian beauty to exposed hardware moments. Their hot-dipped finish offers a rugged texture that complements raw woods and weathered metals. Style them with blackened bolts on cedar or concrete for a crisp, architectural detail. A small component with big impact—essential for enduring, luxe outdoor installations.

Equip your project with corrosion-resistant confidence—add this 100-pack of Hillman 5/16 in. galvanized flat washers to your cart today.