5/16"-18 x 2-1/2" Hot Dip Galvanized Grade 2 / A307 Steel Coarse Thread Carriage Bolts
These 5/16-18 x 2-1/2 Carriage Bolts from Midwest are crafted from durable low-carbon steel and feature a hot-dip galvanized finish, making them ideal for exterior and treated wood applications. Their square neck design prevents the bolt from turning when tightening nuts and washers, ensuring a secure installation every time. The large, domed head offers a clean, finished appearance while maximizing holding power in wood. With precise threading for smooth engagement, these carriage bolts provide reliable strength and stability, making them suitable for construction, woodworking, and outdoor projects where long-lasting connections are essential. Midwest’s high-quality bolts deliver consistent performance and corrosion resistance, making them a dependable choice for both professional contractors and DIY enthusiasts.
Features
- Manufactured from low-carbon steel for durability and strength
- Square neck prevents bolt from turning with nut and washer during installation
- Precise threading provides smooth engagement with nuts to provide maximum holding power, ensuring components remain firmly connected under stress
- Large, domed head provides a clean finished appearance and maximum holding power in wood
- Hot-dip galvanized coating is suitable for exterior and treated wood applications
Specifications
- Material: Steel
- Scale: Standard
- Thread Size: 18
- Length: 2-1/2"
- Thread Type: Coarse
- Class: BG
- Finish: Hot Dipped Galvanized
- Drive Type: None
- Drive Size: N/A
- Retail Selling Unit Piece Count: 100
- Nominal Size: 5/16 in.-18 x 2-1/2 in.
- Diameter: 5/16"
- Tariff Code: 7318.15.2055
- Country of Origin: China
- Product Line: GF
- Subclass: CS

















































