5/16"-18 x 4" Hot Dip Galvanized Grade 2 / A307 Steel Coarse Thread Carriage Bolts
These 5/16-18 x 4 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. The square neck design prevents the bolt from turning during installation, while the large, domed head offers a clean appearance and maximum holding power in wood. Precision threading ensures smooth engagement with nuts, providing a secure and reliable connection under stress. Perfect for construction, woodworking, and outdoor projects, these carriage bolts deliver strength and corrosion resistance, making them a dependable choice for both professional contractors and DIY enthusiasts. Midwest’s commitment to quality ensures these bolts meet the demands of various applications where durability and performance are essential.
Features
- Square neck prevents bolt from turning with nut and washer during installation
- Hot-dip galvanized coating is suitable for exterior and treated wood applications
- Large, domed head provides a clean finished appearance and maximum holding power in wood
- Manufactured from low-carbon steel for durability and strength
- Precise threading provides smooth engagement with nuts to provide maximum holding power, ensuring components remain firmly connected under stress
Specifications
- Thread Size: 18
- Length: 4"
- Diameter: 5/16"
- Drive Size: N/A
- Product Line: GF
- Material: Steel
- Retail Selling Unit Piece Count: 50
- Thread Type: Coarse
- Class: BG
- Scale: Standard
- Drive Type: None
- Subclass: CS
- Nominal Size: 5/16 in.-18 x 4 in.
- Country of Origin: China
- Tariff Code: 7318.15.2055
- Finish: Hot Dipped Galvanized

















































