5/16"-18 x 3-1/2" Zinc Plated Grade 2 / A307 Steel Coarse Thread Carriage Bolts
These 5/16-18 x 3-1/2 Carriage Bolts from Midwest are crafted from low-carbon steel for enhanced durability and strength. Featuring a zinc finish, they offer moderate corrosion resistance, making them suitable for a variety of indoor and outdoor applications. The square neck design prevents the bolt from turning during installation, ensuring ease of use and a secure fit. Ideal for woodworking and construction projects, these carriage bolts provide a clean, finished appearance with their large, domed heads, while delivering maximum holding power. Their precise threading allows smooth engagement with nuts, ensuring components stay firmly connected even under stress. Perfect for professionals and DIY enthusiasts alike, these bolts combine reliability and performance for a wide range of fastening needs.
Features
- Manufactured from low-carbon steel for durability and strength
- Large, domed head provides a clean finished appearance and maximum holding power in wood
- Zinc finish provides moderate corrosion resistance
- 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
Specifications
- Drive Size: N/A
- Scale: Standard
- Retail Selling Unit Piece Count: 50
- Length: 3-1/2"
- Nominal Size: 5/16 in.-18 x 3-1/2 in.
- Material: Steel
- Finish: Zinc
- Diameter: 5/16"
- Class: BL
- Product Line: GF
- Tariff Code: 7318.15.2055
- Thread Size: 18
- Subclass: CS
- Country of Origin: China
- Drive Type: None
- Thread Type: Coarse

















































