5/16" x 2-1/2"Hot Dip Galvanized Grade 307A Carriage Bolt Kit, 50 Pack, Comes with 5/16" USS Flat Washers & 5/16"-18 Hex Nuts, Heavy Duty Exterior Construction Use

Product Details

• Color: Silver
• Item Dimensions: 6.7 x 4.3 x 2.8 inches
• Number of Items: 50
• Unit Count: 50 Count
• Part Number: CB-5/16*2-1/2
• Thread Size: 5/16"
• Exterior Finish: Zinc
• Manufacturer Grade: Grade 307A
• Screw Head Style: Flat
• Fastener Type: Carriage Bolt
• Thread Type: Unc
• Thread Style: Right Hand, Coarse
• Item Hardness: Grade 307A
• Head Type: carriage
• Screw Point Style: Flat Point
• Compatible Groove Diameter: 7.94 millimeters
• Set Screw Thread Type: Unified National Coarse (UNC)
• Finish Types: Hot dip galvanized
• Item Diameter: 0.31 inches
• Size Name: 5/16*2-1/2
• Number of Pieces: 50
• Fastener Size: 5/16*2-1/2
• Thread Coverage: Fully Threaded
• Outside Diameter: 7.94 millimeters
• Set Name: Zivovoy 50-Piece Carriage Bolt Kit
• Model: 5/16" x 2-1/2"

About this item

• Multiple Size Options: Available in 5/16"×1", 1-1/2", 2", 2-1/2", and 3" lengths to fit various wood thicknesses, ideal for decks, fences, gazebos, pergolas, and all outdoor projects.
• Complete All-In-One Kit: Each set includes carriage bolts, thick washers, and hex nuts. No extra parts needed, ready to use right out of the box.
• Long-Lasting Rust & Corrosion Resistance: Hot dip galvanized finish offers excellent weather and corrosion resistance, works with ACQ treated lumber, perfect for all outdoor conditions.
• Smooth, Clean Flush Finish: Flat head design creates a semi-flush surface with no sharp edges, keeping your projects neat, safe, and visually appealing.
• Secure, Anti-Slip Installation: Square neck prevents spinning during installation; coarse UNC threads provide strong grip to avoid stripping or loosening over time.
• Quality Meets Industrial Standards: Complies with ASME and ASTM specifications, durable enough for heavy-duty outdoor use.