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
US$53.98
Arrives as soon as ✓ Free shipping over $200Description
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 Manufactu...
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Orders of $200 or more ship free. No code needed.
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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"ร1", 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.
Shipping Policy
Road & Rim ships from the United States.
Most orders leave the warehouse within 1 business day and arrive in 2โ7 business days.
- Free shipping on orders of $200 or more, applied automatically
- Otherwise shipping is a flat $6.90
- Your tracking number is emailed as soon as your order ships
- We currently ship to the lower 48 United States
Return policy
30-day returns.
If it's not quite right, you have 30 days from delivery to send it back, and Road & Rim will email you a return label. Return shipping fees may apply depending on the item's size, weight, and shipping location, and are deducted from your refund.
How it works
- Email us at support@roadandrim.com with your order number.
- We send a return label within 1 business day, along with the return shipping cost (if any) so you can decide.
- Your refund goes back to your original payment method within 10 business days of the carrier scan.
Items should be unused, unassembled, and in their original packaging. Damaged or defective on arrival? Send a photo and Road & Rim replaces or refunds immediately, return shipping on us, and in most cases you won't need to send anything back.