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Iterzen
50Pcs 5/16"-18x3-1/2 Carriage Bolt White Galvanized
US$58.66
Arrives as soon as ✓ Free shipping — over $200Description
Product Details Color: White Item Dimensions: 7.09 x 2.95 x 7.87 inches Number of Items: 50 Unit Count: 50 Count Part Number: bol000618260319f Thread Size: 5/16"-18 Thread Style: Right Hand...
Delivery & Returns
Ships to the United States
Free shipping on orders over $200 · $6.90 below that
30-day returns — label emailed, fees may apply
Free shipping over $200
Orders of $200 or more ship free. No code needed.
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Product Details
- Color: White
- Item Dimensions: 7.09 x 2.95 x 7.87 inches
- Number of Items: 50
- Unit Count: 50 Count
- Part Number: bol000618260319f
- Thread Size: 5/16"-18
- Thread Style: Right Hand
- Item Highlight: White Galvanized Round Head Square Neck Carriage Screws for DIY Mechanical Work
- Size Name: 5/16"-18x3-1/2"
- Thread Coverage: Fully Threaded
- Material Type: Carbon Steel
About this item
- Abrasive Material: Carbon Steel – This carriage bolt features an extra-large round head for a larger contact surface and higher-stress applications than standard round head square neck bolts. Made of quality carbon steel with high strength, good rigidity, and excellent resistance to breakage and bending. The square neck beneath the round head prevents bolt rotation during installation and use, ensuring a stable assembly and a secure connection.
- Specification: Material: Carbon Steel; Color: Blue-White; Surface Treatment: Galvanized; Screw Size: 5/16"-18; Screw Length: 3-1/2"; Screw Head Size: 3/16" x 11/16"(T x D); Package Content: 50 Pcs Carriage Bolts Screws
- Multi-Purpose: Suitable for wood-to-wood or wood-to-metal indoor fastening. Suitable for home DIY projects, furniture assembly, bed frames, tables, chairs, garage doors, cabinet installation, and general household maintenance. It provides stable and firm connections for daily indoor applications.
- Flexible Mounting: The round head with square neck design allows anti-rotation locking when installed into a pre-drilled square hole. The square neck holds the bolt in place and prevents rotation during installation.
- Usage Tips: Pre-drill square holes with 0.1mm tolerance for the square neck. Drill clearance holes 0.2–0.5mm wider than the bolt shank to avoid thread damage. Ensure proper hole sizes to prevent looseness or difficult installation. Store in a dry environment to maintain the surface condition.
Shipping Policy
Iterzen ships from the United States.
Most orders leave the warehouse within 1 business day and arrive in 2–7 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 Iterzen 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@iterzen.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 Iterzen replaces or refunds immediately, return shipping on us, and in most cases you won't need to send anything back.