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Iterzen
50Pcs 5/16"-18x1-1/2 Carriage Round Head Square Neck Bolt 304SS
US$51.46
Arrives as soon as ✓ Free shipping — over $200Description
Product Details Color: Silver Item Dimensions: 3.15 x 1.06 x 8.66 inches Number of Items: 50 Unit Count: 50 Count Part Number: bol000701260319f Thread Size: 5/16"-18 Exterior Finish: Silver...
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: Silver
- Item Dimensions: 3.15 x 1.06 x 8.66 inches
- Number of Items: 50
- Unit Count: 50 Count
- Part Number: bol000701260319f
- Thread Size: 5/16"-18
- Exterior Finish: Silver
- Manufacturer Grade: 304 Stainless Steel
- Screw Head Style: Round
- Fastener Type: Carriage Bolt
- Thread Type: Unc
- Thread Style: Right Hand
- Material Type: Stainless Steel
- Finish Types: Bright
- Item Highlight: Silver Bright Finish Carriage Screws for Home DIY Projects, Furniture Assembly, Bed Frames
- Size Name: 5/16"-18x1-1/2"
- Number of Pieces: 50
- Fastener Size: 5/16"-18x1-1/2"
- Thread Coverage: Fully Threaded
- Set Name: 50Pcs 5/16"-18x1-1/2 Carriage Bolt 304SS
About this item
- Abrasive Material: 304 Stainless Steel with good strength, stability, and rust resistance. Surface treatment of screws adds extra protection for daily indoor/outdoor use. At the same time, high-grade 304 stainless steel delivers exceptional corrosion resistance in harsh environments—making it more durable than regular steel and zinc-plated fasteners. A square neck under the head prevents rotation during installation or use, providing anti-rotation locking and zero-maintenance integrity
- Material: 304 Stainless Steel; Color: Silver; Surface Treatment:Bright Finish; Screw Length: 1-1/2"; Screw Size: 5/16"-18; Screw Head Size: 3/16" x 11/16" (T x Dia); Product Includes: 50 Pcs Carriage Bolts
- Multi-Purpose: Widely used in various places such as electronics manufacturing, machinery and equipment, chemical industry, and automotive industry, for example, snowmobiles, trailers, and agricultural machinery.
- Flexible Mounting: Featuring a round head and square neck, this bolt locks securely against rotation when fitted into pre-drilled square holes. The square neck keeps the bolt fixed 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 sizing and store in a dry environment.
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.