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Iterzen
Therwen 30 Pack 1/2" X 4" Black Ceramic Carriage Bolts, 307A Grade
US$79.18
Arrives as soon as ✓ Free shipping — over $200Description
Product Details Color: Black Item Dimensions: 8.07 x 6.69 x 2.95 inches Item Weight: 8.9 pounds Number of Items: 30 Unit Count: 30 Count Part Number: GFA-Therwen-2856 Thread Size: 1/2" x 4"...
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: Black
- Item Dimensions: 8.07 x 6.69 x 2.95 inches
- Item Weight: 8.9 pounds
- Number of Items: 30
- Unit Count: 30 Count
- Part Number: GFA-Therwen-2856
- Thread Size: 1/2" x 4"
- Exterior Finish: Ceramic Coated
- Manufacturer Grade: Grade 307A
- Screw Head Style: Round
- Fastener Type: Carriage Bolt
- Thread Type: Fully Threaded
- Thread Style: Fully Threaded
- Item Hardness: Grade 307A
- Head Type: carriage
- Screw Point Style: Round
- Compatible Groove Diameter: 0.5 inches
- Material Type: steel with ceramic anti-corrosion coating
- Finish Types: Black Ceramic Coated
- Item Highlight: Complete Kit with 30 USS Flat Washers and 30 Hex Nuts, 6" Thread, Rust Resistant Coating for Exterior Wood Construction
- Item Diameter: 0.5 inches
- Size Name: 1/2" x 4"
- Number of Pieces: 30
- Fastener Size: 1/2" x 4"
- Thread Coverage: Fully Threaded
- Outside Diameter: 0.5 inches
- Set Name: Therwen 30-Piece Carriage Bolt Kit
- Model: GFA-Therwen-2856
About this item
- Comprehensive Hardware Kit: our complete 30 pieces hardware kit includes every essential, 30 carriage bolts, 30 USS flat washers, and 30 hex nuts; Each component is perfectly sized to ensure secure fitment and optimal load distribution, eliminating the need for additional hardware in your projects
- Outdoor Fasteners: designed for excellence in outdoor wood construction, these carriage bolts are crafted from robust steel with a ceramic anti-corrosion coating; They provide reliable strength and long-lasting performance in decks, fences, pergolas, and other structural projects
- Optimized Threading for Maximum Grip: each 4-inch carriage bolt is fully threaded, , allowing for deep nut engagement; This design ensures strong clamping force on thick lumber and multi-layer wood assemblies, adding stability to your construction efforts
- Enhanced Corrosion and Weather Resistance: the black ceramic anti-corrosion coating delivers superior resistance to rust, moisture, and harsh weather conditions; This ensures that these bolts outperform standard zinc-plated alternatives and last longer in demanding outdoor environments
- Easy and Quick Installation: the round head and square neck of the bolts prevent spinning during installation, making assembly faster and more efficient; Ideal for deck framing, fencing, and pergolas, our design saves time while ensuring reliable structural connections
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.