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5/16-18 x 1" (16 Sets) Carriage Bolts Black, 304 (18/8) Stainless Steel Carriage Screws with Hex Nuts and Flat Washers, Square Neck Round Dome Head, Coarse Thread
✅ In stock
⭐ Lowest price we've tracked
F
Grade
Analysis Confidence
73%
Price verified Sep 23, 2026 5:29 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price sits right around what this item typically fetches.
- 🏷️The retail sticker price has been slashed by 43% — a steep markdown from the official listing.
- 📉Our analysis places this at the most competitive price point we have ever tracked for this product — an exceptional moment to buy.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
20/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Eastlo
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Ready-to-Use Bolt Kits—16 Sets each containing a Carriage Bolt (5/16-18 thread size, 1" long), Hex Nut (fits 5/16-18 bolts), Flat Washer (5/16" Inner Diameter)
✓Length: 1 inch (25mm approx.) underhead length – measured from bottom of dome head to end of threads, includes square neck
✓Diameter of the head: 17.5-18.3mm; Height of the head: 4-4.5mm; Height of the square neck: 4-4.8mm;
✓Design feature: Big round domed head designed to eliminate the need for a washer; Square neck underneath the head helps self locking; Their strong holding power ensures the stability and reliability of your contructions; Use wrench or plier tools to turn the square neck to install them
✓Material: Premium 304 Stainless Steel with a wear-resistant black coating, engineered to outperform standard 304 stainless and zinc-plated fasteners. Combines unmatched strength and corrosion resistance for extreme environments (high heat, freezing temps, humidity) while maintaining a sleek, low-maintenance finish that resists fading
⚙️ Specifications
Material
Stainless Steel
Thread Size
5/16"-18
Exterior Finish
Black Oxide
Head Style
Round
Color
Black
Brand
EASTLO
Thread Style
Right Hand
Size
5/16-18 x 1"
Manufacturer
EASTLO
Package Dimensions
4.1 x 4 x 0.78 inches
Item Weight
11.9 ounces
