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1/4-20 x 1-1/2" (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 may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 23, 2026 12:34 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.
- 📉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
🚚 Shipping
Free Shipping
Product Details
✓Ready-to-Use Bolt Kits—16 Sets each containing a Carriage Bolt (1/4-20 thread size, 1.5" long), Hex Nut (fits 1/4-20 bolts), Flat Washer (1/4" Inner Diameter)
✓Length: 1-1/2 inch (38mm approx.) underhead length – measured from bottom of dome head to end of threads, includes square neck
✓Diameter of the head: 14.3-15.1mm; Height of the head: 3.2-3.7mm; Height of the square neck: 3.2-4mm;
✓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
1/4"-20
Exterior Finish
Black Oxide
Manufacturer Grade
Grade A
Head Style
Round
Color
Black
Fastener Type
Carriage Bolt
Brand
EASTLO
Thread Type
Right Hand
Thread Style
Right Hand
Item Hardness
Grade 5
