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IMSCREWS 5/16-18 x 4-1/2 Heavy-Duty Carriage Bolts, 304 Stainless Steel (18-8), Full Thread Structural Coach Bolts for Thick Posts & Beams, 10 PCS
✅ In stock
F
Grade
Analysis Confidence
63%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 21, 2026 12:19 AM · 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 is slightly above the going rate for this product — worth watching for a drop.
- 🏷️The retail sticker price has been slashed by 66% — a steep markdown from the official listing.
- 📉Better-priced windows have occurred before, though not frequently — today's price is reasonably competitive.
- 📈Prices have been moving higher lately — waiting risks paying more if that momentum continues.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
5.88/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
IMSCREWS
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Extra-Long Structural Reach: The 4.5-inch length is specifically engineered for through-bolting thick structural posts and multi-layer timber beams, providing the reach needed for heavy framing.
✓Full-Thread Maximum Tension: Featuring a precision-cut full thread, these bolts ensure consistent clamping force and superior pull-out resistance throughout the entire deep-hole installation.
✓Outdoor-Ready 304 Stainless: Forged from 18-8 (304) stainless steel to withstand harsh weather and high humidity. Ideal for ACQ pressure-treated lumber, prevent rust streaks and degradation.
✓Anti-Spin Square Neck: The integrated square neck beneath the round head bites firmly into wood fibers, locking the bolt in place for effortless, one-sided installation without a second wrench.
✓Smooth, Safe Finish: The domed round head provides a professional, snag-free finish without sharp edges—essential for the safety of public decks, playground equipment, and outdoor furniture.
⚙️ Specifications
Material
Stainless Steel
Thread Size
5/16"-18
Exterior Finish
Stainless Steel
Head Style
Round
Color
Silver
Fastener Type
Carriage Bolt
Brand
IMSCREWS
Thread Style
Right Hand
Size
5/16"-18 x 4-1/2"
Metal Type
Stainless Steel
Head Type
Round
