IMSCREWS 1/2"-13 x 3-1/2" Heavy-Duty 304 SS Carriage Bolts (5 PCS)

Substantial Strength for Thick Structural and Marine Projects
The IMSCREWS 1/2" x 3-1/2" carriage bolt is engineered for high-load projects requiring maximum shear resistance and deep penetration. With a robust 1/2-inch diameter and an extended 3.5-inch length, these bolts are the ideal choice for securing industrial brackets, dock hardware, and 4x4 timber posts. The length is perfectly calculated to pass through heavy lumber while leaving sufficient thread for structural washers and nuts to ensure a snug, permanent connection. Built for longevity, they offer the stability required for outdoor pergolas, heavy fencing, and commercial timber framing.

Superior Durability and Safety-Focused Design
Forged from premium 18-8 (304) SS, these fasteners offer superior resistance to rust in coastal or humid environments. The smooth round head creates a clean, low-profile look that reduces snagging hazards, making them a safe choice for playground sets, railings, and residential decks. The integrated square neck locks the bolt into place, preventing spinning and allowing for easy, one-sided tightening from the nut side.

Quick FAQ:
- Drill Bit Size? Use a 1/2-inch drill bit for a snug, structural fit.
- How to Measure? Length is measured from under the head to the tip.
- Will they rust? No. 304 SS provides superior protection in outdoor environments.
- Heavy Duty? Yes. The 1/2" shank offers 25,000+ PSI shear strength for structural safety.

Specs: 1/2"-13 Coarse; Length: 3-1/2"; Material: 304 SS; Full Thread

Key Features

• Reinforced 1/2 Shank: The 1/2-inch diameter provides high shear strength for critical load-bearing joints in structural timber and heavy framing.
• 3.5-Inch Deep Reach: Specifically sized to penetrate standard 4x4 posts (3.5 actual thickness) or join multiple layers of thick dimensional lumber.
• Weather-Resistant 304 SS: Forged from 18-8 (304) stainless steel, offering high durability in humid environments and with pressure-treated lumber.
• Smooth Safety Head: The rounded, drive-free head minimizes snagging hazards while providing a clean, professional finish for visible hardware.
• Self-Locking Square Neck: The integrated square shoulder bites into wood to prevent rotation, enabling efficient one-sided installation from the nut side.

Specifications

• ASIN: B0F2F6CF4B
• Internal SKU: IMS0902
• Size: 1/2"-13 x 3-1/2"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 5