IMSCREWS 3/8"-16 x 2-1/2" Heavy-Duty 304 Stainless Steel Carriage Bolts (20 PCS)

Substantial Strength for Heavy Structural and Marine Projects
The IMSCREWS 3/8" x 2-1/2" carriage bolt is engineered for structural projects requiring significant load-bearing capacity and professional durability. With a robust 3/8-inch diameter and a strategic 2.5-inch length, these bolts are the ideal choice for securing deck hardware, dock structural plates, and heavy timber-to-timber connections. The length is perfectly suited for passing through 1.5-inch actual thickness lumber while leaving sufficient thread for heavy-duty washers and nuts to ensure a snug, permanent connection. Built for longevity, they offer the stability required for outdoor pergolas, heavy fencing, and commercial-grade timber framing.

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

Specifications:
- Thread Size: 3/8"-16 Coarse (UNC); Length: 2-1/2" (Under Head)
- Material: 304 (18-8) Stainless Steel; Full Thread

Pro-Tips:
1. Use a 3/8" drill bit to ensure a snug, structural fit for the square neck.
2. Pair with 304 SS flat washers and hex nuts to distribute structural loads and protect wood fibers.

Key Features

• Heavy-Duty 3/8 Shank: Engineered for maximum structural integrity, the 3/8-inch diameter offers industry-leading shear resistance, outperforming 1/4 or 5/16 bolts in high-load applications.
• Versatile 2.5-Inch Reach: The ideal length for securing 4x4 posts, joining double 2x lumber (with countersinking), or attaching heavy-duty iron brackets to structural beams.
• Marine-Grade 304 Stainless: Forged from 18-8 (304) stainless steel, ensuring long-term rust protection in outdoor gardens, poolside structures, and with ACQ treated lumber.
• Tamper-Resistant Safety: The smooth domed head eliminates sharp edges and prevents exterior removal, making it Well-suited for child-safe playgrounds, public benches, and gates.
• Self-Locking square Neck: The precision square shoulder bites deep into wood to prevent spinning, allowing you to tighten the nut from the back with a single wrench.

Specifications

• ASIN: B0F2F8V9KQ
• Internal SKU: IMS0851
• Size: 3/8"-16 x 2-1/2"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 20