IMSCREWS 5/16"-18 x 5" Heavy-Duty 304 Stainless Steel Carriage Bolts (2 PCS)

Substantial Support for Deep Timber Connections
The IMSCREWS 5/16" x 5" carriage bolt is designed for projects requiring extended reach and reliable structural support. With a 5-inch length, these bolts are well-suited for high-load joints, such as through-bolting thick timber beams or reinforcing heavy outdoor furniture. Built for framing, they offer the stability necessary for long-term use in garden structures, pergolas, and deck railings.

High Durability and Safety-Focused Design
Forged from 18-8 (304) stainless steel, these fasteners are highly resistant to corrosion in outdoor environments and are compatible with pressure-treated lumber. The smooth round head offers a clean appearance that reduces snagging hazards, making them an ideal choice for public benches, play sets, and railings. The integrated square neck prevents the bolt from spinning, allowing for easy, one-sided installation with a single wrench.

Specifications:
- Thread: 5/16"-18 Coarse; Length: 5" (Under Head)
- Material: 304 (18-8) Stainless Steel; Full Thread

FAQ:
Q: Drill bit size? A: A 5/16" bit provides a snug, structural fit.
Q: Salt air safe? A: Yes, 304 SS offers high resistance to coastal corrosion.

Pro-Tips:
1. Ensure the pilot hole is perfectly perpendicular for 5" bolts to avoid alignment issues across multiple timber layers.
2. Pair with a flat washer on the nut side to distribute load and protect wood fibers.

Key Features

• PREMIUM 304 STAINLESS STEEL Crafted from high-quality 18-8 (304) stainless steel, these carriage bolts offer superior rust and corrosion resistance. Ideal for long-term outdoor use, ensuring structural safety in humid and freshwater environments.
• ADJUSTABLE FULL THREAD DESIGN The 5-inch length features a full thread design, offering maximum flexibility for securing materials of various thicknesses. It ensures a tight, secure fit even when connecting thinner boards to thick beams.
• SELF-LOCKING SQUARE NECK Features a smooth rounded mushroom head and a precision square neck that bites into wood to prevent spinning. This self-locking mechanism allows for easy one-sided tightening during installation.
• VERSATILE OUTDOOR APPLICATIONS Engineered for professional structural construction and DIY repair. Well-suited for securing heavy beams in gazebos, deck posts, playground equipment, and outdoor furniture maintenance.
• SPECIFICATIONS & NOTE Package includes 2 pieces of 5/16-18 x 5 carriage bolts only. Nuts and washers are NOT included. We recommend pre-drilling a 5/16 hole and using manual tools to prevent thread galling.

Specifications

• ASIN: B0F2F665DJ
• Internal SKU: IMS0822
• Size: 5/16"-18 x 5"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 2