IMSCREWS 5/16"-18 x 5" Extra-Long 304 Stainless Steel Carriage Bolts (10 PCS)

Substantial Support for Deep Structural Timber Connections
The IMSCREWS 5/16" x 5" carriage bolt is engineered for heavy-duty projects requiring maximum penetration and reliable structural support. With a robust 5/16-inch diameter and an extended 5-inch length, these bolts are well-suited for high-load joints where stability is critical, such as through-bolting multiple layers of dimensional lumber or securing heavy-duty brackets to thick beams. Built for durability, they offer the stability necessary for long-term use in outdoor structures, garden gazebos, and residential DIY projects.

High Durability and Safety-Focused Design
Forged from premium 18-8 (304) stainless steel, these fasteners are highly resistant to rust and corrosion in coastal or humid environments. The smooth round head offers a clean appearance that reduces snagging hazards, making them an ideal choice for railings, play sets, and benches. The integrated square neck prevents rotation, allowing for easy, one-sided installation with a single wrench from the nut side.

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

Pro-Tips:
1. Use a 5/16" drill bit to ensure a snug, structural fit for the square neck.
2. Pair with stainless steel flat washers and nuts on the nut side to distribute structural load and protect wood fibers.

Key Features

• Designed for Maximum Penetration: The massive 5-inch length is engineered for through-bolting oversized 6x6 structural posts and thick multi-layer timber frames where standard bolts fail to reach.
• Continuous Thread Support: Featuring a precision-cut full thread along the entire 5 shank, these bolts provide consistent clamping tension and superior pull-out resistance in deep-bore installs.
• Anti-Corrosive 304 Stainless: Forged from premium 18-8 (304) stainless steel, offering professional-grade defense against rust in high-moisture outdoor environments and ACQ treated wood.
• One-Tool Self-Locking Install: The square neck beneath the head bites deep into wood fibers, locking the bolt in place so you can tighten the nut from the opposite side without needing a backup wrench.
• Low-Profile Safety Head: The smooth, snag-free domed head provides a professional aesthetic while eliminating sharp catch points¡ªWell-suited for child-friendly play sets and high-traffic decks.

Specifications

• ASIN: B0F2F6MWB2
• Internal SKU: IMS0824
• Size: 5/16"-18 x 5"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 10