IMSCREWS 5/16"-18 x 5/8" Heavy-Duty 304 Stainless Steel Carriage Bolts (25 PCS)

Substantial Strength for Compact Connections
The IMSCREWS 5/16" x 5/8" carriage bolt is engineered for projects requiring high shear resistance in a compact, short-profile size. With a robust 5/16-inch diameter and a 0.625-inch length, these bolts are well-suited for joints where stability is critical but space is limited, such as mounting heavy-duty metal brackets to thin panels or reinforcing structural furniture frames. Built for durability, they offer the stability necessary for long-term use in residential DIY projects and industrial applications.

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 visible furniture joints and equipment assembly. 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: 5/8" (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. For thin metal applications, ensure the pre-drilled hole has a square slot or the material is soft enough for the square neck to seat properly.

Key Features

• Self-Locking Square Neck: Designed with a precision-forged square neck beneath the head that bites into wood or locks into square metal holes, preventing the bolt from spinning while the nut is tightened.
• Full Thread Maximum Grip: Features a fully threaded 5/8-inch shank that provides maximum grip and enhanced fastening power, ideal for shallow-depth timber connections and decorative hardware mounting.
• 304 Marine Grade Stainless: Forged from premium 18-8 (304) Stainless Steel for superior corrosion defense. Essential for outdoor furniture, fencing, and ACQ pressure-treated lumber.
• Heavy-Duty Fastening Power: The 5/16 diameter provides professional-grade shear resistance for medium-to-heavy projects. The 5/8 length is Well-suited for securing brackets to standard 1-inch (nominal) lumber.
• Snag-Free Aesthetic Finish: The smooth, domed round head provides a professional, low-profile finish without sharp edges, ensuring safety for playground equipment, garden benches, and furniture.

Specifications

• ASIN: B0F2F732Z3
• Internal SKU: IMS0775
• Size: 5/16"-18 x 5/8"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 25