Prime-Line 9063970 Carriage Bolts, 3/8 in.-16 X 6 in., Grade 18-8 Stainless Steel (10 Pack)

Prime‑Line carriage bolts provide strong, dependable fastening for wood‑to‑wood or wood‑to‑metal applications commonly found in home improvement and repair projects. Featuring a smooth, rounded head with a square neck, these bolts are designed to prevent turning during installation and deliver a clean, finished appearance on visible surfaces. Ideal for use in outdoor furniture, decks, fencing, gates, signage, and structural assemblies, Prime‑Line carriage bolts are intended for use with same‑size matching nuts and washers to ensure proper fit, improved load distribution, and a secure long‑lasting hold. Manufactured from quality materials for durability and corrosion resistance, they install easily with standard tools and perform reliably in both indoor and outdoor environments. Trusted by DIY homeowners and professionals across the U.S., Prime‑Line carriage bolts make it easy to complete projects with strength, stability, and a professional finish.

• Size: 3/8 inch-16 X 6 inch
• Features a smooth rounded head as opposed to a standard hex head
• Square shoulder allows for nut to be tightened or loosened
• Often used in cases where a protruding bolt head could cause injury
• Nuts and washers not included, ensure washers and nuts are same diameter
• Thread Type: Coarse, Thread Class: UNC-2A, Point Style: Blunt
• Specification(s) Met: ASME B18.5 and ASTM F593/1