3/8-16 x 5 Carriage Bolts - Galvanized Box/50

Overview

The 3/8-16 x 5 Carriage Bolts – Galvanized (05509) is designed for heavy-duty wood fastening applications requiring corrosion-resistant hardware. Supplied by Midwest Fastener, this box of 50 galvanized carriage bolts delivers a standardized, ready-to-use fastener solution for construction, outdoor structures, and general hardware projects.

Technical Specifications

Technical Features

• Domed head profile: The rounded, low-profile head sits flush and smooth on the surface, eliminating sharp protrusions that could cause injury or snag materials.
• Short square section under the head: This anti-rotation shoulder grips into the substrate — typically wood — and prevents the bolt from spinning while the nut is tightened, enabling single-sided installation without a secondary tool.
• 3/8-16 UNC thread: Coarse unified thread pitch provides strong thread engagement and is compatible with standard 3/8-16 nuts and hardware.
• 5-inch shank length: Accommodates fastening through thicker lumber, laminated beams, or stacked materials where shorter bolts would be insufficient.
• Galvanized finish: Zinc coating provides corrosion resistance, making these bolts suitable for outdoor, exposed, or moisture-prone environments.
• Sold in a box of 50: Bulk packaging supports job-site efficiency and reduces the need for frequent reordering on larger projects.

Applications

• Deck and fence construction where outdoor exposure demands corrosion-resistant fasteners
• Timber framing and structural wood connections requiring through-bolt assemblies
• Playground equipment, pergolas, and exterior wood structures
• General construction and carpentry requiring a secure, non-rotating bolt in wood substrates