[300 BULK] Steel Black Oxide & Oil Carriage Bolts 5/16-18X4 1/2

Steel Black Oxide & Oil Carriage Bolts 5/16-18X4 1/2 — a durable fastening solution designed for wood and metal connections. These carriage bolts are crafted from steel and finished with a black oxide coating that is complemented by an oil treatment to enhance corrosion resistance and ease of use.

Size and compatibility: 5/16 inch diameter, 18 threads per inch (5/16-18 UNC), length 4 1/2 inches. The domed head and square neck under the head make installation simple and secure.

Key features

• Material: steel for strength and durability
• Finish: black oxide with oil for corrosion resistance and smoother installation
• Size: 5/16-18 x 4-1/2 in
• Design: carriage bolt with a domed head and square neck to prevent turning during tightening
• Applications: ideal for wood-to-wood and wood-to-metal connections, decking, furniture, frames, and industrial assemblies
• Installation tips: insert bolt through aligned holes, tighten nut on the opposite side with a washer

Why choose these carriage bolts? The black oxide finish provides a sleek, uniform look while the oil treatment helps resist rust and reduces galling during assembly. The square neck locks into wood or other softer materials to prevent the bolt from turning as you tighten the nut, ensuring a secure, flush fit.

Durability you can count on for projects both large and small. Stock up on these carriage bolts to keep on hand for decking, framing, cabinetry, and outdoor builds.