UNC Rib Neck Carriage Bolt SAE-5 (8.8) – ANSI B18.5 | High-Strength Round Head Bolt with Square Neck

Description

The UNC Rib Neck Carriage Bolt SAE-5 (Grade 8.8) conforms to ANSI B18.5 standards, designed with a round, dome-shaped head and a ribbed square neck that resists turning once installed. Ideal for use in heavy-duty fastening of wood-to-metal or metal-to-metal applications, these bolts offer strong, vibration-resistant performance in both structural and decorative assemblies.

Crafted from high-quality carbon steel or stainless steel, these bolts come in a variety of surface finishes including plain, black oxide, zinc electroplated, hot dip galvanized, copper plated, nickel plated, and zinc impregnated — enhancing corrosion resistance and durability in indoor and outdoor conditions.

Custom sizes and configurations are available through OEM support, based on customer drawings or samples.

Specifications:

• Standard: ANSI B18.5 (UNC Thread)

• Head Style: Round Head with Ribbed Neck

• Material: Carbon Steel, Stainless Steel

• Strength Grade: SAE-5 (8.8 Equivalent)

• Finish Options: Plain, Black Oxide, Zinc Electroplating, Hot Dip Galvanizing, Copper Plating, Nickel Plating, Zinc Impregnation

• Non-Standards: OEM Available (Based on Drawings/Samples)

Samples:
✔ Free samples provided for quality inspection

Packaging Options:
✔ Wooden Boxes
✔ Pallets
✔ Cartons
✔ Plastic Bags
✔ Nylon Bags

Applications:
✔ Structural Steel Assemblies
✔ Wood-to-Metal Joints
✔ Farm and Construction Equipment
✔ Outdoor Furniture
✔ Machinery and OEM Fastening
✔ Marine and Automotive Use