7/8-9 x 2 Yellow Zinc Grade 8 Hex Head Cap Screw

Description

7/8-9 x 2 Grade 8 Yellow Zinc Hex Cap Screw is a high-strength fastener made from heat-treated, medium-carbon alloy steel with a yellow zinc chromate coating, designed for heavy-duty and high-stress applications.

Hex cap screws have a flat bearing surface, a hexagonal head, and a partially or fully threaded shank. Their six-sided head allows for easy tightening with standard wrenches and sockets, making them the preferred choice for demanding structural and mechanical assemblies.

Grade 8 Yellow Zinc

• Grade 8 yellow zinc hex cap screws offer the highest tensile strength among standard zinc-finished hex cap screws, making them ideal for heavy-duty and high-stress applications
• The yellow zinc chromate coating provides enhanced corrosion resistance compared to standard zinc, while also serving as a visual identifier for the Grade 8 designation

7/8-9 x 2 Grade 8 Yellow Zinc Hex Cap Screw Features

• High torque capacity due to the six-sided head, allowing use with wrenches, ratchets, and impact drivers
• Versatile thread options available in partial or full thread configurations for different grip and holding requirements
• Maximum strength among standard zinc grades, with six radial lines on the head for easy grade identification

Common Uses

• Heavy machinery assembly, structural steel connections, and high-load equipment fastening
• Automotive applications, including suspension, drivetrain, and chassis components
• Industrial manufacturing, mining, and agricultural equipment

Application

• Only insert into a pre-drilled and, when required, tapped hole
• Use a wrench, socket, or impact driver sized to the hex head
• Pair with an appropriate nut and washer for through-bolting applications; use with a tapped hole when threading directly into material

Tips

• Always use a washer under the head to distribute load and prevent surface damage
• Hex cap screws are measured from directly under the head to the tip of the threaded shank
• Grade 8 bolts are identifiable by six radial hash marks on the head — always verify grade before use in critical applications