1/4-20 x 4 Zinc Grade 5 Hex Head Cap Screw

Description

1/4-20 x 4 Grade 5 Zinc Hex Cap Screw is a medium-strength fastener made from medium-carbon steel with a zinc plating finish, commonly used in automotive and general construction 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 one of the most widely used fasteners in structural and mechanical assembly.

Grade 5 Zinc

• Grade 5 zinc hex cap screws offer significantly greater tensile strength than Grade 2, making them suitable for medium- to heavy-duty applications
• Commonly specified in automotive, construction, and general industrial applications requiring reliable, stronger holds

1/4-20 x 4 Grade 5 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
• Improved strength over Grade 2, with three radial lines on the head for easy grade identification

Common Uses

• Automotive assembly, suspension components, and engine mounting
• Structural construction, framing, and equipment fastening
• General industrial manufacturing and machinery assembly

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 5 bolts are identifiable by three radial hash marks on the head — always verify grade before use in structural applications