Value Collection C703082 Hex Head Cap Screw 5/16-18 X 4 in

Product Description

The VALUE COLLECTION C703082 is a Grade 8 steel hex head cap screw sized 5/16-18 x 4 inches with partial threading and an uncoated finish. Grade 8 is the highest common inch-series structural grade, offering significantly higher tensile and proof-load ratings than Grade 5 or Grade 2 fasteners. The partial thread configuration allows the unthreaded shank to bear shear loads across joint interfaces, making this screw suitable for applications where load transfer across the grip length matters. Manufactured to ASME B18.2.1, it meets standardized dimensional requirements for hex cap screws in the inch measurement system with UNC thread form.

This fastener is used across a broad range of mechanical, industrial, and equipment assembly applications where high-strength inch-series hardware is required. Typical scenarios include structural steel connections, machinery frames, brackets, and heavy-duty equipment fastening. The uncoated finish is suited to dry indoor environments or applications where a secondary coating, plating, or thread lubricant will be applied by the installer. Available in a package quantity of 50 pieces, making it practical for service stock or small-batch assembly work.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 5/16-18 UNC thread form per inch measurement standard
• 4-inch length under head with partial threading for shear-bearing shank
• Meets ASME B18.2.1 dimensional standard for hex cap screws
• Uncoated finish compatible with field-applied coatings or lubricants
• Sold in a 50-piece package quantity

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 5/16-18 UNC thread, 4-inch grip-length fastener conforming to ASME B18.2.1.

Installation Notes

Installation is typically performed by mechanics, millwrights, or maintenance technicians using standard hex wrenches or sockets sized for a 5/16-18 hex cap screw head. Always verify mating thread condition and clean threads before installation. Do not mix Grade 8 fasteners with lower-grade nuts or tapped holes not rated for the corresponding clamp load. Follow applicable equipment manufacturer torque specifications and relevant industry standards for the specific joint type.