Value Collection C703618 Hex Head Cap Screw 7/8-9

Product Description

The VALUE COLLECTION C703618 is a Grade 8 steel hex head cap screw sized 7/8-9 x 3-3/4 inches, designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. The partially threaded shank provides a smooth grip zone beneath the head, which is critical for bolted joint clamping loads. Manufactured to ASME B18.2.1 and SAE J429 standards, this fastener meets the dimensional and mechanical property requirements expected in trade and production environments. The uncoated finish makes it suitable for applications where a post-installation coating or plating will be applied, or where bare steel is acceptable.

This screw is used in general industrial maintenance, machinery assembly, structural steel connections, and heavy equipment repair where a high-strength UNC-threaded fastener is required. The 7/8-9 thread designation indicates a 7/8-inch nominal diameter with 9 threads per inch, conforming to the Unified National Coarse thread standard. It is commonly installed by millwrights, maintenance technicians, and ironworkers using standard hex drive tooling. The partial threading configuration suits through-bolt and clearance-hole applications where full thread engagement in a nut or tapped hole is required at the end of the fastener only.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 7/8-9 UNC thread, partially threaded with 3-3/4 inch length under head
• Meets ASME B18.2.1 and SAE J429 dimensional and mechanical standards
• Uncoated finish compatible with field-applied coatings or bare-steel assemblies
• Hex head drive for standard wrench or socket installation

Compatibility

Designed as an OEM-style replacement or standard-stock fastener for any application requiring a 7/8-9 UNC hex head cap screw in Grade 8 steel per ASME B18.2.1 and SAE J429.

Installation Notes

Installation should be performed by a qualified technician using a properly rated socket or open-end wrench sized for a 7/8-9 hex head fastener. Always verify that the mating thread or nut meets the same or compatible specification and grade before installation. Torque to the value specified by the equipment manufacturer or applicable structural standard for Grade 8 fasteners at this diameter. Do not reuse fasteners that show signs of thread damage, corrosion, or plastic deformation.