Value Collection 581815BR Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION 581815BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 1-8 UNC thread size and measures 9 inches in length under the head. Drive engagement is handled by a 3/4-inch hex socket. The fastener is manufactured from alloy steel and finished with a black oxide coating that provides mild corrosion resistance and reduces light reflection. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding load-bearing installations. Machinists, millwrights, and maintenance technicians are the primary installers.

This cap screw is suited for use in machine tool assemblies, heavy equipment, fixtures, and structural mechanical connections where a recessed-drive, high-strength fastener is required. The partial threading allows for better shank grip in through-bolt and tight-tolerance bore applications. The 1-8 UNC coarse thread profile is widely used in general industrial and OEM manufacturing contexts.

Key Features

• 1-8 UNC coarse thread for broad compatibility in standard imperial fastener applications
• 9-inch length under head provides extended grip range for thick material stacks
• 3/4-inch hex socket drive for high-torque installation with standard hex keys or socket drivers
• Partially threaded shank improves alignment and shear strength in through-hole applications
• Alloy steel construction meets ASTM A574 for high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and a non-reflective appearance

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in applications requiring a 1-8 UNC thread and 9-inch under-head length in imperial fastener assemblies.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician using a calibrated torque wrench and the correct 3/4-inch hex key or socket driver. De-energize or lock out any machinery before fastener installation or removal per applicable OSHA lockout/tagout procedures. Do not use an impact driver without proper torque control, as alloy steel cap screws can fracture under sudden shock loading. Inspect threads for damage before installation and apply thread lubricant if specified by the equipment manufacturer.