Value Collection 40452 Set Screw 1-8x1 in Cup Point Grade 8

Product Description

The VALUE COLLECTION 40452 is a cup point set screw designed for mechanical assemblies where a fastener must apply clamping or locking force without a protruding head. This screw features a hex drive socket requiring a 9/16-inch hex key and a cup point tip that bites into a shaft or mating surface to resist rotation and axial movement. Made from Grade 8 alloy steel, it delivers high tensile and torsional strength. The thread is 1-8 UNC — meaning 1-inch nominal diameter with 8 threads per inch on a Unified National Coarse pitch. Overall length is 1 inch. It meets ASME/ANSI B18.3 and ASTM F912 standards, making it appropriate for precision mechanical and industrial applications.

Cup point set screws in this size range are used in power transmission components such as shaft collars, sprockets, pulleys, couplings, and gears. Machinists, millwrights, and maintenance technicians typically install this fastener when securing a rotating or sliding component onto a keyed or unkeyed shaft. The cup point indents into the shaft surface, providing a positive mechanical lock under load. This size is common in commercial and industrial equipment where heavy-duty shaft retention is required.

Key Features

• Cup point tip creates a positive mechanical indent on the mating shaft surface for positive retention
• 1-8 UNC thread — 1-inch nominal diameter, 8 threads per inch, coarse pitch for fast engagement
• Grade 8 alloy steel construction provides high tensile and torsional strength
• 9/16-inch hex drive socket for standard hex key installation
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards
• Sold in a package quantity of 10

Compatibility

Designed as an OEM-style replacement or new-installation set screw for mechanical assemblies requiring a 1-8 UNC cup point fastener with a 1-inch overall length.

Installation Notes

Installation is performed with a 9/16-inch hex key; verify the key is fully seated in the socket before applying torque to avoid rounding the drive. De-energize and lock out any equipment before accessing rotating shaft assemblies per applicable OSHA lockout/tagout procedures. Do not exceed the rated capacity of the mating threaded hole, and inspect the shaft surface for damage or contamination before tightening. Alloy steel set screws should not be installed in applications where galvanic corrosion with dissimilar metals is a concern without appropriate isolation.