Value Collection 409138BR Set Screw 3/4-10 X 4-1/2 in Cup Point

Product Description

The VALUE COLLECTION 409138BR is a cup point set screw designed for clamping and locking applications in mechanical assemblies. Manufactured from Grade 2 alloy steel, it provides the hardness and shear strength needed to hold shafts, collars, pulleys, and similar components firmly in position. The 3/4-10 UNC thread and 4-1/2 inch length make it suitable for deeper engagement applications where standard-length fasteners fall short. Drive is square, which allows high torque input with minimal cam-out. This fastener is installed by maintenance technicians, millwrights, and industrial mechanics across a wide range of equipment and machinery.

This set screw is appropriate for use in shaft-to-hub connections, set collar locking, and general mechanical positioning tasks. The cup point geometry bites into the mating shaft surface to resist both rotational and axial movement under load. It is suited for both light-duty and moderate-duty holding applications in manufacturing, HVAC equipment assemblies, and industrial machinery maintenance. The 3/4-10 UNC coarse thread provides good resistance to vibration loosening and simplifies installation in standard threaded bores.

Key Features

• Cup point geometry bites into shaft surface for positive grip against rotation and axial movement
• Grade 2 alloy steel construction provides high hardness for reliable clamping force
• 3/4-10 UNC coarse thread for broad compatibility with standard threaded collars and hubs
• 4-1/2 inch length supports deep-reach engagement in thick-walled hubs or stacked assemblies
• Square drive allows high-torque installation with a standard square-drive wrench or bit

Compatibility

Designed as a general-purpose set screw for use in any 3/4-10 UNC threaded bore requiring a cup point fastener with a 4-1/2 inch engagement length.

Installation Notes

Installation is performed by maintenance mechanics or millwrights using a square-drive wrench or hex key adapter sized for the socket. De-energize and lock out all machinery before removing or installing set screws per OSHA lockout/tagout procedures. Do not over-drive the cup point into soft shaft materials, as this can cause surface damage that complicates future disassembly. Inspect the mating threaded bore for debris or damage before threading in the fastener.