Value Collection 101635PR Set Screw 5/8-18 X 5/8 in Cup Point

Product Description

The VALUE COLLECTION 101635PR is a 5/8-18 UNF cup point set screw manufactured from Grade 8 alloy steel. Set screws are headless fasteners that thread fully into a tapped hole and bear directly against a mating surface to lock a component — such as a collar, gear, or pulley — onto a shaft. This screw measures 5/8 inch in length (overall) with a 5/16-inch hex drive and conforms to ASME/ANSI B18.3 and ASTM F912 dimensional and material standards. The cup point geometry creates a ring-shaped bite into the shaft surface, providing strong axial and rotational resistance under load. Machinists, millwrights, and maintenance technicians working in general industrial and mechanical assembly applications install this fastener.

This set screw is suited for general industrial machinery, power transmission assemblies, and mechanical component retention where a 5/8-18 fine-thread engagement is required. The fine UNF thread pitch provides higher thread engagement per unit length compared to coarse thread, making it a common choice where vibration resistance or finer torque adjustment is needed. Typical applications include locking shaft collars, sprockets, couplings, and hubs in light to heavy-duty mechanical assemblies. Installation requires a 5/16-inch hex key.

Key Features

• Cup point geometry bites into shaft surface for strong axial and rotational holding force
• 5/8-18 UNF fine thread for increased thread engagement and vibration resistance
• Grade 8 alloy steel construction for high tensile and hardness requirements
• 5/16-inch hex drive compatible with standard hex keys and L-wrenches
• Conforms to ASME/ANSI B18.3 and ASTM F912 standards

Compatibility

Designed as a standard replacement or stock fastener for any mechanical assembly requiring a 5/8-18 UNF cup point set screw with a 5/16-inch hex drive.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 5/16-inch hex key or Allen wrench. Ensure the mating threaded hole is clean and free of debris before installation. De-energize and lock out all rotating equipment before installing or removing set screws in power transmission applications. Do not exceed the torque capacity of the alloy steel fastener by using extension tools on the hex key.