Value Collection 101589PR Set Screw 1/2-20 X 1/2 Inch Grade 8

Product Description

The VALUE COLLECTION 101589PR is a cup point set screw designed for mechanical assemblies requiring a secure, vibration-resistant hold. Threaded 1/2-20 UNF with an overall length of 0.5 inches, this fastener is manufactured from alloy steel to Grade 8 specifications, delivering high tensile and proof load strength suitable for demanding industrial and trade applications. It is driven with a 1/4-inch hex key and conforms to ASME/ANSI B18.3 and ASTM F912 standards. Machinists, millwrights, and mechanical contractors install these fasteners in shaft-to-hub connections, collars, pulleys, and similar mechanical power transmission components.

This set screw is suited for use in rotating shaft assemblies, motor shaft collars, sprockets, gears, and similar mechanical components where a flush or below-surface fastener is required. The cup point bites into the shaft surface to resist rotational and axial movement. Applications span industrial machinery, HVAC equipment assemblies, and general mechanical fabrication. Minimum order quantity is 100 pieces per order, with individual unit packaging.

Key Features

• 1/2-20 UNF thread for fine-pitch, high-strength engagement
• Cup point geometry bites into shaft material to resist movement under load
• Grade 8 alloy steel construction for high tensile strength
• 1/4-inch hex drive compatible with standard hex keys and Allen wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Fractional inch measurement type for straightforward sizing verification

Compatibility

Designed as a standard 1/2-20 UNF cup point set screw for use in any mechanical assembly requiring ASME/ANSI B18.3-compliant Grade 8 alloy steel fasteners of this thread size and length.

Installation Notes

Installation requires a 1/4-inch hex key or Allen wrench. De-energize and lock out any machinery before installing or removing set screws from rotating assemblies, in accordance with applicable OSHA lockout/tagout procedures. Do not over-torque, as this can damage the shaft surface or strip the socket. Verify thread engagement and seating of the cup point fully against the shaft before returning equipment to service.