Value Collection 40555 Set Screw 1/2-13 X 1/2 in Grade 8 25pk

Product Description

The VALUE COLLECTION 40555 is a Grade 8 alloy steel set screw with a 1/2-13 UNC thread and an overall length of 0.5 inches. Featuring a knurled cup point, it is designed to grip and hold shaft components securely by biting into the mating surface under tightening torque. The 1/4-inch hex drive accepts a standard hex key for installation. Built to ASME/ANSI B18.3 and ASTM F912 standards, this fastener is suited for mechanical assemblies requiring reliable holding force. This package contains 25 pieces and is appropriate for maintenance technicians, millwrights, and mechanical contractors working on rotating shaft assemblies, pulleys, collars, and similar components.

The 40555 set screw is used in residential and commercial mechanical applications where a headless fastener is required to secure a component onto a shaft or inside a threaded bore. The knurled cup point provides enhanced grip compared to a plain cup point, making it a common choice for shaft collars, sprockets, gears, and motor couplings. Sold in a 25-piece package, this SKU suits both service calls requiring a small quantity and shop stock replenishment. Minimum order quantity is 1 package of 25.

Key Features

• Knurled cup point for increased bite and holding power on shaft surfaces
• 1/2-13 UNC thread ensures compatibility with standard inch-series threaded bores
• Grade 8 alloy steel construction for high tensile and torsional strength
• 1/4-inch hex drive accepts standard hex keys for controlled installation
• Conforms to ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• 25-piece package suits both field service and shop stock needs

Compatibility

Designed as a standard 1/2-13 UNC headless set screw for use in any threaded bore meeting ASME/ANSI B18.3 specifications; compatible with standard shaft collars, couplings, pulleys, gears, and similar mechanical components accepting a 1/2-13 thread.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a properly sized 1/4-inch hex key. De-energize and lock out all rotating equipment before installing or removing set screws per OSHA lockout/tagout procedures. Do not use an impact driver or oversized hex key, as this can damage the drive socket or strip the thread. Torque to the fastener manufacturer's specification for the thread size and grade being used.