Value Collection 40556 Set Screw 1/2-13 X 3/4 in Grade 8 25pk

Product Description

The VALUE COLLECTION 40556 is a 1/2-13 x 3/4-inch knurled cup point set screw manufactured from Grade 8 alloy steel. Set screws of this type are fully threaded, headless fasteners used to secure a component — such as a pulley, collar, or gear — against a shaft by bearing force through the point. The knurled cup point provides a firm grip on the mating surface, resisting rotational and axial movement under load. Drive is via a 1/4-inch hex key. This fastener conforms to ASME/ANSI B18.3 and ASTM F912 standards. Sold in a package of 25 pieces.

This set screw is suited for use in mechanical assemblies found across HVAC equipment, industrial machinery, and general trade applications. Typical uses include locking shaft collars on blower assemblies, securing pulleys on belt-drive systems, and fixing hubs on motor shafts. The UNC 1/2-13 thread size is a common coarse-thread specification, making this fastener broadly applicable in equipment that accepts standard unified coarse hardware.

Key Features

• Knurled cup point provides positive grip and resists loosening under vibration
• Grade 8 alloy steel construction for high tensile strength applications
• 1/4-inch hex key drive for installation with standard Allen wrenches or hex-key drivers
• UNC 1/2-13 thread standard — compatible with common unified coarse tapped holes
• Conforms to ASME/ANSI B18.3 and ASTM F912 fastener standards
• Packaged in quantities of 25 for shop stock or service truck inventory

Compatibility

Designed as a standard-dimension replacement or stock fastener for any assembly using a 1/2-13 UNC tapped hole requiring a knurled cup point set screw per ASME/ANSI B18.3.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with fastener torque requirements for Grade 8 alloy set screws. De-energize and lock out any rotating equipment before installing or removing set screws on shaft assemblies. Use a properly sized 1/4-inch hex key to avoid rounding the drive socket. Do not exceed the rated torque for the thread size, and inspect the mating shaft or bore surface for damage before seating the knurled cup point.