Value Collection 40219 Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION 40219 is a 1/4-28 UNF hex socket cap screw designed for precision fastening in mechanical assemblies, machine components, and structural applications. Manufactured from alloy steel with a black oxide finish, this fastener delivers reliable clamping force and corrosion resistance in both indoor and controlled-environment settings. The 3/16-inch hex drive socket accepts standard hex keys and Allen wrenches. With 1 inch of length under the head and full threading along the shank, this screw provides maximum thread engagement across a range of material thicknesses. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it a code-compliant choice for maintenance, repair, and fabrication work.

This screw is suited for applications requiring fine-thread engagement in metal-to-metal joints, close-tolerance assemblies, and equipment with vibration exposure where fine threads provide superior holding strength. Typical installation environments include industrial machinery, HVAC equipment frames, electrical enclosures, and mechanical panels. The black oxide coating reduces light reflection and provides a degree of surface protection in dry or lightly oiled environments. Sold individually with a minimum order quantity of 50 pieces, this screw is appropriate for technicians, fabricators, and maintenance professionals who need reliable fine-thread fasteners on hand.

Key Features

• 1/4-28 UNF fine thread for high holding strength and vibration resistance
• Fully threaded shank provides maximum thread engagement
• 3/16-inch hex socket drive compatible with standard Allen keys and hex wrenches
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish reduces surface corrosion in dry and lightly oiled conditions
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for use in any application requiring a 1/4-28 UNF fully threaded fastener with a 3/16-inch hex drive.

Installation Notes

Installation is performed with a 3/16-inch hex key or Allen wrench. Always ensure the mating threaded hole or nut is clean and free of debris before installation. Do not exceed the rated torque specification for the 1/4-28 alloy steel socket cap screw class as defined by ASME standards. Black oxide fasteners used in moisture-prone environments should be treated with a compatible oil or rust inhibitor after installation.