Value Collection -40217-1 Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION -40217-1 is a fully threaded hex socket cap screw designed for precision fastening applications in mechanical assemblies, maintenance work, and equipment fabrication. It features a 1/4-28 UNF thread size, a 5/8 inch length under the head, and a 3/16 inch hex drive socket. The fastener is manufactured from alloy steel and finished with a black oxide coating, which provides mild corrosion resistance and reduces light reflection. This cap screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for structural and mechanical applications where dimensional and tensile consistency are required.

This screw is suited for use in light industrial, MRO, and trade service applications where a fine-thread, socket-drive fastener is called for. The 1/4-28 UNF thread pitch is commonly used in applications requiring greater thread engagement or vibration resistance compared to coarse-thread equivalents. Typical install scenarios include securing brackets, housings, and mechanical components in HVAC equipment, electrical enclosures, and general mechanical assemblies. It is sold individually with a minimum order quantity of 50 pieces.

Key Features

• 1/4-28 UNF fine thread for increased thread engagement and vibration resistance
• Fully threaded shank along the 5/8 inch length under head
• 3/16 inch internal hex drive for standard hex key or Allen wrench installation
• Alloy steel construction meets ASTM A574 tensile requirements
• Black oxide finish provides mild corrosion protection and low-glare appearance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for any application requiring a 1/4-28 UNF fully threaded socket head fastener in alloy steel.

Installation Notes

Installation is typically performed by maintenance technicians, millwrights, or trade professionals using a 3/16 inch hex key or Allen driver. De-energize and lock out equipment before working on any assembly that requires fastener removal or replacement. Use a calibrated torque wrench when torque specifications are required by the equipment manufacturer. Do not substitute this fine-thread fastener in applications specifying coarse-thread (UNC) hardware without verifying thread compatibility in the mating component.