Value Collection -48548-8 Hex Socket Cap Screw 5/8-18 Unf

Product Description

The VALUE COLLECTION -48548-8 is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade service work. It carries a 5/8-18 UNF thread size and measures 4 inches in length under the head. The screw is machined from alloy steel and finished with a black oxide coating for corrosion resistance. Drive engagement is achieved with a 1/2 inch hex socket. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it a recognized choice for structural and precision fastening where dimensional and strength compliance matter.

This screw is suited for heavy-duty mechanical assemblies, equipment repair, and precision fastening in industrial settings. The fine 5/8-18 UNF thread pitch provides stronger thread engagement and better resistance to loosening under vibration compared to coarse thread equivalents. Typical applications include machinery frames, hydraulic components, motor mounts, and structural assemblies where a recessed drive head and high clamping force are required. Installation is performed by millwrights, machinists, and maintenance technicians working across manufacturing and field service environments.

Key Features

• 5/8-18 UNF fine thread for high-strength engagement and vibration resistance
• 4 inches length under head with partial threading for grip-zone fastening
• Alloy steel construction for high tensile and shear strength
• Black oxide finish provides moderate corrosion resistance and reduces light reflection
• 1/2 inch hex drive socket for reliable, tool-driven torque application
• Compliant with ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-fit fastener for mechanical assemblies requiring a 5/8-18 UNF partially threaded hex socket cap screw per ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 1/2 inch hex key or socket driver. Ensure the mating tapped hole is clean and free of debris before threading. Do not exceed the rated fastener torque for the alloy steel grade, and avoid cross-threading during initial engagement. Refer to applicable mechanical or equipment service documentation for torque specifications relevant to the assembly.