Value Collection 581152PR Hex Socket Cap Screw 4-48 Unf

Product Description

The VALUE COLLECTION 581152PR is a hex socket cap screw designed for precision fastening applications requiring a compact, high-strength threaded fastener. Threaded 4-48 UNF fully along its 5/8-inch length under head, this screw accepts a 3/32-inch hex drive for installation with standard Allen keys or hex bit drivers. Manufactured from alloy steel and finished with a black oxide coating, it delivers solid mechanical performance with moderate corrosion resistance in controlled environments. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for applications where dimensional and strength compliance is required by specification. Machinists, maintenance technicians, and precision assemblers are the typical installers.

This screw is suited for light mechanical assemblies, instrumentation, tooling fixtures, and precision equipment where fine-thread engagement is needed in tight spaces. The 4-48 UNF thread series is a fine-pitch designation commonly used in small assemblies that require increased thread engagement strength and reduced backlash compared to coarse-thread alternatives. The black oxide finish is appropriate for interior or dry-environment applications where mild surface protection is acceptable. These screws are sold in minimum order quantities of 100 pieces per order.

Key Features

• 4-48 UNF fine thread for high thread-engagement strength in small assemblies
• 5/8-inch length under head, fully threaded along entire shank
• 3/32-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide coating provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standard

Compatibility

Designed as a standard-dimension hex socket cap screw per ASME/ANSI B18.3 for use in any application requiring a 4-48 UNF fully threaded socket head fastener with a 3/32-inch hex drive.

Installation Notes

Install using a calibrated 3/32-inch hex key or hex bit driver to avoid rounding the drive socket. Verify that the mating tapped hole conforms to 4-48 UNF thread form and depth before installation. Black oxide finished fasteners are not rated for outdoor or high-humidity environments without additional protective measures. Follow applicable torque guidelines for size 4 alloy steel fasteners per your applicable engineering specification or assembly standard.