Value Collection 581140PR Hex Socket Cap Screw 4-48 Unf

Product Description

The VALUE COLLECTION 581140PR is a hex socket cap screw sized at 4-48 UNF with a 3/32 inch hex drive and a 3/16 inch length under head. Manufactured from alloy steel and finished with a black oxide coating, this fastener delivers solid mechanical strength and modest corrosion resistance in a compact form factor. The fully threaded shank engages the entire length of the mating thread, making it well suited for tight assemblies where maximum thread engagement is required. It meets ASME/ANSI B18.3 and ASTM A574 standards, confirming dimensional accuracy and tensile strength appropriate for precision fastening applications.

This screw is used in light mechanical assemblies, instrumentation, small equipment housings, and precision fixtures where a low-profile internal-drive fastener is required. The black oxide finish reduces surface reflectivity and provides light rust resistance in dry or mildly humid environments. Machinists, maintenance technicians, and assembly workers typically install this fastener wherever space constraints prevent the use of a hex head. Minimum order quantity is 100 pieces per order.

Key Features

• Thread size 4-48 UNF for fine-thread engagement in close-tolerance assemblies
• Fully threaded shank maximizes thread contact over the 3/16 inch length under head
• Alloy steel construction provides high tensile strength relative to fastener size
• Black oxide finish reduces light reflection and adds mild corrosion resistance
• 3/32 inch hex drive accepts standard Allen keys and hex bit drivers
• Conforms to ASME/ANSI B18.3 and ASTM A574 dimensional and strength standards

Compatibility

Designed as a standard 4-48 UNF hex socket cap screw suitable for use in any threaded hole or insert tapped to 4-48 UNF specifications per ASME/ANSI B18.3.

Installation Notes

Installation is performed with a 3/32 inch hex key or Allen driver. Verify the mating thread is clean and free of debris before driving the fastener to prevent cross-threading in fine-thread applications. Do not exceed the rated torque capacity for a size 4 alloy steel fastener as specified by ASME standards. Always use calibrated tooling when torque consistency is critical to assembly integrity.