Value Collection 701033PR Button Socket Cap Screw 4-40

Product Description

The VALUE COLLECTION 701033PR is a button socket cap screw designed for applications requiring a low-profile head with reliable clamping force. The screw features a 4-40 UNC thread, a 1-inch length under the head, and is fully threaded along its entire shank. It is driven by a 1/16-inch hex socket. Manufactured from alloy steel with a black oxide coating, this fastener delivers corrosion resistance and a dark matte finish suited for mechanical assemblies, electronic enclosures, and precision equipment. Hardness is rated at 36-43 HRC per ASTM F835 requirements.

This screw is a standard choice in light mechanical and electronic assembly work where a flush or near-flush head profile is needed. The button head style distributes clamping load over a wider bearing surface than a flat head, making it common in sheet metal work, panel mounting, and instrument fabrication. The black oxide finish helps reduce light reflection and provides mild surface protection in dry indoor environments. It is installed by machinists, assembly technicians, and maintenance trades working on precision or electronic equipment.

Key Features

• 4-40 UNC fully threaded shank with right-hand thread direction
• Button head profile provides low clearance and broad bearing surface
• 1/16-inch hex socket drive for use in tight or recessed locations
• Alloy steel construction rated 36-43 HRC for consistent strength
• Black oxide coating reduces reflection and adds mild corrosion resistance
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or standard hardware component for assemblies requiring a 4-40 UNC button socket cap screw per ANSI/ASME B18.3 and ASTM F835 specifications.

Installation Notes

Install and remove using a 1/16-inch hex key or Allen driver. Power down or de-energize any electrical enclosure before servicing fasteners in live assemblies. Do not exceed the torque rating specified by the host assembly design, as the small 4-40 thread is susceptible to overtorque damage. Thread fit class 3A is intended for standard close-tolerance applications.