Value Collection 701031PR Button Socket Cap Screw 4-40

Product Description

The VALUE COLLECTION 701031PR is a 4-40 UNC button socket cap screw engineered for precision fastening in tight-clearance assemblies. Manufactured from alloy steel with a black oxide coating, this screw delivers strong clamping force in a low-profile button head form. It meets ANSI/ASME B18.3 and ASTM F835 standards and carries a hardness rating of 36-43 HRC, making it suitable for demanding mechanical and structural applications. The 1/16-inch hex socket drive allows use with standard hex keys in confined spaces. Installation requires a licensed or qualified fastener technician or machinist familiar with metric and unified thread specifications.

This screw is a fully threaded 4-40 UNC fastener with a 3/4-inch length under the head and a right-hand thread direction. It is commonly used in light mechanical assemblies, electronics enclosures, instrumentation panels, and precision machine components where a flush or near-flush head profile is required. The black oxide finish provides mild corrosion resistance and a clean appearance in finished assemblies. This product is sold individually but requires a minimum order quantity of 100 pieces per order.

Key Features

• Button head profile provides low-profile clamping surface for tight-clearance installations
• Alloy steel construction with 36-43 HRC hardness for reliable clamping strength
• Black oxide coating for mild corrosion resistance and reduced surface glare
• Fully threaded 4-40 UNC right-hand thread with Class 3A thread fit for consistent engagement
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards
• 1/16-inch hex socket drive compatible with standard hex keys

Compatibility

Designed as a standard 4-40 UNC button socket cap screw replacement suitable for light mechanical assemblies, electronics enclosures, and precision equipment requiring ANSI/ASME B18.3 and ASTM F835 compliant fasteners.

Installation Notes

Installation should be performed by a qualified machinist, assembler, or technician familiar with unified thread standards. Use the correct 1/16-inch hex key to avoid stripping the socket drive. Ensure mating threads are clean and free of debris before fastening. Do not exceed the rated torque capacity for the thread size and hardness class of this fastener.