Value Collection 701011PR Button Socket Cap Screw 1-72

Product Description

The VALUE COLLECTION 701011PR is a button socket cap screw designed for precision fastening in tight-clearance applications. It features a low-profile button head driven by a hex socket and is fully threaded along its 3/4-inch length under the head. Made from alloy steel with a black oxide finish, this screw meets ANSI/ASME B18.3 and ASTM F835 standards. The 1-72 thread size follows Unified Fine (UNF) specifications, and the 3A thread fit class ensures a controlled, precise mating with threaded holes. With a hardness rating of 36 to 43 HRC, this fastener delivers the shear and tensile strength demanded by mechanical assemblies and precision equipment.

This screw is suited for applications where a standard hex cap screw head would protrude too far or interfere with adjacent components. The button head profile is common in instrument panels, machine guards, electronic enclosures, and light mechanical assemblies. It is installed by machinists, millwrights, and maintenance technicians working on equipment that requires fine-thread fasteners in small diameters. The 1-72 thread size is frequently found in precision instruments, optical equipment, and small mechanical devices where thread engagement and load distribution must be tightly controlled.

Key Features

• Low-profile button head reduces interference in tight-clearance assemblies
• Hex socket drive allows torque application in confined spaces
• Alloy steel construction with 36 to 43 HRC hardness for high-strength fastening
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Fully threaded 3/4-inch length under head maximizes thread engagement
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 1-72 UNF 3A thread class button socket cap screw suitable for threaded holes conforming to ANSI/ASME B18.3 specifications in precision mechanical and instrument applications.

Installation Notes

Installation requires a hex socket driver sized for the 1-72 screw head. Always verify the mating threaded hole is clean and free of debris before driving the fastener. Do not exceed the recommended seating torque for the 1-72 thread diameter, and avoid using power tools without a torque-limiting clutch on small-diameter fasteners, as over-torquing can cause thread stripping or fastener failure. Follow applicable mechanical assembly standards for the specific application.