Value Collection 701300PR Button Socket Cap Screw 1-72

Product Description

The VALUE COLLECTION 701300PR is a button socket cap screw designed for applications requiring a low-profile fastener with a hex socket drive. Sized at 1-72 x 5/16 inch, it is fully threaded and manufactured from alloy steel with a black oxide coating. The black oxide finish provides a degree of corrosion resistance and reduces light reflection, which is useful in precision assemblies and mechanical enclosures. Hardness is rated at 36-43 HRC, meeting the mechanical requirements of ANSI/ASME B18.3 and ASTM F835. Licensed tradespeople and assembly technicians install this type of fastener where a standard hex cap screw head would interfere with adjacent components.

This screw is suited for light mechanical assemblies, instrument panels, electrical enclosures, and precision machine components where a flush or near-flush profile is required. The UNF thread standard and 3A thread fit class make it compatible with tapped holes dimensioned to inch fine-thread specifications. The button head profile allows surface contact over a broader bearing area than a socket head cap screw of the same thread size, distributing clamping load across a wider footprint.

Key Features

• Button head profile provides a low-profile, wide-bearing-area fastening solution
• Hex socket drive accepts a standard ball-end or straight hex key
• Alloy steel construction rated at 36-43 HRC hardness
• Black oxide coating reduces corrosion and minimizes light glare
• Fully threaded shank in UNF 1-72 configuration, 3A thread fit class
• Manufactured to ANSI/ASME B18.3 and ASTM F835 standards

Compatibility

Designed as an OEM-style fastener for tapped holes dimensioned to UNF 1-72 inch fine-thread specifications in mechanical, electrical, and precision instrument assemblies.

Installation Notes

Installation requires a correctly sized hex socket key or ball-end driver matched to the drive recess. Ensure the mating tapped hole conforms to UNF 1-72 specifications before driving the fastener. Do not use an oversized or worn driver, as stripping the socket on a button head fastener at this size is difficult to recover from. Follow applicable mechanical or electrical assembly codes for torque sequence and fastener reuse guidelines.