Holo-krome 72010 Hex Socket Cap Screw 3-48 Unc Alloy Steel

Product Description

The HOLO-KROME 72010 is a hex socket cap screw designed for precision fastening in tight-clearance applications where a standard hex head wrench cannot reach. Sized at 3-48 UNC with a 3/16 inch length under head, this fastener is fully threaded and driven with a 5/64 inch hex socket. It is manufactured from alloy steel and finished with a black oxide coating, which provides moderate corrosion resistance and reduces light reflection in exposed assemblies. Machinists, millwrights, and field technicians use this type of cap screw for fixture work, jig assembly, and equipment panel fastening.

This screw is suited for light-duty mechanical assemblies requiring a flush or near-flush fastener profile. Its small diameter and fine 48-pitch thread make it common in instrument panels, electronics enclosures, precision equipment frames, and miniature mechanical components where controlled clamping force and minimal footprint are needed. The black oxide finish is appropriate for indoor or low-moisture environments.

Key Features

• 3-48 UNC thread form for fine-pitch engagement in small tapped holes
• Fully threaded along the 3/16 inch length under head for maximum thread engagement
• 5/64 inch hex socket drive compatible with standard ball-end hex keys and T-handle drivers
• Alloy steel construction for higher tensile strength than standard steel fasteners
• Black oxide finish for mild corrosion resistance and low-glare appearance
• Meets ASME B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-spec fastener for applications requiring a 3-48 UNC hex socket cap screw per ASME B18.3 and ASTM A574.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 5/64 inch hex key or socket driver. Ensure the receiving tapped hole is clean and free of debris before threading. De-energize or lock out any equipment before accessing fastener locations on live machinery. Do not exceed the rated torque range for a 3-48 alloy steel cap screw as specified by the applicable engineering standard or OEM documentation.