Electro Hardware P289M03F21256 Hex Standoff 2-56 3/16in

Product Description

The ELECTRO HARDWARE P289M03F21256 is a female hex circuit board standoff designed to create precise spacing between printed circuit boards and mounting surfaces. Machined from brass with a clear zinc chromate finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff accepts a 2-56 threaded fastener and provides a fully threaded internal bore with a thread depth of 3/16 inches. The overall length is 3/16 inches and the hex body measures 3/16 inches across the flats. Electronics technicians and electrical assemblers install these standoffs during PCB assembly and enclosure builds where controlled board-to-surface clearance is required.

This standoff is suited for use in low-voltage electronic assemblies, control panels, HVAC control boards, and similar applications where a compact 2-56 threaded female standoff is specified. The small form factor makes it appropriate for tight-clearance board layouts in residential and light commercial equipment. Its fully threaded bore allows a machine screw to engage the full thread depth, providing secure fastener retention in vibration-prone environments.

Key Features

• Female hex body style with fully threaded internal bore for secure screw engagement
• 2-56 thread size for compatibility with standard small-fastener PCB hardware
• 3/16 inch overall length with a length tolerance of -0.005 to 0.005 inches
• Brass construction with clear zinc chromate finish for corrosion resistance
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 fastener standards
• Hex body shape allows installation and removal with standard hex drivers

Compatibility

Designed as a standard 2-56 female hex circuit board standoff for use in PCB mounting applications that require an inch-measurement fastener system.

Installation Notes

Installation is typically performed by electronics technicians or electrical assemblers during board-level assembly or control panel wiring. De-energize all circuits before servicing any control board or enclosure. Use a hex driver or socket sized for 3/16 inch across-flats to seat the standoff without rounding the hex body. Avoid over-torquing, as brass fasteners are susceptible to thread damage under excessive load.