Electro Hardware P293M12F21256 Hex Standoff 2-56 1/4in

Product Description

The ELECTRO HARDWARE P293M12F21256 is a female hex circuit board standoff designed to create fixed spacing between printed circuit boards and mounting surfaces or between stacked boards. Machined from steel with a clear zinc chromate finish meeting ASTM B633 Type 1 and QQ-S-633 standards, this standoff accepts a 2-56 thread and measures 0.25 inches overall length with a 3/16-inch width across the hex flats. It is fully threaded to a depth of 0.25 inches. Electricians, electronics technicians, and panel builders install these fasteners during board-level assembly in control panels, enclosures, and electronic subassemblies.

This standoff is suited for low-density PCB mounting applications where a small-diameter, fine-pitch thread is required. Typical installations include residential and light commercial HVAC control boards, industrial control panels, relay boards, and custom electronic enclosures. The hex body allows torquing with standard hex drivers or wrenches, keeping the standoff secure during repeated service cycles. The compact 1/4-inch length is appropriate for applications requiring minimal board-to-surface clearance.

Key Features

• 2-56 female thread accepts matching 2-56 male fasteners for secure board stacking or panel mounting
• Fully threaded interior with 0.25-inch thread depth for maximum thread engagement in a short body
• Hex body profile at 3/16 inches across flats allows standard hex tool installation
• Steel construction with clear zinc chromate finish provides corrosion resistance per ASTM B633 Type 1 and QQ-S-633
• Compact 0.25-inch overall length suits tight board-to-surface clearance requirements
• Inch measurement system with tight length tolerance of plus or minus 0.005 inches

Compatibility

Designed as an OEM-style replacement or service fastener for circuit board mounting applications requiring a 2-56 female hex standoff in the 1/4-inch length range.

Installation Notes

Installation is performed by electronics technicians, electricians, or qualified HVAC service professionals during board assembly or control panel construction. Power down and de-energize all circuits before servicing any control board or panel assembly. Use a correctly sized hex driver or nut driver matching the 3/16-inch across-flats dimension to avoid rounding the hex body. Do not overtighten, as the 2-56 thread is a fine, small-diameter fastener that is susceptible to thread stripping.