Electro Hardware 1303M12F21256 Hex Standoff 2-56

Product Description

The ELECTRO HARDWARE 1303M12F21256 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs or between a board and a mounting surface. The body is hex-shaped steel with a zinc-plated finish, meeting ASTM B633 Type 1 and QQ-S-633 standards. One end accepts a male threaded post; the other accepts a female threaded insert, both sized to 2-56 thread. Overall body length is 3/16 inch with a width across flats of 3/16 inch. This standoff is installed by electronics assembly technicians, field service engineers, and bench technicians working on control boards in HVAC, electrical, and industrial equipment.

This standoff is suited for light-duty PCB mounting applications where precise, repeatable board-to-board or board-to-chassis spacing is required. It fits residential and commercial control board assemblies, instrumentation panels, and general electronics enclosures. The 2-56 thread size makes it appropriate for small-format boards where fine threads and minimal footprint are required. Sold individually with a minimum order quantity of 10 units.

Key Features

• Male-female configuration allows stacking or board-to-chassis standoff mounting in a single fastener
• Hex body shape enables wrench-driven installation for consistent seating torque
• Zinc-plated steel construction provides corrosion resistance per ASTM B633 Type 1 and QQ-S-633
• 2-56 thread size suitable for small-format PCB applications
• Length tolerance of -0.005 to 0.005 inch ensures consistent board spacing across assemblies
• Lightweight at 0.11 pounds per package, minimizing added board weight

Compatibility

Designed as an OEM-style replacement or assembly component for circuit boards using 2-56 thread fasteners with a 3/16-inch standoff height.

Installation Notes

Installation is typically performed by electronics or controls technicians. Power down and de-energize all circuits before working on any control board assembly. Use a hex wrench or nut driver sized to 3/16-inch flats to seat the standoff without over-driving. Do not apply thread-locking compound unless specified by the board manufacturer, as it may interfere with future serviceability.