Electro Hardware 1337M12F21256 Hex Standoff 2-56 1-1/4 in

Product Description

The ELECTRO HARDWARE 1337M12F21256 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs or between a PCB and a mounting surface. The standoff features a 2-56 unified thread on both the male and female ends, a hex body measuring 3/16 inches across the flats, and an overall body length of 1-1/4 inches. Constructed from steel with a zinc-plated finish that meets ASTM B633 Type 1 and QQ-S-633 standards, this fastener is suited for electronics assembly, panel builds, and control board mounting in HVAC, electrical, and industrial enclosure applications.

This standoff is used in applications where circuit boards require secure, elevated mounting with a threaded male post on one end for stacking or attaching hardware and a threaded female receiver on the other end for accepting a mating screw or standoff. Typical install scenarios include control board mounting inside HVAC equipment, electrical panels, and industrial enclosures. The inch-system thread sizing and standard hex body make it compatible with common 2-56 fastener assemblies used across light-duty electronics and control board work.

Key Features

• Male-female configuration allows stacking of boards or mixed fastener attachment at each end
• 2-56 unified thread on both ends with a thread depth of 3/16 inches and thread length of 5/32 inches
• Hex body profile at 3/16 inches across the flats allows standard nut driver or hex tool installation
• Zinc-plated steel construction meets ASTM B633 Type 1 and QQ-S-633 corrosion-resistance standards
• Overall body length of 1-1/4 inches provides consistent PCB standoff height for controlled board clearance
• Length tolerance held to plus or minus 0.005 inches for precise assembly fitment

Compatibility

Designed as an OEM-style replacement or new-install fastener for 2-56 threaded circuit board standoff applications in inch-system assemblies, including control board mounting in residential and light commercial HVAC, electrical enclosures, and general electronics panel builds.

Installation Notes

Installation is typically performed by electricians, electronics technicians, or HVAC controls technicians. De-energize all equipment and discharge any capacitors before handling circuit boards or control assemblies. Use a correctly sized nut driver or hex tool matching the 3/16-inch across-flats dimension to avoid rounding the hex body. Follow applicable NEC guidelines when mounting control boards inside electrical enclosures.