Electro Hardware S1423-M10-F21-I Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1423-M10-F21-I is a round, female unthreaded circuit board spacer machined from Grade 2 steel with a zinc-plated finish. It measures 1.5 inches overall length (OAL), 0.194 inches inside diameter (ID), and 0.5 inches outside diameter (OD), sized for No. 10 screws. The zinc plating meets ASTM B633 and QQ-S-633 Type 1 standards, providing corrosion resistance in typical indoor electrical enclosure environments. This spacer is used to maintain precise standoff distance between a PCB and a mounting surface, preventing shorts and allowing airflow beneath the board. HVAC technicians, electricians, and electronics assemblers commonly install these during control board replacements or panel builds.

This spacer suits applications where a No. 10 fastener is used to secure a circuit board within a control panel, electrical enclosure, or equipment chassis. The round body shape and female unthreaded bore allow a machine screw to pass through and clamp the stack without threading into the spacer itself. Typical installs include residential and light commercial HVAC control boards, industrial relay panels, and similar low-voltage electronics assemblies where consistent standoff height and board isolation are required.

Key Features

• 1.5 inches OAL provides consistent standoff height between PCB and mounting surface
• Female unthreaded bore accepts No. 10 screw pass-through without tapping
• 0.194 inches ID with a tolerance of 0.000 to 0.010 inches for secure screw fit
• 0.5 inches OD round body distributes clamping load evenly on board surface
• Grade 2 steel construction with zinc plating per ASTM B633 and QQ-S-633 Type 1
• Length tolerance of -0.005 to 0.005 inches ensures uniform stacking height

Compatibility

Designed as an OEM-style replacement or direct-install component for circuit board standoff applications requiring a No. 10 screw, 1.5 inches OAL, female unthreaded round steel spacer in inch-measurement systems.

Installation Notes

Power down and de-energize the control panel or equipment before servicing any circuit board or fastener assembly. This spacer is installed by electricians, HVAC technicians, or electronics assemblers using standard hand tools. Ensure the mating screw diameter is appropriate for the 0.194 inches ID bore before assembly. Follow applicable NEC guidelines when working inside electrical enclosures.