Electro Hardware S373M10F21E Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S373M10F21E is a round, female unthreaded circuit board spacer designed to maintain consistent standoff distance between a PCB and a mounting surface. Machined from Grade 2 steel with a zinc-plated finish meeting ASTM B633 and QQ-S-633 Type 1 standards, this spacer measures 1.5 inches overall length with a 0.116-inch inside diameter and a 0.1875-inch outside diameter. It accepts a No. 4 screw and is installed by HVAC technicians, electricians, and electronics assemblers wherever a reliable, corrosion-resistant PCB standoff is required.

This spacer is suited for use in residential and light commercial electronic assemblies, control board mounting applications, and panel enclosures where a No. 4 fastener is the specified screw size. Its zinc-plated steel construction makes it appropriate for indoor environments where mild corrosion resistance is needed. The female unthreaded body allows a screw to pass through cleanly, maintaining the correct board-to-chassis gap during assembly or field service replacement of control boards.

Key Features

• Grade 2 steel construction with zinc-plated finish per ASTM B633 and QQ-S-633 Type 1
• Female unthreaded round body accepts No. 4 screws
• 1.5-inch overall length with tight length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.116 inches with tolerance of 0.000 to 0.010 inches
• Outside diameter of 0.1875 inches for compact PCB standoff applications
• Inch measurement system; UNSPSC Code 31161816

Compatibility

Designed as an OEM-style replacement or new-installation standoff spacer for circuit board assemblies requiring a No. 4 screw, 1.5-inch female unthreaded round spacer in inch-system hardware applications.

Installation Notes

Installation is performed by qualified electricians or electronics technicians. Always de-energize and lock out the equipment before servicing any control board or panel assembly. Use the correct No. 4 fastener to avoid damaging the unthreaded bore. Follow applicable NEC guidelines and equipment manufacturer instructions when replacing or installing control board hardware.