Electro Hardware S373M01F21C Circuit Board Spacer Brass

Product Description

The ELECTRO HARDWARE S373M01F21C is a round, female unthreaded circuit board spacer designed to maintain precise standoff distance between a PCB and a mounting surface or second board. Sized for No. 2 screw hardware, it measures 1.5 inches overall length with a 0.089 inch inside diameter and 0.1875 inch outside diameter. The body is brass with a zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1, offering corrosion resistance suitable for electronics enclosures in HVAC controls, electrical panels, and similar trade applications. Electricians, panel builders, and controls technicians are the typical installers.

This spacer is used wherever a No. 2 screw is required to stack or separate circuit boards at a controlled height in residential and light commercial equipment. Common applications include HVAC control board assemblies, electrical enclosures, and industrial control panels where board-to-board or board-to-chassis clearance must be maintained consistently. The 1.5 inch OAL makes it appropriate for applications requiring moderate standoff height with a compact outer profile.

Key Features

• Female unthreaded round body accepts No. 2 screw hardware on both ends
• Brass construction with zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1
• 1.5 inch overall length with tight length tolerance of -0.005 to 0.005 inches
• 0.089 inch inside diameter with tolerance of 0.000 to 0.010 inches
• 0.1875 inch outside diameter keeps footprint minimal on dense PCB layouts
• Inch measurement system; sold individually

Compatibility

Designed for use with No. 2 screw fasteners in standard inch-measurement PCB standoff applications. Suitable as a direct replacement or new installation spacer wherever a round female unthreaded brass spacer of this OAL and screw size is specified.

Installation Notes

Installation is performed by electricians or electronics technicians during board mounting or replacement procedures. De-energize all circuits and discharge any capacitors before handling PCBs or inserting spacers. Use appropriately sized No. 2 screws and avoid over-torquing, which can crack solder joints or deform the spacer bore. Follow applicable NEC guidelines for work inside electrical enclosures.