Electro Hardware S833-M01-F21-G Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S833-M01-F21-G is a round, female unthreaded circuit board spacer machined from brass and finished with zinc plating per ASTM B633, QQ-B-626 Comp 22 Type 1. It is sized for No. 6 screw applications with an overall length of 0.875 inches, an inside diameter of 0.141 inches, and an outside diameter of 0.3125 inches. This spacer provides a precise standoff between a PCB and a mounting surface or between stacked boards, maintaining board-to-board clearance and protecting traces from contact with chassis surfaces. Electricians, HVAC technicians, and electronics technicians install these as part of control board assemblies in residential and commercial equipment.

This spacer suits any application requiring a No. 6 screw standoff in an inch-measurement system. Typical uses include mounting control boards inside HVAC equipment, electrical enclosures, and industrial panels where consistent spacing and corrosion resistance are required. The zinc-plated brass construction holds up well in indoor environments with moderate humidity exposure. The female unthreaded bore accepts a No. 6 fastener and allows controlled stacking or panel standoff configurations during board assembly or field replacement work.

Key Features

• Female unthreaded round body sized for No. 6 screw applications
• Overall length of 0.875 inches with a length tolerance of -0.005 to 0.005 inches
• Inside diameter of 0.141 inches with a tolerance of 0.000 to 0.010 inches
• Outside diameter of 0.3125 inches for a compact footprint on dense PCB layouts
• Brass base material with zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1
• Inch measurement system for compatibility with standard imperial fastener tooling

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications using No. 6 screw hardware in inch-measurement assemblies.

Installation Notes

Electricians and electronics technicians install circuit board spacers as part of control board mounting procedures. De-energize all circuits and discharge any stored energy in the assembly before handling PCBs or installing fasteners. Use hand tools sized for No. 6 fasteners and avoid over-torquing, which can crack the board or distort the spacer bore. Follow applicable NEC guidelines when working inside electrical enclosures.