Electro Hardware S1351-M04-F16-H Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1351-M04-F16-H is a round, female unthreaded circuit board spacer machined from aluminum grade T-3 to QQ-A-225A Comp 2 specification. It measures 0.375 inches overall length with a 0.5 inch outside diameter and a 0.171 inch inside diameter, sized for a No. 8 screw. The uncoated finish leaves the aluminum in its natural state. This spacer is used to maintain precise standoff distance between a printed circuit board and a mounting surface or secondary board layer. Electronics technicians and electricians working on control boards in HVAC, industrial, or panel applications install this type of hardware during board mounting and replacement work.

This spacer is suited for residential and commercial control board assemblies where a No. 8 fastener is used. Common applications include HVAC control board mounting, electrical panel sub-assemblies, and any circuit board installation requiring a fixed standoff. The female unthreaded bore accepts a No. 8 screw passed through from the board side. The round body shape and aluminum construction keep weight low while providing firm, stable support between board and chassis surfaces.

Key Features

• Female unthreaded bore sized for No. 8 screw installations
• 0.375 inch overall length provides consistent board standoff distance
• 0.5 inch outside diameter round body for stable surface contact
• 0.171 inch inside diameter with a tolerance of 0.000 to 0.010 inches
• Length tolerance held to -0.005 to 0.005 inches for precise stacking
• Aluminum grade T-3 per QQ-A-225A Comp 2 specification, uncoated finish

Compatibility

Designed as a standard inch-measurement circuit board spacer for No. 8 screw applications in residential and commercial electronic control board assemblies.

Installation Notes

De-energize all circuits and discharge any capacitors on the control board before handling or replacing board hardware. Install using hand tools appropriate for No. 8 fasteners; do not overtighten fasteners through the unthreaded bore as this can crack the board or deform the spacer. Installations inside electrical enclosures should follow applicable NEC guidelines for control board mounting and enclosure integrity.