Electro Hardware S505-M10-F21-G Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S505-M10-F21-G is a round, female unthreaded circuit board spacer designed to maintain precise separation between a printed circuit board and a mounting surface. Built from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, it delivers reliable corrosion resistance in typical electronics enclosure environments. The spacer measures 0.125 inches in overall length, 0.25 inches in outside diameter, and 0.141 inches in inside diameter, accepting a No. 6 screw. Electronics assemblers, OEM technicians, and field service professionals working on control boards in HVAC, pool, and electrical equipment install this type of hardware during board mounting and replacement procedures.

This spacer is suited for use in residential and light commercial applications wherever a circuit board requires standoff clearance from a chassis or panel. Common install scenarios include HVAC control board mounting, electrical enclosure assemblies, and any application requiring a compact, low-profile standoff for a No. 6 fastener. The zinc-plated finish provides adequate protection in indoor enclosure environments. Its small footprint and standardized dimensions make it a practical fit across a wide range of circuit board mounting configurations.

Key Features

• Female unthreaded design accepts No. 6 screws for straightforward board mounting
• Zinc-plated Grade 2 steel finish meets ASTM B633 and QQ-S-633 Type 1 standards
• Compact 0.125-inch overall length suits tight enclosure clearances
• 0.25-inch outside diameter and 0.141-inch inside diameter with controlled tolerances
• Round body shape provides consistent contact footprint against board surface

Compatibility

Designed as a standard No. 6 screw circuit board spacer suitable for use in OEM and field-service board mounting applications across HVAC, electrical, and related control assemblies.

Installation Notes

Install and removal of circuit board spacers should be performed by qualified technicians. Always de-energize and lock out the equipment before servicing any control board assembly. Use hand tools sized for No. 6 fasteners and avoid over-torquing, which can deform the unthreaded bore. Follow applicable NEC or equipment manufacturer guidelines for control board mounting clearances.