Electro Hardware S1383-M10-F21-I Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1383-M10-F21-I is a round, female unthreaded circuit board spacer designed to maintain precise standoff clearance between a PCB and a mounting surface. Built from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, this spacer delivers corrosion resistance suitable for electronics assemblies in HVAC control boards, electrical enclosures, and industrial panel applications. It measures 0.875 inches overall length with a 0.5 inch outside diameter and a 0.194 inch inside diameter, sized for number 10 screw installations. Electronic technicians, panel builders, and field service technicians working on control boards use this spacer to provide consistent board-to-chassis separation and electrical isolation.

This spacer is suited for residential and commercial HVAC control board assemblies, electrical enclosures, and general-purpose PCB mounting applications requiring a number 10 screw size. Its steel construction and zinc-plated surface make it appropriate for indoor environments where light corrosion resistance is needed. Panel builders and controls technicians typically install these during board replacement or new panel assembly work where consistent standoff height is critical to safe and reliable circuit board operation.

Key Features

• Female unthreaded body accepts number 10 screws for straightforward PCB mounting
• Grade 2 steel construction meets ASTM B633 and QQ-S-633 Type 1 standards
• Zinc-plated finish provides corrosion resistance for electronics enclosure use
• Overall length of 0.875 inches with tight length tolerance of -0.005 to 0.005 inches
• Inside diameter tolerance of 0.000 to 0.010 inches ensures consistent screw fit
• Round body shape with 0.5 inch outside diameter for standard PCB footprint compatibility

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board assemblies using number 10 screw fasteners in HVAC controls, electrical panels, and general electronics enclosures.

Installation Notes

Installation is performed by electronics technicians, panel builders, or HVAC controls technicians. Always de-energize the control panel or circuit board assembly and follow applicable NFPA 70 (NEC) lockout/tagout procedures before handling PCBs or spacers. Use appropriate non-marring tools when seating spacers to avoid deforming the zinc plating or distorting the board mounting holes. Do not over-torque fasteners through the unthreaded bore, as this spacer is female unthreaded and relies on the mating screw for clamping force.