Electro Hardware S1343-M10-F21-I Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1343-M10-F21-I is a round, female unthreaded circuit board spacer designed to maintain precise standoff distance between a PCB and a mounting surface or between stacked boards. Manufactured from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, it delivers corrosion resistance and dimensional consistency expected in production and service environments. The spacer measures 0.25 inches overall length with a 0.5 inch outside diameter and a 0.194 inch inside diameter, sized to accept a number 10 screw. Electronics technicians, panel builders, and field service technicians install this hardware during control board mounting in HVAC, electrical, and industrial panel applications.

This spacer is suited for use anywhere a number 10 fastener is used to secure a circuit board with a required standoff of 0.25 inches. Typical applications include residential and light commercial HVAC control boards, electrical enclosure PCB mounting, and general electronics assembly where a steel unthreaded female spacer is specified. The zinc-plated steel construction handles environments where mild corrosion resistance is needed without the cost of stainless. Length tolerance is held to plus or minus 0.005 inches, and inside diameter tolerance runs 0.000 to 0.010 inches, supporting repeatable installation across production quantities.

Key Features

• Female unthreaded design accepts a number 10 screw through the bore
• Overall length of 0.25 inches with tight length tolerance of plus or minus 0.005 inches
• Inside diameter tolerance of 0.000 to 0.010 inches for consistent fitment
• Grade 2 steel construction with zinc-plated finish per ASTM B633 and QQ-S-633 Type 1
• Round body shape, 0.5 inch outside diameter for stable board support
• Sold individually, packaged as single-piece quantity

Compatibility

Designed as a standard-dimension round circuit board spacer for use with number 10 fasteners in PCB mounting applications across HVAC control boards, electrical panels, and general electronics assemblies.

Installation Notes

Installation is performed by electronics technicians, panel builders, or qualified HVAC and electrical service professionals. Power down and de-energize the control panel or board assembly completely before handling any circuit board hardware. Use hand tools appropriate for number 10 fastener sizes and avoid over-torquing, which can crack PCB mounting holes. Follow applicable NEC guidelines when installing or replacing control boards in electrical enclosures.