Electro Hardware MS1047M01F21D Circuit Board Spacer M3

Product Description

The ELECTRO HARDWARE MS1047M01F21D is a round, female unthreaded circuit board spacer designed for M3 screw applications in electronic assemblies. Constructed from brass with a zinc-plated finish meeting ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer provides reliable standoff and electrical isolation between PCBs and mounting surfaces. It measures 24 mm overall length with an outside diameter of 6 mm and an inside diameter ranging from 3.2 to 3.6 mm. The length tolerance runs -0.130 to 0.130 mm, and the inside diameter tolerance spans 0.000 to 0.270 mm, making it suitable for precision board mounting applications.

This spacer is intended for use in electronic control boards, HVAC control modules, electrical enclosures, and other PCB assemblies requiring a metric M3 standoff. It is commonly installed during board assembly or field replacement of control boards in residential and commercial equipment. Electricians, electronics technicians, and HVAC controls specialists working on circuit board mounting and replacement will find this spacer compatible with standard M3 metric fastener layouts.

Key Features

• Brass body with zinc-plated finish per ASTM B633 and QQ-B-626 Comp 22 Type 1 for corrosion resistance
• M3 screw size compatibility for metric PCB assemblies
• 24 mm overall length provides consistent board standoff height
• 6 mm outside diameter and 3.2 to 3.6 mm inside diameter for accurate fitment
• Female unthreaded design accepts M3 fasteners without tapping
• Tight length tolerance of -0.130 to 0.130 mm for precision applications

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board assemblies requiring M3 metric standoffs with a 24 mm overall length and 6 mm outside diameter.

Installation Notes

Installation should be performed by a qualified electrician or electronics technician. Always power down and de-energize the equipment fully before accessing any circuit board or control assembly. Use a torque-appropriate M3 fastener to seat the spacer without deforming the brass body. Follow applicable NEC guidelines and equipment manufacturer procedures when servicing control boards.