Electro Hardware MS1029M01F21D Circuit Board Spacer M3

Product Description

The ELECTRO HARDWARE MS1029M01F21D is a round, female unthreaded circuit board spacer designed for M3 screw applications in electronic assemblies. Manufactured from brass to ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this metric spacer features a zinc-plated finish for corrosion resistance. It measures 15 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 is -0.130 to 0.130 mm and the inside diameter tolerance is 0.000 to 0.270 mm, making it suitable for precision PCB standoff applications where consistent board-to-board or board-to-chassis clearance is required.

This spacer is used in residential and commercial electronic control board assemblies, HVAC control panels, industrial PCB mounting, and general electrical enclosure applications. It provides a rigid standoff between a circuit board and a mounting surface or adjacent board, preventing contact and allowing airflow or wiring clearance beneath the PCB. Electricians, electronics technicians, and HVAC control board service professionals typically install this type of hardware during new panel assembly or board replacement work.

Key Features

• Brass construction meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards for reliable performance
• Zinc-plated finish provides corrosion protection in panel and enclosure environments
• Female unthreaded design accepts M3 screws for secure PCB standoff mounting
• Tight length tolerance of -0.130 to 0.130 mm supports consistent board clearance
• Round body shape with 6 mm outside diameter fits standard PCB mounting footprints
• Minimum order quantity of 10 units suits service stock and small assembly runs

Compatibility

Designed as an OEM-style metric circuit board spacer for M3 screw applications in PCB mounting and standoff configurations across electronic control assemblies.

Installation Notes

Installation is typically performed by electronics technicians or licensed electricians during PCB assembly or control board service. De-energize and lock out all power to the panel or enclosure before handling circuit boards or mounting hardware. Use appropriately sized M3 fasteners and do not overtighten, as brass spacers can be damaged by excessive torque. Follow applicable NEC guidelines when working inside electrical enclosures.