Electro Hardware MS1031M04F16D Circuit Board Spacer M3

Product Description

The ELECTRO HARDWARE MS1031M04F16D is a round, female unthreaded circuit board spacer designed to provide precise standoff distance between PCBs and mounting surfaces or between stacked boards. Machined from aluminum grade T3 and left uncoated with a bright finish, this spacer meets the QQ-A-225A Comp 2 fastener standard. It accepts an M3 screw and measures 16 mm overall length with a 6 mm outside diameter and an inside diameter ranging from 3.2 mm to 3.6 mm. The lightweight aluminum construction keeps added mass minimal, with a unit weight of approximately 0.003 pounds. Electronics technicians, panel builders, and industrial electricians use this type of hardware during PCB assembly and enclosure builds.

This spacer is suited for use in control panels, industrial enclosures, HVAC control boards, and similar PCB mounting applications where a reliable M3-threaded standoff solution is required. The metric dimensioning and QQ-A-225A compliance make it appropriate for both commercial and light industrial assembly work. It is typically installed in applications requiring repeatable board-to-surface clearance and mechanical support during vibration or thermal cycling.

Key Features

• Female unthreaded body accepts M3 screws for straightforward PCB mounting
• 16 mm overall length with a tight length tolerance of -0.130 mm to 0.130 mm for consistent standoff height
• 6 mm outside diameter with 3.2 mm to 3.6 mm inside diameter range
• Aluminum grade T3 construction per QQ-A-225A Comp 2 fastener standard
• Bright uncoated finish suitable for standard indoor enclosure environments
• Round body shape for uniform fitment in standard PCB mounting holes

Compatibility

Designed as a standard metric M3 round circuit board spacer suitable for PCB assemblies and enclosure builds requiring a female unthreaded aluminum standoff with a 16 mm overall length and 6 mm outside diameter.

Installation Notes

Installation is performed by electronics technicians or electricians during PCB assembly or control panel builds. Power down and de-energize all circuits before servicing any board assembly. Use appropriate M3 fasteners and ensure mating surfaces are clean and free of debris before seating the spacer. Do not overtighten fasteners, as aluminum spacers can deform under excessive clamp load.