Electro Hardware MS1041M04F16D Round Board Spacer M3

Product Description

The ELECTRO HARDWARE MS1041M04F16D is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a PCB and a mounting surface or secondary board. 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, measures 21 mm in overall length, and features an inside diameter ranging from 3.2 to 3.6 mm with a 6 mm outside diameter. Electricians, electronics technicians, and PCB assembly professionals install this type of hardware during panel builds, control board mounting, and enclosure assemblies.

This spacer is suited for metric M3 fastener applications in residential and commercial electronics, control panel fabrication, and industrial PCB mounting. The aluminum construction keeps weight low while providing adequate rigidity for stacked board configurations. It is commonly used where a non-threaded female standoff is needed to maintain board-to-surface separation and allow screw-through assembly from one side. The 21 mm length suits applications requiring moderate standoff height between board layers or between a board and its mounting tray.

Key Features

• Female unthreaded body accepts M3 screws for pass-through fastening
• 21 mm overall length with a tight length tolerance of -0.130 to 0.130 mm
• Inside diameter of 3.2 to 3.6 mm with a tolerance range of 0.000 to 0.270 mm
• 6 mm outside diameter round body for compact footprint on crowded PCB layouts
• Aluminum grade T3 construction per QQ-A-225A Comp 2 fastener standard
• Bright uncoated finish — no coating thickness to account for in clearance calculations

Compatibility

Designed for use with M3 metric screw hardware in standard PCB standoff and spacer applications where a female unthreaded round aluminum spacer with a 6 mm outside diameter and 21 mm overall length is specified.

Installation Notes

Installation is performed by electronics technicians or electricians during PCB assembly or control panel fabrication. Power down and de-energize all circuits before working inside any enclosure or panel. Use appropriately sized M3 hardware and do not overtighten fasteners, as aluminum is softer than steel and threads in mating hardware can be damaged. Follow applicable assembly standards and enclosure codes for the end-use application.