Electro Hardware MS1047M17F61D Circuit Board Spacer M3

Product Description

The ELECTRO HARDWARE MS1047M17F61D is a round, female unthreaded circuit board spacer designed to maintain precise standoff clearance between a PCB and a mounting surface or adjacent board. Manufactured from Nylon Grade 101 to MIL-P-17091B, this metric spacer accepts an M3 screw and provides an overall length of 24 millimeters. The inside diameter ranges from 3.2 to 3.6 millimeters, and the outside diameter is 6 millimeters, giving it a compact round profile. Its nylon construction makes it electrically non-conductive and corrosion-resistant. It is installed by electronics technicians, PCB assembly shops, and field service engineers working on control boards in HVAC, industrial, and electrical enclosure applications.

This spacer is suited for metric PCB assemblies requiring consistent board-to-surface separation. The female unthreaded bore accommodates an M3 fastener passed through from the board side, securing the assembly while keeping the board elevated. Typical use cases include control board mounting in HVAC equipment, industrial control panels, and enclosure sub-assemblies where non-conductive standoffs are required to prevent shorts and absorb minor mechanical vibration. The MIL-P-17091B fastener standard designation reflects material and dimensional compliance suitable for demanding applications.

Key Features

• Nylon Grade 101 construction — electrically non-conductive and corrosion-resistant
• MIL-P-17091B compliant fastener standard for verified dimensional and material consistency
• Female unthreaded bore sized for M3 screw pass-through
• Overall length of 24 millimeters with a length tolerance of -0.13 to 0.13 millimeters
• Outside diameter of 6 millimeters with inside diameter range of 3.2 to 3.6 millimeters
• Round body profile for standard PCB mounting hole layouts

Compatibility

Designed as an OEM-style metric standoff spacer for PCB assemblies using M3 hardware, consistent with boards requiring a 6 millimeter OD round spacer and 24 millimeter standoff height.

Installation Notes

Installation is typically performed by electronics technicians or control board service professionals. Power down and de-energize the equipment fully before handling any PCB or control board assembly. Insert the spacer into the board mounting hole and pass the M3 fastener through from the component side, tightening to finger-snug plus a modest turn — avoid overtightening nylon spacers, as the material can crack under excessive torque. Follow applicable electrical enclosure and assembly standards such as IPC-A-610 where required by the application.