Electro Hardware MS1041M17F16F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1041M17F16F is a round, female unthreaded circuit board spacer designed to maintain precise separation between PCBs and mounting surfaces in electronic assemblies. Manufactured from Nylon Grade 101 and compliant with MIL-P-17091B, this metric spacer is sized for M4 fasteners and features an overall length of 21 millimeters, an outside diameter of 6 millimeters, and an inside diameter ranging from 4.2 to 4.8 millimeters. The uncoated finish and nylon construction make it electrically non-conductive, which is an important characteristic when isolating circuit boards from grounded chassis panels or enclosures.

This spacer is used in electronic control panel assemblies, HVAC control boards, electrical enclosures, and similar applications where board standoff and mechanical support are required. It is appropriate for both residential and light commercial equipment builds and field repairs where M4 metric hardware is specified. Technicians working on control board replacements or panel upgrades will find this spacer useful for maintaining original board standoff heights during reinstallation.

Key Features

• Nylon Grade 101 construction provides electrical insulation and corrosion resistance
• MIL-P-17091B compliant for documented material and dimensional standards
• Female unthreaded body accepts M4 screws for straightforward installation
• 21 millimeter overall length with tight length tolerance of -0.13 to 0.13 millimeters
• 6 millimeter outside diameter with inside diameter range of 4.2 to 4.8 millimeters
• Uncoated bright finish — no additional coatings to affect dimensional fit or conductivity

Compatibility

Designed for use with M4 metric fasteners in circuit board standoff applications. Suitable for PCB mounting configurations requiring a 6 millimeter OD round spacer with a 21 millimeter standoff height.

Installation Notes

Power down all equipment and discharge any stored energy before servicing circuit boards or control panels. These spacers are installed by electronics technicians, HVAC controls technicians, and electricians during board mounting or panel assembly. Use appropriate M4 metric screws and ensure spacers are seated flush and perpendicular to the board surface to prevent stress on PCB mounting holes. Do not overtighten fasteners through nylon spacers, as the material can deform under excessive clamping load.