Electro Hardware MS1005M17F16F Circuit Board Spacer M4

Product Description

The ELECTRO HARDWARE MS1005M17F16F is a round, female unthreaded circuit board spacer designed for M4 screw applications in printed circuit board assemblies. Molded from Nylon Grade 101 and left uncoated with a bright finish, this spacer provides reliable board standoff and isolation without adding conductive material to the assembly. It measures 3 mm (approximately 0.118 inches) overall length, with an outside diameter of 6 mm (approximately 0.236 inches) and an inside diameter ranging from 4.2 mm to 4.8 mm (approximately 0.165 to 0.189 inches). It meets MIL-P-17091B fastener standards, making it appropriate for assemblies where military-specification hardware is required. Electronics assemblers, PCB technicians, and field service technicians handling control board work will encounter this type of hardware regularly.

This spacer is suited for use in residential and commercial electronic control assemblies, including HVAC control boards, electrical enclosures, and industrial PCB mounting applications. It is typically installed during board assembly or control board replacement procedures where consistent standoff height and electrical isolation between the board and chassis are required. The nylon construction prevents galvanic corrosion and eliminates the risk of shorting the board to a metal mounting surface.

Key Features

• Nylon Grade 101 construction provides electrical isolation and corrosion resistance
• Meets MIL-P-17091B fastener standard for use in specification-controlled assemblies
• Female unthreaded body accepts M4 screws for secure board mounting
• 3 mm overall length with tight length tolerance of -0.13 to 0.13 mm for consistent standoff height
• Round body shape with 6 mm outside diameter for stable surface contact
• Uncoated bright finish — no added material to affect dimensional or electrical properties

Compatibility

Designed as a standard M4 metric circuit board spacer for use in PCB mounting applications requiring a female unthreaded round standoff conforming to MIL-P-17091B.

Installation Notes

Installation is performed by electronics assemblers or technicians during PCB mounting or control board replacement. Always de-energize the equipment and discharge any stored capacitance before handling circuit boards or installing standoff hardware. Use hand tools only — power drivers risk cracking the nylon body or stripping the mating fastener. Follow the equipment manufacturer's torque and assembly sequence guidance for the host assembly.