Electro Hardware MS1019M17F16D Round Board Spacer M3

Product Description

The ELECTRO HARDWARE MS1019M17F16D is a round, female unthreaded circuit board spacer designed for M3 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 mechanical isolation between PCB layers or between a board and a mounting surface. It measures 10 mm (0.394 inches) overall length with a 6 mm (0.236 inches) outside diameter and an inside diameter ranging from 3.2 mm to 3.6 mm (0.126 to 0.142 inches). Manufactured to MIL-P-17091B fastener standard, it suits applications where a lightweight, non-conductive spacer is required.

This spacer is used in electronics assembly, control board mounting, and panel fabrication across HVAC, electrical, and industrial equipment. Typical applications include mounting circuit boards in control enclosures, creating standoff clearance between stacked PCBs, and securing boards away from metal chassis surfaces to prevent shorts. The female unthreaded design accepts an M3 screw passed through from the mounting surface side. It is appropriate for both original equipment assembly and field repair or board replacement work performed by electronics technicians and controls specialists.

Key Features

• Nylon Grade 101 construction provides electrical isolation and corrosion resistance
• Female unthreaded body accepts M3 screws without tapping
• 10 mm overall length with tight length tolerance of -0.13 mm to +0.13 mm
• Inside diameter tolerance of 0.000 to 0.270 mm for consistent M3 screw fit
• Uncoated bright finish — no coating to crack, flake, or add dimensional variation
• Meets MIL-P-17091B fastener standard

Compatibility

Designed for use in circuit board assemblies requiring an M3 screw size with a round, female unthreaded standoff spacer in a metric measurement system.

Installation Notes

Installation should be performed with the circuit board fully de-energized and any associated power supply disconnected before handling or repositioning boards. Use the appropriate M3 screw driver or bit to avoid stripping the mating fastener. Verify that the spacer inside diameter accommodates the specific M3 fastener shank tolerance before final assembly. Handle nylon spacers carefully to avoid deformation from overtightening, which can crack the body and reduce standoff effectiveness.