Electro Hardware MS407M17F16C Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE MS407M17F16C is a round, female unthreaded circuit board spacer designed to maintain precise clearance between a PCB and a mounting surface or between stacked boards. Manufactured from Nylon Grade 101 and supplied uncoated, this spacer accepts an M2.5 screw and provides an overall length of 4.0 mm (approximately 0.157 inches). The inside diameter ranges from 2.7 mm to 3.1 mm (approximately 0.106 to 0.122 inches) with an outside diameter of 4.5 mm (approximately 0.177 inches). It meets MIL-P-17091B fastener standards, making it a suitable choice for electronics assembly work requiring controlled standoff height and consistent spacing. Electronics technicians and PCB assembly professionals install this type of spacer during board mounting and chassis integration tasks.

This spacer is used in residential and commercial electronics assembly, PCB mounting applications, and industrial control panel builds where a compact nylon standoff is required. It is well suited for environments where electrical isolation between the board and chassis is important, as nylon provides inherent non-conductive properties. The M2.5 thread size is common in light-duty PCB mounting hardware found in HVAC control boards, electrical enclosures, and similar low-voltage panel assemblies. It is sold individually with a minimum order quantity of 10 units per order.

Key Features

• Female unthreaded body accepts M2.5 screws for secure PCB standoff mounting
• Nylon Grade 101 construction provides electrical isolation and corrosion resistance
• Meets MIL-P-17091B fastener standard for consistent dimensional quality
• Compact 4.0 mm overall length suits tight PCB-to-chassis clearance requirements
• Uncoated bright finish; no secondary treatment required
• Round body shape simplifies installation and alignment during board assembly

Compatibility

Designed as a standard M2.5 metric round circuit board spacer suitable for general PCB mounting and chassis standoff applications where a female unthreaded nylon spacer conforming to MIL-P-17091B is specified.

Installation Notes

Installation is typically performed by electronics technicians or PCB assembly professionals. Power down and de-energize all circuits before mounting or replacing board spacers in any control panel or enclosure. Use the appropriate M2.5 screwdriver or hex tool as required by the mating fastener. Do not overtighten mating screws, as nylon spacers are not rated for the same clamping loads as metal standoffs and can deform under excessive torque.