Electro Hardware S309M17F16E Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S309M17F16E is a round, female unthreaded circuit board spacer designed for use with 4 screw fasteners in printed circuit board assemblies. Molded from Nylon Grade 101 and left uncoated, this spacer provides reliable electrical isolation and mechanical standoff between PCBs and mounting surfaces. It measures 0.5 inches in overall length, with a 0.116 inch inside diameter and a 0.1875 inch outside diameter. The part meets MIL-P-17091B fastener standard, making it appropriate for assemblies where material and dimensional compliance is required. Licensed electricians, electronic technicians, and OEM assembly technicians typically install this component during board mounting operations.

This spacer is used in residential and commercial electronic assemblies, control panel builds, and industrial PCB mounting applications. It is suited for any scenario requiring a compact standoff with a 4 screw clearance hole in the inch measurement system. The female unthreaded bore accepts a 4 screw fastener passed through from the board side. Its small form factor and nylon construction make it a standard choice in control board layouts found across HVAC, electrical, and light industrial equipment.

Key Features

• Nylon Grade 101 construction provides electrical isolation and corrosion resistance
• Meets MIL-P-17091B fastener standard for dimensional and material compliance
• Female unthreaded design accepts 4 screw fasteners without threading into the spacer body
• Tight length tolerance of -0.005 to 0.005 inches supports consistent board standoff height
• Inside diameter tolerance of 0.000 to 0.010 inches ensures reliable screw clearance fit
• Uncoated finish maintains as-molded surface with no added chemical treatment

Compatibility

Designed as an OEM-style replacement or new-build component for circuit board assemblies requiring a 4 screw, female unthreaded round nylon spacer with a 0.5 inch standoff length in the inch measurement system.

Installation Notes

Installation is typically performed by electricians or electronics technicians during PCB assembly or control board service. Power down and de-energize the equipment fully before handling circuit boards or fasteners. Use hand tools only when seating or removing spacers to avoid cracking the nylon body. Follow applicable NEC guidelines and equipment manufacturer procedures when working inside control enclosures.