Electro Hardware S293M17F16E Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S293M17F16E is a round, female unthreaded circuit board spacer designed to maintain precise standoff distances between a PCB and a mounting surface or adjacent board. Sized at 0.25 inches overall length with a 0.1875 inch outside diameter and a 0.116 inch inside diameter, this spacer fits a number 4 screw thread. It is molded from Nylon Grade 101 to MIL-P-17091B specification and ships uncoated. Electronics technicians, field service engineers, and board-level assembly professionals use this type of hardware when mounting control boards in HVAC equipment, electrical panels, and other enclosures where consistent PCB clearance is required.

This spacer is suited for control board mounting applications in residential and light commercial equipment. It is typically installed during PCB assembly or field replacement of integrated control boards, ignition modules, variable-speed drive boards, and similar components where insulating standoff hardware is specified. The nylon construction provides electrical isolation between the board and the chassis. The female unthreaded body accepts a number 4 screw passed through the board and into the spacer, holding the board securely without metal-to-metal contact.

Key Features

• Nylon Grade 101 construction per MIL-P-17091B for consistent material properties and electrical isolation
• Female unthreaded bore sized for number 4 screw with 0.116 inch inside diameter
• 0.25 inch overall length maintains a controlled standoff gap between PCB and mounting surface
• Round body with 0.1875 inch outside diameter fits standard PCB mounting hole patterns
• Uncoated bright finish — no added coating to affect dimensional tolerances or insulation properties
• Inside diameter tolerance of 0.000 to 0.010 inches and length tolerance of -0.005 to 0.005 inches for consistent fit

Compatibility

Designed as an OEM-style standoff spacer for number 4 screw mounting applications on printed circuit boards in HVAC controls, electrical enclosures, and similar electronic assemblies requiring insulating hardware to MIL-P-17091B standards.

Installation Notes

Installation is performed by electronics technicians or licensed trade professionals during control board service or assembly. Power down and de-energize all equipment fully before handling or replacing any PCB mounting hardware. Use a correctly sized number 4 screw and do not overtighten, as nylon spacers can crack under excessive torque. Verify overall length and inside diameter against the original board specifications before installing replacement spacers.