Electro Hardware S841-MO4-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S841-MO4-F16-E is a round, female unthreaded circuit board spacer machined from aluminum alloy grade T-3 to fastener standard QQ-A-225A Comp 2. It measures 1 inch overall length with a 0.116 inch inside diameter and a 5/16 inch (0.3125 inch) outside diameter. The uncoated finish leaves the aluminum bare for applications where coating is unnecessary or undesirable. Designed for use with number 4 screw hardware, this spacer provides a precise standoff between a printed circuit board and a mounting surface. It is installed by electronics technicians, field service engineers, and equipment assemblers working on control boards in HVAC, industrial, and electrical enclosure applications.

This spacer is suited for use in printed circuit board assemblies requiring a fixed standoff distance of 1 inch. Typical install scenarios include panel-mounted control boards, relay boards, and other electronics inside HVAC units, electrical enclosures, and light industrial equipment. The female unthreaded bore accepts a number 4 fastener, making it compatible with standard number 4 screw assemblies used across a wide range of commercial and residential control board configurations.

Key Features

• Aluminum grade T-3 construction per fastener standard QQ-A-225A Comp 2
• Female unthreaded bore sized for number 4 screw hardware
• 1 inch overall length provides consistent standoff height
• 0.116 inch inside diameter with a tolerance of 0.000 to 0.010 inches
• 5/16 inch outside diameter with round body shape for uniform seating
• Uncoated finish - no additional coating to affect fit or conductivity

Compatibility

Designed as an OEM-style replacement or stock spacer for printed circuit board assemblies using number 4 screw fasteners requiring a 1 inch standoff height.

Installation Notes

Installation is performed by electronics technicians or qualified service personnel. Always de-energize and discharge the circuit board assembly before handling or replacing spacers on live control boards. Use a number 4 fastener of appropriate length to pass through the 0.116 inch bore without cross-threading. Inspect the mounting surface for debris or burrs before seating the spacer to ensure consistent standoff height and board alignment.