Electro Hardware S789-M07-F16-E Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S789-M07-F16-E is a round, female unthreaded circuit board spacer machined from 18-8 grade 303 stainless steel to meet fastener standard QQ-S-763. It measures 0.1875 inches overall length, with an outside diameter of 0.3125 inches and an inside diameter of 0.116 inches, sized for a number 4 screw. The uncoated finish keeps the surface clean for applications where corrosion resistance is provided entirely by the base alloy. Electricians, electronics technicians, and control board assemblers use this type of spacer to maintain precise standoff clearance between a circuit board and its mounting surface.

This spacer is suited for residential and light commercial control board assemblies, HVAC equipment control panels, and general electronics enclosures where a compact, low-profile standoff is required. The round body profile fits standard board-mounting hole patterns sized for a number 4 fastener. Its short 0.1875-inch length makes it appropriate for installations with tight vertical clearance between the board and the chassis or backplane.

Key Features

• 18-8 grade 303 stainless steel construction meets QQ-S-763 fastener standard
• Female unthreaded bore accepts number 4 screws
• Overall length of 0.1875 inches with a tight length tolerance of -0.005 to 0.005 inches
• Outside diameter of 0.3125 inches with inside diameter of 0.116 inches
• Inside diameter tolerance of 0.000 to 0.010 inches for consistent fit
• Uncoated finish relies on alloy corrosion resistance - no coating to crack or flake

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board assemblies using number 4 screw hardware in inch-system mounting configurations.

Installation Notes

Install this spacer with the power to the control board or panel fully de-energized before handling any board-mounted hardware. Use calibrated torque tools appropriate for number 4 fasteners to avoid cracking the board substrate. Follow applicable NEC guidelines when working inside electrical enclosures. Inspect the mounting hole diameter to confirm it falls within the spacer inside diameter tolerance range before installation.