Electro Hardware S1143-M04-F16-J Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1143-M04-F16-J is a round, female unthreaded aluminum circuit board spacer designed to maintain precise standoff distance between a printed circuit board and a mounting surface. Built to accept a No. 12 screw, this spacer measures 1.5 inches overall length with a 0.219-inch inside diameter and a 0.375-inch outside diameter. Manufactured from Aluminum Grade T-3 per fastener standard QQ-A-225A Comp 2, it ships uncoated and ready for installation. Electronics assemblers, electrical technicians, and panel builders use this type of spacer to secure and isolate circuit boards in control panels, enclosures, and electronic assemblies.

This spacer is suited for use in residential and commercial electrical assemblies, HVAC control boards, industrial control enclosures, and general electronics mounting applications where a round, unthreaded female standoff is required. Its uncoated aluminum construction keeps weight low while providing adequate rigidity for board support. The inch-system dimensions and No. 12 screw compatibility make it a straightforward fit for standard North American panel and board layouts.

Key Features

• Female unthreaded design accepts a No. 12 screw for secure board mounting
• 1.5-inch overall length provides consistent standoff clearance between board and surface
• 0.219-inch inside diameter with a tolerance of 0.000 to 0.010 inches for precise fit
• 0.375-inch outside diameter in a round body profile for uniform load distribution
• Aluminum Grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• Uncoated finish suitable for use as-is or with customer-applied surface treatment

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications requiring a No. 12 screw, inch-system dimensions, and a female unthreaded round aluminum standoff.

Installation Notes

Installation is typically performed by electronics assemblers or qualified electrical technicians. De-energize and discharge all circuits before handling or mounting circuit boards. Insert the spacer between the board and the mounting panel, aligning the inside diameter with the screw clearance hole before seating the No. 12 fastener. Avoid overtightening, which can crack the board or deform the spacer.