Electro Hardware S1391-M04-F16-I Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1391-M04-F16-I is a round, female unthreaded aluminum circuit board spacer designed to maintain precise clearance between a PCB and a mounting surface. Built from aluminum grade T-3 and conforming to fastener standard QQ-A-225A Comp 2, this spacer provides a lightweight, corrosion-resistant standoff in electronics assemblies. It accepts a number 10 screw, measures 1 inch in overall length, carries a 0.194 inch inside diameter, and has a 0.500 inch outside diameter. The uncoated finish is suitable where bare aluminum is acceptable and no additional coating is required.

This spacer is used in circuit board mounting applications across a range of industries including HVAC controls, electrical panels, and industrial electronics. It is installed by electronics technicians, electricians, and controls specialists who need a reliable standoff to keep a PCB elevated from a chassis or sub-panel. The female unthreaded body accepts a male fastener from below, allowing the board to be secured without threading directly into the PCB itself.

Key Features

• Female unthreaded design accepts a number 10 screw for secure PCB mounting
• Aluminum grade T-3 construction per fastener standard QQ-A-225A Comp 2
• 1 inch overall length with a tight length tolerance of -0.005 to 0.005 inches
• 0.194 inch inside diameter with an inside diameter tolerance of 0.000 to 0.010 inches
• 0.500 inch outside diameter in a round body profile
• Uncoated finish - no additional surface treatment applied

Compatibility

Designed as an OEM-style replacement or new-install spacer for circuit board mounting applications requiring a number 10 screw, a 0.500 inch OD round body, and a 1 inch standoff height in aluminum construction.

Installation Notes

Installation is performed by electronics technicians or electricians working on control boards and panel assemblies. Power down and de-energize all circuits before handling or replacing any PCB hardware. Use the correct number 10 fastener torqued to the board manufacturer specifications to avoid cracking the PCB substrate. Verify spacer seating is flush against the mounting surface before securing the board.