Electro Hardware S1351-M04-F16-I Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1351-M04-F16-I is a round, female unthreaded circuit board spacer machined from aluminum grade T-3 to QQ-A-225A Comp 2 fastener standard. It accepts a No. 10 screw and measures 0.375 inches overall length with a 0.500 inch outside diameter and a 0.194 inch inside diameter. The spacer is supplied uncoated and maintains tight dimensional tolerances, with an inside diameter tolerance of 0.000 to 0.010 inches and a length tolerance of -0.005 to 0.005 inches. Electricians, electronics technicians, and control board assembly professionals use this type of spacer to maintain consistent standoff clearance between a PCB and its mounting surface.

This spacer is suited for residential and commercial electronic control board assemblies, HVAC control panels, electrical enclosures, and similar applications where a No. 10 fastener is used to mount a circuit board at a fixed standoff height of 3/8 inch. The aluminum construction keeps weight low while providing adequate structural support for board-mounting applications in both field-service and factory-assembly contexts. Its uncoated finish is appropriate for standard indoor electronic environments where corrosion resistance is not a primary concern.

Key Features

• Female unthreaded body accepts a No. 10 screw for secure board mounting
• Overall length of 0.375 inches provides a consistent 3/8 inch standoff clearance
• 0.500 inch outside diameter and 0.194 inch inside diameter with tight tolerances
• Aluminum grade T-3 construction per QQ-A-225A Comp 2 fastener standard
• Round body shape for uniform fit in standard PCB mounting holes
• Uncoated finish - no added material to affect dimensional stack-up

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications using No. 10 screw fasteners requiring a 3/8 inch standoff height.

Installation Notes

Installation is performed by electricians or electronics technicians during control board service or panel assembly. Power down and de-energize all circuits before removing or installing circuit board hardware. Use appropriately sized No. 10 fasteners and avoid overtightening, which can crack the PCB or deform the spacer. Follow applicable NEC guidelines and equipment manufacturer instructions for control board mounting clearances.