Electro Hardware S1055-M01-F21-I Circuit Board Spacer Brass

Product Description

The ELECTRO HARDWARE S1055-M01-F21-I is a round, female unthreaded circuit board spacer designed to maintain precise standoff distance between a PCB and its mounting surface. Built from brass and finished with zinc plating per ASTM B633, QQ-B-626 Comp 22 Type 1, this spacer provides corrosion resistance and dimensional stability in electronic assemblies. It accepts a No. 10 screw, measures 0.125 inches overall length, and carries an outside diameter of 0.375 inches with an inside diameter of 0.194 inches. Electronic assembly technicians and industrial maintenance professionals use it wherever controlled board standoff height and secure mechanical support are required.

This spacer fits standard PCB mounting applications in residential and commercial electronics, control panels, and industrial equipment enclosures. The female unthreaded body allows a No. 10 fastener to pass through while the spacer maintains the specified gap between the circuit board and chassis. Its compact 0.125-inch length suits low-profile assemblies where minimal standoff height is critical. The brass construction supports soldering and conductive grounding paths when required by the assembly design.

Key Features

• Female unthreaded round body accepts No. 10 screws for straightforward PCB mounting
• Brass construction with zinc-plated finish meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards
• 0.125-inch overall length with tight length tolerance of -0.005 to 0.005 inches for consistent standoff height
• Inside diameter of 0.194 inches with tolerance of 0.000 to 0.010 inches for reliable fastener fit
• Outside diameter of 0.375 inches provides stable bearing surface against the PCB or chassis
• Inch-system dimensions suit standard North American PCB hardware and panel layouts

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board assemblies requiring a No. 10 screw, female unthreaded, round brass standoff with a 0.125-inch overall length and 0.375-inch outside diameter.

Installation Notes

Installation is performed by electronics assembly technicians or qualified maintenance personnel. De-energize and fully discharge the circuit board assembly before handling any PCB hardware. Use the appropriate No. 10 fastener and a calibrated torque driver to avoid deforming the unthreaded brass body. Follow applicable assembly drawings and IPC standards for PCB standoff installation procedures.