Electro Hardware S289M01F21C Circuit Board Spacer Brass

Product Description

The ELECTRO HARDWARE S289M01F21C is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a printed circuit board and a mounting surface. Manufactured from brass and finished with zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1, it delivers corrosion resistance suited to enclosed electronic assemblies. The spacer measures 3/16 inches overall length with a 3/16 inches outside diameter and a 0.089 inches inside diameter. It accepts a number 2 screw and is measured and rated in the inch system. Electronics assemblers and field technicians install this spacer during board mounting, rework, or replacement procedures.

This spacer is used in residential and commercial electronic control assemblies where consistent board standoff height is required. Typical applications include HVAC control board installations, panel assemblies, and general PCB mounting scenarios where a number 2 fastener is used. The zinc-plated brass construction makes it suitable for indoor enclosures that may see minor humidity exposure. It ships in single-piece quantity, making it appropriate for targeted service work or small-lot board repair.

Key Features

• Female unthreaded round body accepts a number 2 screw for straightforward installation
• Brass base material with zinc plating per ASTM B633 and QQ-B-626 Comp 22 Type 1 for corrosion resistance
• Tight length tolerance of -0.005 to 0.005 inches ensures consistent board standoff height
• Inside diameter tolerance of 0.000 to 0.010 inches accommodates standard number 2 fastener shanks
• Compact 3/16 inches OAL and 3/16 inches OD fits tight PCB layouts
• Inch-system dimensions align with standard North American board fabrication specs

Compatibility

Designed as an OEM-style replacement or service spacer for circuit board assemblies requiring a female unthreaded round standoff sized for a number 2 screw with 3/16 inches overall length and 3/16 inches outside diameter.

Installation Notes

This spacer is installed by electronics technicians or field service personnel performing circuit board mounting or replacement. Always de-energize the equipment and discharge any stored voltage before accessing control boards. Use appropriately sized number 2 fasteners and do not overtighten, as brass spacers can deform under excessive torque. Follow all applicable equipment manufacturer instructions and local codes when servicing electronic control assemblies.