Electro Hardware S333M10F21C Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S333M10F21C is a round, female unthreaded circuit board spacer designed for 2-screw, number 2 thread-size applications in electronics assembly and PCB mounting. It measures 0.875 inches overall length, with an outside diameter of 0.1875 inches and an inside diameter of 0.089 inches. Constructed from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, this spacer provides corrosion resistance and dimensional consistency in tight PCB layouts. Electricians, electronics technicians, and board-level assembly professionals use this spacer to maintain proper standoff clearance between circuit boards and mounting surfaces.

This spacer is suited for residential and commercial electronic control board installations, including HVAC control boards, industrial PCB assemblies, and general-purpose electrical panel applications. Its compact 3/16-inch outside diameter makes it appropriate for densely populated board layouts where clearance between components and mounting hardware is critical. The female unthreaded design accepts a number 2 screw from both ends, allowing secure board-to-chassis or board-to-board standoff configurations.

Key Features

• Female unthreaded body accepts number 2 screws for secure two-point fastening
• 0.875 inch overall length with a tight length tolerance of -0.005 to 0.005 inches
• 0.1875 inch outside diameter and 0.089 inch inside diameter with inside diameter tolerance of 0.000 to 0.010 inches
• Grade 2 steel construction with zinc-plated finish per ASTM B633 and QQ-S-633 Type 1
• Round body shape for consistent contact and even load distribution on PCB surfaces

Compatibility

Designed as an OEM-style replacement or new-installation spacer for circuit board mounting applications requiring a number 2 screw size, round body, and 0.875 inch standoff length.

Installation Notes

Installation is performed by electronics technicians or licensed electricians during control board assembly or replacement. De-energize all circuits and discharge any capacitors before handling circuit boards or installing fasteners. Use a properly sized number 2 screwdriver or nut driver to avoid stripping the mating hardware. Follow applicable NEC guidelines and equipment manufacturer torque recommendations when securing board assemblies.