Electro Hardware S1335-M10-F21-I Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S1335-M10-F21-I is a round, female unthreaded circuit board spacer manufactured from Grade 2 steel with a zinc-plated finish. It is designed for use with No. 10 screws and provides 0.125 inches of standoff between a printed circuit board and a mounting surface. The inside diameter measures 0.194 inches and the outside diameter measures 0.500 inches. The zinc plating meets ASTM B633 and QQ-S-633 Type 1 standards, providing corrosion resistance in light-duty electronic and electrical enclosure applications. Licensed electricians, electronics technicians, and panel builders install this type of hardware during board mounting and enclosure assembly work.

This spacer is suited for residential and commercial electrical panels, control boards, and enclosures where a No. 10 screw pattern is used to mount circuit boards at a fixed standoff height. Its compact 0.125-inch overall length makes it appropriate for tight-clearance installations where minimal board-to-surface separation is required. The female unthreaded design accepts a screw passed through the board and spacer into a threaded receiving point below, keeping the board secure and isolated from the mounting surface.

Key Features

• Female unthreaded round body accepts No. 10 screws for straightforward board mounting
• Grade 2 steel construction with zinc-plated finish meets ASTM B633 and QQ-S-633 Type 1
• Overall length of 0.125 inches provides low-profile standoff clearance
• Inside diameter of 0.194 inches with a tolerance of 0.000 to 0.010 inches for consistent screw fit
• Outside diameter of 0.500 inches provides a stable contact footprint on the mounting surface
• Length tolerance of -0.005 to 0.005 inches for repeatable stacking height

Compatibility

Designed as an OEM-style replacement or new-installation hardware component for circuit board mounting applications requiring a No. 10 screw size in inch-measurement fastener systems.

Installation Notes

Installation is performed by electricians or electronics technicians during panel assembly or control board replacement. Power down and de-energize the enclosure or control system fully before handling any circuit boards or mounting hardware. Standard hand tools are sufficient for installation. Follow applicable NEC guidelines when working inside electrical enclosures.