Electro Hardware S301M01F21C Round Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S301M01F21C is a round, female unthreaded circuit board spacer designed to maintain consistent standoff distance between a PCB and its mounting surface. Machined from brass to ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer receives a zinc-plated finish for corrosion resistance. It accepts a number 2 screw, measures 0.375 inches in overall length, 0.1875 inches in outside diameter, and 0.089 inches in inside diameter. Electricians, electronics technicians, and control board assemblers use this hardware when building or servicing low-voltage control assemblies, inverter boards, or industrial enclosures where precise board-to-chassis clearance is required.

This spacer is suited for residential and commercial applications wherever a number 2 fastener is used to secure a circuit board. Typical install scenarios include HVAC control board mounting, electrical enclosure PCB assemblies, and industrial panel builds. The small outside diameter of 0.1875 inches makes it appropriate for densely populated boards where clearance between components is limited. It ships and is sold individually, with a minimum order quantity of one piece.

Key Features

• Female unthreaded round body accepts a number 2 screw for straightforward board-to-chassis mounting
• Brass construction meets ASTM B633 and QQ-B-626 Comp 22 Type 1 fastener standards
• Zinc-plated finish provides corrosion resistance in control enclosure environments
• Overall length of 0.375 inches with tight length tolerance of -0.005 to 0.005 inches for consistent standoff height
• Inside diameter of 0.089 inches with tolerance of 0.000 to 0.010 inches for reliable screw fitment
• Compact 0.1875 inches outside diameter suits high-density PCB layouts

Compatibility

Designed as a standard inch-measurement circuit board spacer for use with number 2 screws in PCB mounting applications across residential and commercial control assemblies.

Installation Notes

Installation is performed by electronics technicians or electricians working on control board assemblies. De-energize and lock out the equipment before handling any PCB or its mounting hardware. Use appropriately sized hand tools and avoid overtightening into the female unthreaded body, as brass is softer than steel and may deform under excessive force. Follow applicable NEC guidelines when reassembling energized control panels or enclosures.