Electro Hardware S509-M04-F16-G Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S509-M04-F16-G is a round, female unthreaded aluminum circuit board spacer designed to maintain precise separation between PCBs and mounting surfaces in electronic assemblies. It accepts a number 6 screw and measures 0.1875 inches in overall length, with an outside diameter of 0.25 inches and an inside diameter of 0.141 inches. Machined from Aluminum Grade T3 to the QQ-A-225A Comp 2 fastener standard, this spacer is supplied in an uncoated, bright finish. Electronics technicians and assembly professionals install these spacers to provide reliable standoff height and prevent contact between circuit boards and chassis surfaces.

This spacer is suited for use in control board assemblies, instrument panels, and general PCB mounting applications found in HVAC control systems, electrical enclosures, and other equipment requiring precise board standoff. The compact dimensions and lightweight aluminum construction make it appropriate for both original equipment assembly and field repair work where consistent board clearance and number 6 screw compatibility are required.

Key Features

• Female unthreaded round body accepts number 6 screw fasteners
• Overall length of 0.1875 inches with a length tolerance of -0.005 to 0.005 inches
• Outside diameter of 0.25 inches and inside diameter of 0.141 inches with an ID tolerance of 0.000 to 0.010 inches
• Aluminum Grade T3 construction meets QQ-A-225A Comp 2 fastener standard
• Bright uncoated finish; no additional coating to affect dimensional stack-up
• Lightweight at 0.001 pounds per unit; minimal weight impact on board assemblies

Compatibility

Designed as an OEM-style circuit board spacer for applications requiring a number 6 screw, female unthreaded round spacer with a 0.25-inch outside diameter and 0.1875-inch overall length in inch-measurement systems.

Installation Notes

These spacers are installed by electronics technicians and assembly professionals during PCB mounting. Power down and de-energize all circuits before servicing any control board assembly. Verify screw size and standoff height requirements against the board layout specification before installation. Avoid over-torquing fasteners, as the unthreaded female body is not designed to resist rotational force from the spacer body itself.