Electro Hardware P593M09F16-440 Hex Standoff 4-40 1.5in Ss

Product Description

The ELECTRO HARDWARE P593M09F16-440 is a female hex circuit board standoff designed to create fixed spacing between a PCB and a mounting surface or between stacked boards. Machined from 18-8 and 303 grade stainless steel with an anodized bright finish, this standoff accepts a 4-40 threaded fastener in its female thread and measures 1.5 inches overall length with a 0.25 inch hex body width across flats. It meets the QQ-S-763 federal specification for stainless steel fasteners. Electronics technicians, enclosure builders, and panel fabricators install this hardware in control boards, relay panels, and equipment enclosures where corrosion resistance and precise board-to-surface spacing are required.

This standoff is suited for use in light commercial and residential control panel assemblies, HVAC circuit board mounting, electrical enclosures, and general electronics fabrication. Its hex body allows installation and removal with standard hex drivers or open-end wrenches without the fastener spinning. The 4-40 thread size is common in low-voltage control boards and instrumentation panels found across HVAC, electrical, and plumbing control applications.

Key Features

• Female 4-40 threaded hex standoff for precise PCB and panel spacing
• 1.5 inches overall length for consistent board-to-surface offset
• 0.25 inch width across flats allows wrench or hex driver installation
• 18-8 and 303 stainless steel construction for corrosion resistance
• Anodized bright finish meets QQ-S-763 federal fastener specification
• Hex body shape prevents rotation during fastener torquing

Compatibility

Designed as a standard 4-40 female hex standoff for use in circuit board mounting applications where a 1.5 inch standoff height and 0.25 inch hex body are specified.

Installation Notes

Installation is performed by electricians, electronics technicians, or panel fabricators. De-energize all circuits and discharge any capacitors before working on or near circuit boards. Use a properly sized open-end wrench or hex driver matched to the 0.25 inch across-flats dimension to seat the standoff without distorting the hex body. Follow applicable NEC guidelines for control panel and enclosure wiring when installing standoffs in electrical assemblies.