Electro Hardware P297M03F21440 Female Hex Standoff 4-40

Product Description

The ELECTRO HARDWARE P297M03F21440 is a female hex circuit board standoff designed to mount and space printed circuit boards within electronic enclosures and control panels. This standoff features a 4-40 internal thread and is fully threaded to a depth of 5/16 inches, providing secure board attachment across the full thread engagement length. The overall length is 5/16 inches, with a hex body measuring 3/16 inches across the flats for easy wrench engagement. Manufactured from brass with a zinc plating finish, it meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards for corrosion resistance and dimensional consistency. Electronics assemblers and electrical panel technicians are the typical installers.

This standoff is suited for residential and commercial electronic assemblies where PCB mounting requires precise standoff height and reliable thread engagement. Common applications include HVAC control boards, industrial control panels, automation enclosures, and general electronic equipment requiring board-level separation and support. The hex body shape allows installation with standard nutdrivers or hex wrenches, making it practical in tight board assemblies where space is limited.

Key Features

• 4-40 female thread with full 5/16 inch thread depth for secure fastener engagement
• Hex body shape at 3/16 inches across the flats for wrench or nutdriver installation
• Brass construction with zinc plating for corrosion resistance per ASTM B633 Type 1
• Meets QQ-B-626 Comp 22 fastener standard
• Compact 5/16 inch overall length suits low-profile PCB standoff applications

Compatibility

Designed as an OEM-style replacement or new-installation standoff for circuit boards using 4-40 threaded fasteners in standard hex standoff mounting configurations.

Installation Notes

Installation is performed by electronics technicians or electrical assemblers using a nutdriver or hex wrench sized to 3/16 inches across the flats. Power down all equipment and discharge any stored energy before working on circuit board assemblies. Do not overtighten, as brass threads can strip under excessive torque. Follow applicable electrical enclosure and assembly standards when mounting control boards in HVAC or industrial panel applications.