Electro Hardware MP421M19F16M3 Female Hex Standoff M3

Product Description

The ELECTRO HARDWARE MP421M19F16M3 is a female hex circuit board standoff designed to create secure, measured spacing between PCBs and mounting surfaces or between stacked circuit boards. Manufactured from nylon with a plain, uncoated finish, this standoff features a fully threaded M3 x 0.5 female thread running the full 11 mm thread depth. The hexagonal body measures 4.5 mm across flats, allowing installation and removal with standard hex drivers or nut drivers. This fastener meets MIL-P-17091B requirements and is suited for electronics assembly, control board mounting, and low-voltage panel builds where non-conductive standoffs are required.

This standoff is used in residential and commercial electronics assembly applications where nylon construction is specified to prevent electrical conductivity between a circuit board and its mounting chassis. Typical installation scenarios include control board assemblies in HVAC equipment, industrial enclosures, and embedded electronics where the 11 mm overall length provides the required PCB clearance. Electricians, electronics technicians, and panel builders working on control systems and low-voltage wiring assemblies commonly install this type of fastener.

Key Features

• Fully threaded M3 x 0.5 female thread with 11 mm thread depth for secure PCB engagement
• Nylon construction provides electrical isolation between board and mounting surface
• Hexagonal body at 4.5 mm across flats allows standard tool installation and removal
• Plain, uncoated finish suitable for indoor electronics and control panel environments
• Meets MIL-P-17091B fastener standard
• Length tolerance of -0.13 mm to 0.13 mm ensures consistent board spacing

Compatibility

Designed as a standard M3 x 0.5 female hex nylon standoff for use in circuit board mounting applications requiring non-conductive, metric-threaded fasteners conforming to MIL-P-17091B.

Installation Notes

Installation is performed by electronics technicians or electricians working on control panel assemblies. Always de-energize the equipment before handling circuit boards or installing standoffs. Use a hex driver or nut driver sized for 4.5 mm across flats to avoid deforming the nylon hex body. Do not overtighten nylon standoffs, as the material is subject to thread stripping under excessive torque.