Electro Hardware MP1103M03F21M3 Female Hex Standoff M3

Product Description

The ELECTRO HARDWARE MP1103M03F21M3 is a female hex circuit board standoff designed to create fixed spacing between PCBs, enclosure panels, and mounting surfaces in electronics assemblies. Threaded M3 x 0.5 on the internal end, it accepts a standard M3 screw for secure board attachment. The hex body measures 6 millimeters across flats, allowing wrench tightening for consistent torque without slippage. Overall length is 52 millimeters with a thread depth of 6.4 millimeters. Constructed from brass with a zinc electroplate finish conforming to ASTM B633 Type 1 and QQ-B-626 Comp 22, this standoff resists corrosion and provides reliable electrical grounding continuity in service environments.

This standoff is used in electronics manufacturing, control panel assembly, and field service applications where PCBs must be mounted at a fixed standoff height. It is appropriate for residential and light commercial HVAC control boards, electrical enclosures, and industrial automation panels. Electricians, HVAC controls technicians, and electronics assembly professionals install this hardware when replacing damaged standoffs or building new panel assemblies. The metric M3 thread size makes it suitable for metric-fastened PCB platforms common in imported control equipment.

Key Features

• Female M3 x 0.5 internal thread accepts standard M3 screws for secure PCB mounting
• 52 millimeter overall length provides generous board-to-surface clearance for component clearance
• Hex body at 6 millimeters across flats allows wrench installation for consistent seating
• 6.4 millimeter thread depth gives full thread engagement with standard M3 fasteners
• Brass construction with zinc electroplate finish meets ASTM B633 Type 1 and QQ-B-626 Comp 22 corrosion resistance standards
• Partially threaded design limits thread engagement depth, preventing over-insertion damage to mating boards

Compatibility

Designed as a metric-threaded PCB standoff for use in any assembly requiring M3 x 0.5 female thread hardware with a 52 millimeter overall length and hex body profile.

Installation Notes

Installation is performed by electricians or electronics technicians during panel assembly or PCB replacement service. De-energize all circuits and discharge any capacitors in the board assembly before removing or installing standoffs. Use a 6 millimeter wrench or nut driver to seat the hex body flush against the mounting surface without over-torquing, which can crack PCB material. Follow applicable NEC or equipment manufacturer guidelines for control board mounting hardware.