Electro Hardware MMF1341M0321M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1341M0321M25 is a male-female hex circuit board standoff designed to create precise, rigid spacing between stacked PCBs or between a circuit board and a mounting surface. Manufactured from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff offers reliable corrosion resistance and electrical conductivity in tight board-level assemblies. The metric M2.5 x 0.45 thread size and hexagonal body allow secure hand or tool tightening without marring the fastener faces. Overall length is 28.97 mm (approximately 1.14 inches), with a 25.00 mm (approximately 0.98 inches) body length and a hex width across flats of 4.50 mm (approximately 0.18 inches).

This standoff is used in electronics assembly, control panel fabrication, and equipment enclosure builds where metric fastening is required. Common applications include industrial control boards, HVAC and building automation PCB assemblies, power supply mounting, and any application where a board must be elevated and secured to a chassis or secondary board with a male thread on one end and a female thread on the other. The metric sizing suits European-standard and metric-native equipment platforms.

Key Features

• Male-female hex configuration allows stacking of multiple boards or secure chassis mounting in a single fastener
• M2.5 x 0.45 metric thread on both ends for consistent thread engagement with standard metric hardware
• Brass construction with zinc-plated finish meets ASTM B633 Type 1 and QQ-B-626 Comp 22 for corrosion resistance
• Hexagonal body (4.50 mm width across flats) accepts standard hex drivers for controlled installation torque
• Overall length of 28.97 mm with a length tolerance of -0.150 to +0.150 mm for consistent stack height
• Thread depth of 4.80 mm and thread length of 3.97 mm provide adequate engagement for secure board retention

Compatibility

Designed as a metric M2.5 x 0.45 male-female hex standoff for use with any PCB, chassis, or enclosure that accepts M2.5 metric thread hardware.

Installation Notes

Installation is typically performed by electronics assemblers or control panel technicians. Always power down and de-energize the equipment before installing or removing standoffs from a live circuit board assembly. Use a properly sized hex driver or nut driver matching the 4.50 mm width across flats to avoid rounding the hex body. Follow applicable IPC assembly standards and equipment manufacturer torque guidelines when securing boards to prevent PCB stress or cracking.