Electro Hardware MMF1301M0916M25 Hex Board Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1301M0916M25 is a male-female hex circuit board standoff designed to create fixed spacing between printed circuit boards or between a board and a mounting surface. Manufactured from 303 stainless steel with a bright, uncoated finish, this standoff meets QQ-S-763 fastener standards. The metric M2.5 x 0.45 thread runs male on one end and female on the other, allowing boards to be stacked or mounted securely in a single pass. Overall length is 8.97 mm, body length is 5.00 mm, and the hex body measures 4.50 mm across flats. This hardware is installed by electronics technicians, PCB assembly professionals, and field service engineers performing board-level repairs.

This standoff is suited for use in control board assemblies, enclosure-mounted PCBs, and equipment requiring precise board-to-board or board-to-chassis spacing. The metric M2.5 x 0.45 thread size is common in compact electronics and instrumentation panels. Applications include HVAC control board assemblies, industrial control panels, and any installation where a rigid, corrosion-resistant spacer is required between circuit board layers. The hex body allows installation and removal with standard hex drivers or open-end wrenches without marring adjacent surfaces.

Key Features

• Male-female hex configuration supports board stacking and chassis mounting in a single fastener
• 303 stainless steel construction meets QQ-S-763 standards for corrosion resistance and durability
• M2.5 x 0.45 metric thread on both ends with a 3.97 mm male thread length and 4.80 mm female thread depth
• 4.50 mm hex body width across flats accepts standard metric hex tooling
• Bright, uncoated finish - no coating to add dimensional variance or affect conductivity
• Length tolerance of -0.150 to 0.150 mm for consistent board spacing in tight assemblies

Compatibility

Designed as an OEM-style metric standoff for circuit board assemblies requiring M2.5 x 0.45 thread fasteners with a hex body profile.

Installation Notes

Power down and de-energize all circuits before installing or removing circuit board hardware. Use an appropriate metric hex driver or open-end wrench sized for 4.50 mm across flats to avoid rounding the hex body. Do not over-torque - finger-tight plus a snug quarter-turn with tooling is typical for M2.5 standoffs in PCB applications. Follow applicable manufacturer assembly procedures and relevant electrical safety codes when working inside control enclosures.