Electro Hardware MMF1317M0321M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1317M0321M25 is a male-female hex circuit board standoff designed for use in electronic assemblies where precise board-to-board or board-to-chassis spacing is required. Manufactured from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff provides reliable mechanical separation and thread engagement in a compact metric form factor. The overall length is 15.97 mm (approximately 0.629 inches), the body length is 12.00 mm (approximately 0.472 inches), and the hexagonal body measures 4.50 mm (approximately 0.177 inches) across flats. Electronics assemblers, PCB technicians, and field service technicians working on control boards in HVAC, electrical, and similar trade equipment install this fastener during board mounting and chassis assembly operations.

This standoff is suited for metric M2.5 x 0.45 thread applications in residential and commercial electronic control assemblies. Typical use cases include securing circuit boards at a fixed standoff height within enclosures, control panels, and equipment chassis where both a male threaded stud and a female threaded receiver are needed at opposite ends of the same fastener. The part is sold individually per package, with a minimum order quantity of 10 units.

Key Features

• Male-female hex configuration allows stacking or single-level board mounting in one fastener
• M2.5 x 0.45 metric thread on both ends for compatibility with standard metric hardware
• Brass construction with zinc-plated finish resists corrosion and provides electrical conductivity
• Meets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish standards
• Hexagonal body (4.50 mm across flats) allows installation and removal with standard hex tools
• Length tolerance of -0.150 to 0.150 mm for consistent board spacing in precision assemblies

Compatibility

Designed as a metric M2.5 x 0.45 male-female hex standoff for use in circuit board assemblies requiring brass construction and zinc-plated finish per ASTM B633 Type 1 and QQ-B-626 Comp 22 standards.

Installation Notes

Installation is performed by electronics assembly technicians or field service personnel. Power down and de-energize all equipment completely before removing or installing circuit board standoffs. Use an appropriately sized hex driver or nut driver matched to the 4.50 mm across-flats dimension to avoid rounding the hex body. Do not over-torque; brass fasteners at this size are susceptible to thread stripping if excess force is applied.