Electro Hardware MMF1339M0916M25 Hex Standoff M2.5

Product Description

The ELECTRO HARDWARE MMF1339M0916M25 is a male-female hex circuit board standoff designed to create fixed spacing between PCB layers or between a board and a mounting surface. Machined from grade 303 stainless steel with a bright, uncoated finish, this standoff meets QQ-S-763 specification. The M2.5 x 0.45 thread runs male on one end and female on the other, with an overall length of 27.97 mm (approximately 1.10 inches) and a body length of 24.00 mm. The hexagonal body measures 4.5 mm across flats, allowing standard hex tooling for installation. Electronics assembly technicians and PCB integration specialists use this fastener in both production and field-service applications.

This standoff is suited for metric-threaded PCB mounting applications in commercial electronics, industrial control panels, HVAC control boards, and similar assemblies where stainless steel corrosion resistance is required. It is appropriate for use in environments where carbon steel hardware would be unsuitable. The M2.5 x 0.45 thread size is common in lightweight electronic assemblies and compact control modules.

Key Features

• Male-female hex configuration allows stackable PCB mounting with a single fastener type
• Grade 303 stainless steel construction meets QQ-S-763 fastener standard
• Overall length of 27.97 mm with a length tolerance of -0.150 to +0.150 mm
• 4.5 mm hex body width accepts standard metric hex drivers and wrenches
• Bright, uncoated finish maintains dimensional accuracy and avoids coating buildup on threads
• Thread length of 3.97 mm on the male end; thread depth of 4.80 mm on the female end

Compatibility

Designed for metric M2.5 x 0.45 threaded PCB and panel mounting applications. Confirm thread pitch and board clearance requirements before installation.

Installation Notes

Install using a metric hex driver or wrench sized for 4.5 mm across flats. Power down and de-energize any control board or panel completely before installing or removing standoffs. Do not overtighten - stainless steel fasteners at this size are susceptible to galling; apply appropriate anti-seize compound if repeated removal is expected. Minimum order quantity is 10 units.