Mil-Grade Rackmount Computer withstands shock and vibration.

Press Release Summary:

Featuring .090 in. 5052-H32 aluminum chassis and .250 in. milled solid aluminum front panel, M2U-20A COTS Plus Computer is suited for rugged military and industrial applications. Unit accommodates ATX motherboard and includes 3 I/O card slots, four 2 ½ in. removable drive bays with shock mounts, slim line DVD and floppy with 2 front panel USB ports, and three 80 x 38 mm cooling fans. Single or dual redundant power supplies are available with options for AC, DC, and Mil-Std 704/1275.

Original Press Release:

Chassis Plans Debuts M2U-20A 2U Mil Grade COTS Plus Rackmount Computer System

San Diego, Calif. - Chassis Plans, The Original Industrial Computer Source®, releases the M2U-20A rugged COTS Plus rackmount computer system. The M2U-20A is designed specifically for high shock and vibration environments found in military applications and includes unique features to assure survival in the harshest environments.

The M2U-20A is intended for rugged military and industrial applications where a short depth, light weight and incredibly sturdy rackmount system is required. The system is optimized for installation in transit cases or for mobile installations such as aircraft or vehicular. The M2U-20A is designed to meet 901D in a shock isolated rack and Mil-Std-810G for survival in high-G applications.

"The M2U family is an outgrowth of our highly successful M4U series of military systems. Customers liked the features and wanted similar capabilities in a shorter 2U system." said Tony Bowers, FAE at Chassis Plans. "We had quantity orders in place for a couple of defense projects in advance of fabricating metal based on our reputation, the system specs, and the 3D drawings we provided the customers for approval."

System features include:

  • 5052-H32 high strength aluminum construction

  • Milled solid .250-inch aluminum front panel

  • Accommodates ATX motherboard

  • Three I/O card slots

  • Card hold down system tailored to installed add-in cards

  • Four 2-1/2 inch removable drive bays - all shock isolated

  • Slim line DVD and floppy w/ two front panel USB ports

  • All self locking stainless steel hardware

  • Full width formed and welded front door with air filter

  • EMI / Environmental gasket to seal front door

  • Ample self locking screws in lid to create solid box structure for torsional strength

  • Three high speed 80x38mm cooling fans w/ full width front panel air filter

  • Multiple mounting points for motherboard and processor heat sinks

  • Single or dual redundant power supplies, options for AC, DC, and Mil-Std 704 / 1275

  • Designed for transit case portable applications and to be flight qualified

  • Designed to meet Mil-Stds 901D, 810G, 167

  • Long life components and revision controlled build for long program availability

  • Customer defined features to enhance mission applicability

    Four front accessible 2-1/2 inch drive bays offer a wide variety of options including hot swap drive carriers. Shock mounts are provided on the drives. Systems are available with rotating media hard drives for large storage requirements or Solid State Drives (SSDs) for ultra rugged configurations.

    The system accepts ATX motherboards and provides for three plug-in cards. A unique feature is access to the cards is through a side panel allowing quick insertion and removal of each card without disturbing the other cards. A tailored card hold down system provides optimum support and retention of the plug in cards to assure they stay seated in high-G / high-vibration environments. A variety of 3-slot riser cards provides any desired mix of slot types.

    Chassis construction is of high strength .090-inch 5052-H32 aluminum with a chem film per Mil-C-5541E. The front panel is milled from a solid piece of .250-inch aluminum and is finished in black powder coat. The lid is secured with a large number of self locking screws to create a rigid box structure. Alternative finishes and customer specified logo are available.

    The M2U-20A is designed to be flight qualified and to meet all appropriate Mil Standards for shock, vibration, and environmental specifications.

    Chassis Plans offers a wide variety of integrated systems configured exactly to customer requirements. Long life and road map components are used throughout for assured long term program availability. Attention to detail from component selection through wire harness routing and securing to "Build Books" integration instruction sets provide our customers consistent and reliable systems shipment to shipment and program to program. The M2U-20A was designed and is manufactured in the US for high quality and assured long program availability.

    The M2U-20A is currently shipping in production quantities. For pricing and availability, contact Chassis Plans at 858-571-4330 or email Additional details are available at

    About Chassis Plans

    Chassis Plans is a recognized leader in manufacturing fully configured turn-key military grade rackmount computer solutions for the industrial, rugged, and military markets. They manufacture 1U to 6U ATX and Single Board Computer systems tailored exactly to customer application requirements. They also manufacture a full line of military grade rack mount and panel mount LCD monitors and keyboard drawers.

    Chassis Plans specializes in long-life product support offering unmatched in-house custom chassis and system design, long-life industrial motherboards and SBC's with strict revision control and material obsolescence management for trouble free program deployment. Key military customers include companies such as L3, Lockheed, and Northrop Grumman. Notable commercial customers include Siemens, Nikon, & General Electric. Chassis Plans' Systems are Engineered to Perform!® Please visit for more information or e-mail at

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