Abstract: A plunger stand-off assembly for securing a circuit board to a computer chassis without the need for tools. The plunger stand-off assembly includes an inner component, an outer component, and a spring for causing relative movement between the inner and outer components. The relative movement between the inner and outer components securely fastens the circuit board to the computer chassis.

Abstract: A clamp assembly for removably attaching a drive bay support to a main computer chassis. The clamp assembly includes a clamp support having a hook portion and at least one clamp link for pivotally attaching the clamp support to the drive bay support. The clamp asssembly is in a clamped position when the clamp assembly is pivoted about the drive bay support such that the hook portion of the clamp support engages a hook portion of the main chassis. The clamp assembly is in an unclamped position when the clamp assembly is pivoted about the drive bay support such that the hook portion of the clamp support does not engage the main chassis.

Abstract: A back plane lock down for fastening one or more circuit boards and/or cover plates to the back plane of a computer chassis. The back plane lock down is made of non-electrically conducting material such that the computer need not be powered down when fastening the circuit boards and/or cover plates to the back plane. The back plane lock down includes one or more sections that can be pivotally connected together by using a bracket for accommodating a wide variety of back plane configurations. Each section includes one or more tabs disposed within openings formed by ribs. Each tab includes a downwardly extending projection for insertion into an opening in the back plane to easily fasten each circuit board and cover plate to the back plane without the need for tools.