How to find the right Standoffs AI guide

Written by an AI model from its trained knowledge.

What the AI looks for in Standoffs

Thread standard and size: Use M2.5 for Raspberry Pi mounting holes and M3 for most metric PCBs and 3D printers. ATX motherboard standoffs are typically #6-32 into the case, and #4-40 appears in older US electronics. A wrong thread will cross-thread or fail to engage.
Gender configuration: Female-female needs screws on both ends. Male-female threads into a tapped hole or stacks onto another standoff. Male-male joins two tapped parts. The configuration determines whether you need extra screws and whether standoffs can be stacked.
Body length: Measure shoulder to shoulder, excluding the male stud. Leave clearance for the tallest component or connector underneath. Body length alone sets the gap between boards or between a board and the chassis.
Material and grounding: Use nickel-plated brass or stainless where the mounting hole is a ground pad. Use nylon where the hole is near traces or must be isolated. A metal standoff bonds to the chassis, which is either needed for grounding or causes a short.
Hex vs round body: Choose hex when you need to hold the standoff with a wrench or nut driver while torquing. Round standoffs spin when you tighten the screws.
Mounting style: Use threaded standoffs for tapped or through holes, self-clinching standoffs for sheet metal you can press, and snap-in nylon supports for tool-free PCB mounting. Each style needs a different hole preparation.

Keystone Electronics: Wide range of hex and round standoffs in multiple genders and materials.
Würth Elektronik: Metric PCB standoffs with clear dimension data.
Harwin: PCB standoffs, including surface-mount solderable types.
PennEngineering (PEM): Self-clinching standoffs for sheet-metal enclosures.
RAF Electronic Hardware: Inch and metric threaded standoffs.
Essentra Components: Nylon standoffs and snap-in PCB supports.

Assortment kits that do not state thread size and whether lengths include the male stud.
Nylon standoffs on boards that are frequently plugged and unplugged or that heat up.
Metal standoffs on mounting holes with no keep-out ring from nearby traces.

Not reliably. Raspberry Pi mounting holes are sized for M2.5, so use M2.5 standoffs.