Hex Standoff
Standoffs & Spacers · spacer · threaded standoff · PCB standoff
Definition: A hex standoff is a hexagonal spacer with threaded ends that mounts and spaces circuit boards, panels, and components at a precise distance.
Anatomy & Schematic
■ Body■ Internal thread
Governing standards: Manufacturer specified (no universal standard)
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| 4-40 | M2.5 | 3/16 hex | 1/8–1 long |
| 6-32 | M3 | 1/4 hex | 1/4–2 long |
| 1/4-20 | M6 | 3/8 hex | 1/2–2 long |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Brass | brass | — | Electronics standard |
| Aluminum / nylon / stainless | varies | — | By application |
Materials
- Brass
- Aluminum
- Stainless steel
- Nylon
Pros & Cons
Pros
- Precise, repeatable spacing
- Male/female or female/female options
- Cheap in quantity
Cons
- Length must be chosen exactly
- Brass can strip in soft plastic bosses
- Small sizes are fiddly
Typical Uses
- PCB and electronics mounting
- Panel spacing
- 3D-printed assemblies
- Enclosure hardware
Alternatives & Related
- Machine Screw — Where you need a headed fastener, not a spacer
- Snap Ring — Groove retention instead of threaded spacing
Where to Buy
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FAQ
Male-female vs female-female standoff?
Male-female screws into a hole on one side and receives a screw on the other. Female-female receives screws on both sides. Pick the one that matches your mounting.
What is a standoff used for?
Mounting and spacing circuit boards and panels a fixed distance apart, and providing a strong threaded mounting point in electronics.