PCB Standoffs

Threaded spacers that hold a printed circuit board off its chassis, stack two boards at a fixed pitch, or carry a panel inside an enclosure. Every listing gives thread size, body length, across-flats dimension, thread configuration and material, with each figure in both millimetres and inches.

Choosing the material

Nylon 6/6 is non-conductive and non-magnetic, which is why it is the default wherever the standoff sits close to live traces. It absorbs moisture over time and softens above roughly 85 °C, so it is not a structural choice.

Brass conducts, so a brass standoff can double as a chassis ground path. It machines cleanly and holds an accurate thread at M2 and M2.5, where steel tends to tear.

304 stainless is what to use when the assembly is handled, vibrated or exposed. Stainless threads gall under speed or load — back the driver off and use an anti-seize compound on anything you expect to disassemble.

Male-female or female-female

A male-female standoff carries a stud at one end and an internal thread at the other, so a column of them stacks without extra hardware. Female-female takes a screw from both directions and is the safer default when you are not sure which way the assembly comes apart.

Metric or imperial

US boards run on both. M3 and #4-40 are close in diameter but are not interchangeable — the pitch differs and cross-threading destroys the internal thread. If you are matching an existing board, measure before you order; our metric to imperial conversion table covers the sizes that get confused most often.

Shop by thread size

Size pages carry the across-flats dimension, available lengths and the thread warning for that size: M2.5, M3, #4-40.