UL 94: flammability of plastic materials

UL 94 provides small-scale tests that classify the burning behaviour of plastic materials, e.g. HB, V-0, V-1, V-2, 5VA, 5VB. Ratings are tied to thickness and colour.

What it covers

Choosing tests

Specify target rating and thickness; component recognition differs from a one-off lab test.

Plain-language scope summaries — no standard text is reproduced. Revision and status are not asserted here; confirm the current version with the standards owner (DLA ASSIST for MIL documents) and your contract.