ASME Thread Standards

Browse all thread profiles defined by the American Society of Mechanical Engineers. Select a profile below to view all available thread sizes.

ASME Unified National Coarse (UNC)

Standard: ASME B1.1

33 sizesView all

ASME Unified National Fine (UNF)

Standard: ASME B1.1

34 sizesView all

ASME Unified National Extra Fine (UNEF)

Standard: ASME B1.1

25 sizesView all

ASME Unified National Constant Pitch (UN)

Standard: ASME B1.1

65 sizesView all