REF:

M ISO metric thread for DIN 13 normal pitch

M-LH Left hand thread metric ISO normal pitch DIN 13

MF Metric thread ISO fine pitch DIN 13

UNC Unified thread, normal pitch ASME B1.1

UNF Unified thread, fine pitch ASME B1.1

UN-8 Unified thread for special diameters and pitches ASME B1.1

G (BSP) Whitworth thread for pipe DIN EN ISO 228

G-LH Whitworth left thread for tube DIN EN ISO 228

Rp (BSPP) Whitworth cylindrical thread for pipe DIN EN 10226-1 (DIN 2999)

Rc (BSPT) Whitworth Tapered Thread for Pipe DIN EN 10226-2 (ISO 7-1)

NPSM American Cylindrical Pipe Thread ANSI B1.20.1

NPT American tapered pipe thread (with gasket) ANSI B1.20.1

NPTF American tapered pipe thread (without gasket) ANSI B1.20.3