Thread Designations
ISO metric thread M
Unified National Coarse Thread Series ANSI B1.1 UNC
Unified National Fine Thread Series ANSI B1.1 UNF
British Standard Whitworth Coarse Thread Series BS 84 BSW
British Standard Whitworth Fine Thread Series BS 84 BSF
British Standard Pine Thread DIN ISO 228 G (BSP)
British Association Standard Thread BS 93 BA
British Standard Brass Thread BSB
British Standard Cycle Thread RS 811 BSC
American Taper Pipe Thread ANSI B1.20.1 NPT
Unified Thread Series 8 TPI ANSI B1.1 8 - UN

 

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