ANSI Screw Thread Designations and Symbols P - Z

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Fastener and Screw / Bolt Design, Formula and Calculations

Screw Thread Designations and Symbols P - Z

The following chart contains industry standard designations for Screw thread types.

PTF Dryseal SAE Short Taper pipe thread
SGT Special Gas Taper thread form
SPL-PTF Dryseal Short Taper Pipe thread
STI Special Threads for Helical Coil Wire Screw Thread Inserts
UN Unified and American thread series
UNC Unified and American Coarse thread series
UNEF Unified and American Extra-Fine thread series
UNF Unified and American Fine thread series
UNIV Unified Miniature Thread Series
UNJ Unified Thread Series with Controlled Root Radius
UNJC Unified Coarse Thread Series with Controlled Root Radius
UNJF Unified Fine Thread Series with Controlled Root Radius
UNR Unified Constant Pitch thread series with Controlled Root Radius
UNRC Unified Coarse Thread Series with Controlled Root Radius
UNRF Unified Fine Thread Series with Controlled Root Radius
UNS Unified and American threads of selected special diameters and pitches

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