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Threads
Metric Coarse Threads
ISO metric threads with the standard coarse pitch series.
Metric Fine Threads
ISO metric threads with finer pitches for each nominal diameter.
Metric Extra Fine Threads
Metric fine-pitch thread combinations for compact or thin-wall parts.
UNC and UNRC
Unified National Coarse Threads
UNF
Unified National Fine Threads
UNEF
Unified National Extra Fine Threads
ASME-B1.1
Unified UN, UNR and UNJ thread forms and basic dimensions.
4UN and 4UNR
Unified constant-pitch series at 4 threads per inch.
6UN and 6UNR
Unified constant-pitch series at 6 threads per inch.
8UN and 8UNR
Unified constant-pitch series at 8 threads per inch.
12 UN and 12UNR
Unified constant-pitch series at 12 threads per inch.
16 UN and 16 UNR
Unified constant-pitch series at 16 threads per inch.
20 UN and 20 UNR
Unified constant-pitch series at 20 threads per inch.
28 UN and 28 UNR
Unified constant-pitch series at 28 threads per inch.
32 UN and 32 UNR
Unified constant-pitch series at 32 threads per inch.
BSW
British Standard Whitworth threads
BSF
British Standard Fine
Unified Special Threads (UNS)
Special diameter and pitch combinations in the Unified inch thread system.
UNJ Thread Chart
Unified inch thread form with a controlled external thread root radius.
UNRF and UNREF Thread Chart
Fine and extra fine Unified rounded-root thread series.
Unified Miniature Threads (UNM)
Miniature Unified inch screw thread series.
NPT Pipe Threads Chart
General-purpose inch pipe threads, including related NPSC, NPTR, NPSM and NPSL forms.
NPTF Dryseal Pipe Threads Chart
Dryseal inch pipe thread family, including NPTF, NPSF and NPSI forms.
BSPP (G) Parallel Pipe Threads Chart
Parallel pipe threads designated G under ISO 228.
BSPT (R, Rp, Rc) Pipe Threads Chart
Pressure-tight British/ISO pipe thread designations under ISO 7-1.
Hose Coupling Threads Chart
Inch hose coupling thread family, commonly designated NH or NPSH.
Acme Threads Chart
Inch Acme screw thread profile for power transmission.
Stub Acme Threads Chart
Stub Acme screw thread profile for applications with limited thread engagement.
Buttress Inch Threads Chart
Inch buttress screw thread profile for high axial load applications.
Metric Trapezoidal Threads (Tr) Chart
ISO metric trapezoidal screw thread profile.
Metric MJ Threads Chart
Metric aerospace MJ thread form with a controlled external root radius.
British Association (BA) Threads Chart
British Association miniature screw thread series.
ISO Miniature Threads Chart
ISO miniature screw thread series.
Microscope Objective Threads Chart
Standard microscope objective screw thread family.
Class 5 Interference-Fit Threads Chart
Unified inch Class 5 interference-fit thread family.
API Oilfield Threads Chart
API line pipe, round casing and tubing, and buttress casing thread families.
Metric Coarse Threads
ISO metric threads with the standard coarse pitch series.
Metric Fine Threads
ISO metric threads with finer pitches for each nominal diameter.
Metric Extra Fine Threads
Metric fine-pitch thread combinations for compact or thin-wall parts.
UNC and UNRC
Unified National Coarse Threads
UNF
Unified National Fine Threads
UNEF
Unified National Extra Fine Threads
ASME-B1.1
Unified UN, UNR and UNJ thread forms and basic dimensions.
4UN and 4UNR
Unified constant-pitch series at 4 threads per inch.
6UN and 6UNR
Unified constant-pitch series at 6 threads per inch.
8UN and 8UNR
Unified constant-pitch series at 8 threads per inch.
12 UN and 12UNR
Unified constant-pitch series at 12 threads per inch.
16 UN and 16 UNR
Unified constant-pitch series at 16 threads per inch.
20 UN and 20 UNR
Unified constant-pitch series at 20 threads per inch.
28 UN and 28 UNR
Unified constant-pitch series at 28 threads per inch.
32 UN and 32 UNR
Unified constant-pitch series at 32 threads per inch.
BSW
British Standard Whitworth threads
BSF
British Standard Fine
Unified Special Threads (UNS)
Special diameter and pitch combinations in the Unified inch thread system.
UNJ Thread Chart
Unified inch thread form with a controlled external thread root radius.
UNRF and UNREF Thread Chart
Fine and extra fine Unified rounded-root thread series.
Unified Miniature Threads (UNM)
Miniature Unified inch screw thread series.
NPT Pipe Threads Chart
General-purpose inch pipe threads, including related NPSC, NPTR, NPSM and NPSL forms.
NPTF Dryseal Pipe Threads Chart
Dryseal inch pipe thread family, including NPTF, NPSF and NPSI forms.
BSPP (G) Parallel Pipe Threads Chart
Parallel pipe threads designated G under ISO 228.
BSPT (R, Rp, Rc) Pipe Threads Chart
Pressure-tight British/ISO pipe thread designations under ISO 7-1.
Hose Coupling Threads Chart
Inch hose coupling thread family, commonly designated NH or NPSH.
Acme Threads Chart
Inch Acme screw thread profile for power transmission.
Stub Acme Threads Chart
Stub Acme screw thread profile for applications with limited thread engagement.
Buttress Inch Threads Chart
Inch buttress screw thread profile for high axial load applications.
Metric Trapezoidal Threads (Tr) Chart
ISO metric trapezoidal screw thread profile.
Metric MJ Threads Chart
Metric aerospace MJ thread form with a controlled external root radius.
British Association (BA) Threads Chart
British Association miniature screw thread series.
ISO Miniature Threads Chart
ISO miniature screw thread series.
Microscope Objective Threads Chart
Standard microscope objective screw thread family.
Class 5 Interference-Fit Threads Chart
Unified inch Class 5 interference-fit thread family.
API Oilfield Threads Chart
API line pipe, round casing and tubing, and buttress casing thread families.