Threads are generally produced according to one of the many standards of thread systems. Standards Development Organizations such as the American National Standards Institute, American Society of Mechanical Engineers, SAE International, International Organization for Standardization, Deutsches Institut für Normung (German Institute for Standardization), British Association and others produce these standards for manufacturers to follow when producing threaded components.
| Standard | Name | Type |
|---|
| ASME B1.1-2003 (R2018) | Unified Inch Screw Threads (UN and UNR Thread Form) | V Thread Form |
| ASME B1.5-1997 (R2014) | Acme Screw Threads | Trapezoidal Thread Form |
| ANSI/ASME B1.9-1973 (R2017) | Buttress Inch Screw Threads | Breech-Lock Thread Form |
| ASME B1.10M-2004 (R2014) | Unified Miniature Screw Threads | V Thread Form |
| ANSI/ASME B1.11-1958 (R2016) | Microscope Objective Thread | V Thread Form |
| ASME B1.13M-2005 (R2015) | Metric Screw Threads: M Profile | V Thread Form |
| ASME B1.15-1995 (R2003) | Unified Inch Screw Threads (UNJ Thread Form) | V Thread Form |
| ASME B1.20.1-2013 | Pipe Threads, General Purpose (Inch) | Pipe Thread Form |
| ANSI B1.20.3-1976 (R2013) | Dryseal Pipe Threads (Inch) | Pipe Thread Form |
| ASME B1.20.7-1991 (R2013) | Hose Coupling Screw Threads - Inch | Pipe Thread Form |
| ASME B1.21M-1997 (R2013) | Metric Screw Threads - MJ Profile | V Thread Form |
| ISO 68-1:1998 | ISO general purpose screw threads—Basic profile—Part 1: Metric screw threads | V Thread Form |
| ISO 68-2:1998 | ISO general-purpose screw threads—Basic profile—Part 2: Inch screw threads | V Thread Form |
| ISO 261:1998 | ISO general purpose metric screw threads—General plan | V Thread Form |
| ISO 262:1998 | ISO general purpose metric screw threads—Selected sizes for screws, bolts and nuts | V Thread Form |
| ISO 724:1993 | ISO general-purpose metric screw threads—Basic dimensions | V Thread Form |
| ISO 725:2009 | ISO inch screw threads—Basic dimensions | V Thread Form 51386 |
| Edison Thread | DIN 40400 | Round V Thread Form |
Thread
nominal size | Outer diameter
[mm (in)] | Threads per inch
(TPI) | Pitch
[in (mm)] | Inner diameter
[mm (in)] | Cable diameter
[mm (in)] |
|---|
| PG7 | 12.5|mm|in|3|abbr=values}} | 20 | 0.05|in|mm|3|abbr=values}} | 11.28|mm|in|3|abbr=values}} | 3|to|6.5|mm|in|3|abbr=values}} |
| PG9 | 15.5|mm|in|3|abbr=values}} | 18 | 0.05556|in|mm|4|abbr=values}} | 13.86|mm|in|3|abbr=values}} | 4|to|8|mm|in|3|abbr=values}} |
| PG11 | 18.6|mm|in|3|abbr=values}} | 18 | 0.05556|in|mm|4|abbr=values}} | 17.26|mm|in|3|abbr=values}} | 5|to|10|mm|in|3|abbr=values}} |
| PG13.5 | 20.4|mm|in|3|abbr=values}} | 18 | 0.05556|in|mm|4|abbr=values}} | 19.06|mm|in|3|abbr=values}} | 6|to|12|mm|in|3|abbr=values}} |
| PG16 | 22.5|mm|in|3|abbr=values}} | 18 | 0.05556|in|mm|4|abbr=values}} | 21.16|mm|in|3|abbr=values}} | 10|to|14|mm|in|3|abbr=values}} |
| PG21 | 28.3|mm|in|3|abbr=values}} | 16 | 0.0625|in|mm|4|abbr=values}} | 26.78|mm|in|3|abbr=values}} | 13|to|18|mm|in|3|abbr=values}} |
| PG29 | 37.0|mm|in|3|abbr=values}} | 16 | 0.0625|in|mm|4|abbr=values}} | 35.48|mm|in|3|abbr=values}} | 18|to|25|mm|in|3|abbr=values}} |
| PG36 | 47.0|mm|in|3|abbr=values}} | 16 | 0.0625|in|mm|4|abbr=values}} | 45.48|mm|in|3|abbr=values}} | |
| PG42 | 54.0|mm|in|3|abbr=values}} | 16 | 0.0625|in|mm|4|abbr=values}} | 52.48|mm|in|3|abbr=values}} | |
| PG48 | 59.3|mm|in|3|abbr=values}} | 16 | 0.0625|in|mm|4|abbr=values}} | 57.78|mm|in|3|abbr=values}} | |
|
1. ^{{harvnb|Degarmo|Black|Kohser|2003|p=741}}.
2. ^BA screw thread series
3. ^BA screw thread series