Product Code Database
In mechanical engineering, the thread angle of a screw is the included angle between the thread flanks, measured in a plane containing the thread axis.. This is a defining factor for the shape of a screw thread. Standard values include:
| Most V-threads (including ISO, NPT and UTS) | M | 60° | DIN 13 / ISO ? / ASME/ANSI ? | |
| Whitworth threads | W | 55° | DIN 49301 / BS ? | |
| British standard pipe thread | G | 55° | DIN / BS / EN / ISO 228-1 / ISO 7-1 | |
| National Pipe Thread | NPT | 60° | ASME B1.20.-1983 Pipe Threads, General Purpose, Inch | |
| Rd | 30° | Knuckle thread | DIN 405 / DIN 20400 | |
| Acme thread. | 29° | ASME/ANSI B1.5-1988 | ||
| Metric trapezoidal threads | Tr | 30° | DIN 103 | |
| S | 45° | DIN 2781 | ||
| German | S | 30° | DIN 513 | |
| Sq | 0° (parallel) | ? | ||
| Panzergewinde, "steel conduit thread" | Pg | 80° | DIN 40430 | |
| British Association (BA) thread | BA | 47°30'= ° | BS 93:2008 | |
| Löwenherz thread Löwenherz thread | 53°8'≈ ° | |||
| Bodmer thread Bodmer thread | 50° |
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