| Type |
Specification |
Angle |
Usage |
| Metric Threads |
M |
60° |
General machinery, precision machinery |
| American Threads |
UNC、UNF |
60° |
General machinery, precision machinery |
| American Parallel Pipe Threads |
NPS series |
60° |
Pipe machinery, high, low sealing joint |
| American Taper Pipe Threads |
NPT、NPTR、NPTF |
60° |
Pipe machinery, high, low sealing joint |
| Unified Threads |
W、BSW、BSF |
55° |
General machinery, precision machinery |
| Unified Parallel Pipe Threads |
PF、PT、PS |
55° |
Pipe machinery, high, low sealing joint |
| Metric Trapezoid Threads |
TM |
30° |
Propulsion of lead screws |
| Unified Trapezoid Threads |
TW |
29° |
Propulsion of lead screws |
| -------------------- |
BC、BSC |
60° |
General parts, bicycle |
| -------------------- |
SM |
60° |
Specialized, general sewing |
| American Threads |
ACME |
29°／30° |
Acme thread |
| Serration Spline Teeth |
Fixed Gear |
----- |
Splined shaft to match the splined hold, or higher precision knurling working pieces |
| Knurling Die |
Knurled Rolling Dies |
----- |
For increased surface friction on the working pieces and aesthetics, straight and cross knurling |
| Forming Roller |
Forming Rolling Dies |
----- |
Various specialized threads, convex and concave R based on requirements, low forming resistance on the working pieces |
