What does uns mean in threads?
Unified form thread designations are represented by abbreviations such as UNC (unified coarse), UNF (unified fine), UNEF (unified extra fine), UNS (unified special) and UN (unified constant pitch), with the thread major diameter preceding the designation for example, 9/16” UNC, 9/16” UNF.
What angle is a UNS thread?
60°
UNS – Unified Special Thread Series, which is used for special purposes. The flank angle is 60°.
What is UNS thread used for?
Sometimes “special” diameter and pitch combinations (UNS) are used, for example a 0.619 in (15.7 mm) major diameter with 20 threads per inch. UNS threads are rarely used for bolts, but rather on nuts, tapped holes, and threaded ODs.
How many inches is 14 threads?
In the inch series, it is the number of complete threads per inch (if you need to know the pitch of an inch fastener, use the chart below or divide 1 by the number of threads per inch)….Table 1.
| Threads per Inch | Pitch (inches) | Pitch (mm) |
|---|---|---|
| 16 | 0.0625 | 1.588 |
| 14 | 0.0714 | 1.814 |
| 13 | 0.0769 | 1.954 |
| 12 | 0.0833 | 2.117 |
What is un 2B thread?
The UNEF -2B stands for internal normal precision thread with a diameter of 7/8 inch and 20 threads per inch.
What is the difference between UNF and UNS threads?
UNF: Is the symbol for Unified fine pitch threads. UNEF: Is the symbol for United extra fine pitch threads. UNS: Is the symbol for Unified special threads.
What thread is 12 TPI?
1. 12-UN – Unified Extra Fine Thread, which is used for special purposes. The flank angle is 60°.
What does NS thread mean?
special thread
NS means special thread. Pitch Diameter is the basic dimension of a screw, threaded hole, or a tap the diameter of an imaginary cylinder, the surface of which passes through the thread where width of thread and space between threads are identical.
What is UNF 2B thread?
The 14 inch diameter thread with 20 thread per inch is manufactured in accordance with the Unified National Coarse Standard. The UNEF -2B stands for internal normal precision thread with a diameter of 7/8 inch and 20 threads per inch.
What does 16 TPI mean?
Threads Per Inch
Thread Count (TPI) TPI stands for Threads Per Inch. This is simply a count of the number of threads per inch measured along the length of a fastener. TPI is used only with American fasteners.