High-performance threading insert for internal Whitworth threads
The 16IL size threading insert with a 55° flank angle provides a professional solution for producing high-quality left-hand internal threads. Its precise full profile geometry cleanly forms parallel Whitworth pipe threads (BSPP), supporting the dimensional accuracy of the finished workpiece. Featuring the PVD-coated universal grade RT315, this tool is excellently matched to the demands of machining steel and stainless steel components, establishing a solid foundation for efficient turning processes.
Suitable materials

Technical data
- Insert size: 16
- Design: Internal, Left
- Thread type: Parallel Whitworth Pipe Thread (BSPP)
- Profile: Full profile
- Flank angle: 55°
- Grade: RT315 (PVD-coated)
- Packaging unit: 2 pieces
Dimensions of the threading insert
|
Item Nr. |
ISO |
Pitch |
I.C |
S |
d |
Cutting Data |
| 16IL-V-BSW-11 RT315 (55°) |
1881226 |
16 |
11-Gang |
9,525 |
3,52 |
4 |
Vc= 60-90m/min |
| 16IL-V-BSW-14 RT315 (55°) |
1881227 |
16 |
14-Gang |
9,525 |
3,52 |
4 |
Vc= 60-90m/min |
| 16IL-V-BSW-19 RT315 (55°) |
1881228 |
16 |
19-Gang |
9,525 |
3,52 |
4 |
Vc= 60-90m/min |
Applications
This insert is purposefully designed for demanding thread turning operations in mechanical engineering and manufacturing technology. It is highly suitable for machining parallel pipe threads in piping systems and fittings. Thanks to its robust coating, it can reliably process both standard carbon steels and corrosion-resistant stainless steels, which significantly increases flexibility in everyday workshop applications.
Special features
The PVD coating of the RT315 grade ensures excellent thermal and mechanical resistance, protecting the cutting edge from premature wear. Because of the full profile design, the thread is formed in a clean cut, which reduces the need for time-consuming secondary operations and guarantees consistent thread quality. These characteristics make the tool a sophisticated choice for modern CNC-driven production environments.