High-Performance HSS-E Tap for Accurate Pipe Threads
Machining through holes with imperial pipe threads requires tools that combine toughness with reliable dimensional accuracy. This HSS-E machine tap is a well-engineered solution for demanding threading operations in steel, cast iron, and non-ferrous metals. The premium HSS-E substrate provides excellent wear resistance, supporting efficient workflows even when machining tempered steel or copper and brass alloys. Designed specifically for through holes, it effectively pushes chips forward in the cutting direction, ensuring precise flanks with the standard 55° angle.
Suitable materials

Technical data
- Tool type: Machine tap
- Material: HSS-E
- Hole design: Through hole
- Thread type: Imperial pipe thread
- Flank angle: 55°
- Applicable materials: Steel, cast iron, copper, brass, and aluminum alloys
- Packaging unit: 1 piece
| Tap Typ |
HSS-E |
| Hole |
Trough Hole
|
| Thread |
Imperial |
| Materials |
Steel, Cast Iron and NF-Materials |
| Flank Angle |
55° |
| Packaging unit |
1 Pc. |
Dimensions of HSS-E-Tap through hole, imperial 55°
|
Art. Nr.: |
Thread/D |
L2 |
L |
L4 |
d |
Z |
K |
Kl |
Core Ø |
| GB-D-G1/8-HSS-E |
3301261 |
G1/8 |
20,0 |
90 |
36 |
7,0 |
3 |
5,5 |
8 |
8,8 |
| GB-D-G1/4-HSS-E |
3301262 |
G1/4 |
22,0 |
100 |
40 |
11,0 |
3 |
9 |
12 |
11,8 |
| GB-D-G3/8-HSS-E |
3301263 |
G3/8 |
22,0 |
100 |
40 |
12,0 |
3 |
9 |
12 |
15,25 |
| GB-D-G1/2-HSS-E |
3301264 |
G1/2 |
25,0 |
125 |
50 |
16,0 |
4 |
12 |
15 |
19 |
| GB-D-G3/4-HSS-E |
3301265 |
G3/4 |
28,0 |
140 |
54 |
20,0 |
4 |
16 |
19 |
24,5 |
| GB-D-G1-HSS-E |
3301266 |
G1 |
30,0 |
160 |
60 |
25,0 |
4 |
20 |
23 |
30,75 |
Cutting data
| Workpiece Material |
Tensile strength |
Cutting Speed |
|
(N/mm²) |
Vc (m/min) |
| Structural Steel |
<450 |
10-20 |
| Tempered Steel |
450-700 |
10-15 |
| Cast Iron |
- |
5-15 |
| Aluminum wrought alloys |
- |
10-15 |
| Aluminum cast alloys (<12% Si.) |
<600 |
10-20 |
| Copper/Brass |
<850 |
8-35 |
Applications
This tap opens up versatile possibilities in industrial manufacturing, as well as in plumbing and pipeline construction. It is highly suitable for creating pipe connections according to imperial standards, such as those found in hydraulic components, pneumatic controls, or valve fittings.
Thanks to its broad material compatibility, it can be reliably used in unalloyed structural steel, tempered steel (up to 700 N/mm²), gray cast iron, and cast aluminum alloys. This flexibility makes it an essential threading tool for changing machining tasks in professional environments.
Special features
The construction from high-speed steel (HSS-E) provides a strong foundation for managing the thermal and mechanical stresses encountered during thread cutting. Another key feature is the specialized geometry for through holes, which prevents chip jamming and thereby minimizes the risk of tool breakage or damaged threads. The strict adherence to the 55° flank angle ensures standard-compliant fits for all cut pipe threads.