What type of holes is this machine tap suitable for?

This tap is designed for threading through holes.

What thread type does this tap cut?

It cuts a right-hand 1" BSPP gas pipe thread with an 11 tpi pitch according to DIN 5156.

What are the shank and square drive dimensions?

The tool features a 25 mm shank diameter and a 20 mm drive square.

What is the maximum cutting depth of this machine tap?

The maximum cutting depth is 30 mm.

Does this tap feature internal coolant channels?

No, this machine tap does not have internal coolant channels.

INTERNATIONAL TOOLS 250953325 ECO PRO HSS-E machine tap DIN 5156 BSP (gas thread) for through-holes 1"-11

Name: INTERNATIONAL TOOLS 250953325 ECO PRO HSS-E machine tap DIN 5156 BSP (gas thread) for through-holes 1"-11
Brand: INTERNATIONAL TOOLS
SKU: 51200714
Price: 205.88 EUR
Availability: InStock

Supplier number: INTERNATIONAL TOOLS 250953325 | EAN 8716563345947

205.88 tax incl.

€170.15 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 2 products in stock.

Ordered before 20:00 - delivered tomorrow 16/10/2026
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Delivery by DHL

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Reliable pipe threading for through holes

Practical benefits

Extended life with HSS-E: The cobalt-alloyed high-speed steel resists thermal buildup and maintains sharp cutting edges throughout demanding machining jobs.
Smooth forward chip evacuation: Engineered for through holes, the cutting geometry pushes swarf forward to prevent clogging and protect thread quality.
Accurate DIN 5156 standard: You produce tight-fitting BSPP 1"-11 gas threads securely driven by the 25 mm shank with 20 mm square.

In a nutshell

The right choise for

With the International Tools eco pro hss-e machine tap din 5156, you achieve clean and accurate pipe threads in through holes. The robust hss-e build with 5% cobalt delivers excellent resistance to heat and wear during demanding machining operations. Designed specifically for through holes, its cutting geometry pushes swarf forward to prevent chip buildup and thread damage. Featuring a 1"-11 bspp thread size, a maximum cutting depth of 30 mm, a 25 mm shank, and a 20 mm square drive, this right-hand tap delivers strong torque transmission and dependable results.

Product information FAQ

€205.88

In stock - tax incl.

Key features according to our expert

Thread size: 1"
Max. cutting depth: 30 mm
Thread type: BSPP
Material (machine tap): HSS-E
With innercooling: No
Application (machine tap): Through hole
Square size: 20 mm
Shank type: External square
Shank size: 25 mm
Cutting direction: Right
Pitch: 11 tpi

Product Description:

International Tools ECO PRO HSS-E Machine Tap DIN 5156 BSP (G)
DIN 5156, 55°, reduced shank, Gun nosed for through holes, lead 3,5-6 chamfer

All Features

Thread size: 1"
Max. cutting depth: 30 mm
Thread type: BSPP
Material (machine tap): HSS-E
With innercooling: No
Application (machine tap): Through hole
Square size: 20 mm
Shank type: External square
Shank size: 25 mm
Cutting direction: Right
Pitch: 11 tpi
Pre-drilling diameter (ø): 30,75 mm
Total length (l1): 160 mm
Tool material: HSS-E
Flute length (l2): 30 mm
Tolerance d2 (tol. d2): h9
Coolant feed: No
Thread diameter (d1): G 1
Square wide (sw): 20 mm
Quality: ECO PRO
Norm: DIN 5156
Shank ø (d2): 25 mm
Hole type: for through holes
Surface: Bright
Shape: B
Pitch-inch (tpi): 11 Threads per inch

Brand INTERNATIONAL TOOLS
51200714
EAN 8716563345947
Supplier number INTERNATIONAL TOOLS 250953325

Frequently asked questions about this product

Answered by specialists

What type of holes is this machine tap suitable for?: This tap is designed for threading through holes.
What thread type does this tap cut?: It cuts a right-hand 1" BSPP gas pipe thread with an 11 tpi pitch according to DIN 5156.
What are the shank and square drive dimensions?: The tool features a 25 mm shank diameter and a 20 mm drive square.
What is the maximum cutting depth of this machine tap?: The maximum cutting depth is 30 mm.
Does this tap feature internal coolant channels?: No, this machine tap does not have internal coolant channels.