STI HexTap V-COIL rapid machine tap Form D HSS-G - STI-M 12x1.25

• For STI inserts according to ISO 2 (6H)
• For free-cutting materials up to 900 N/mm²
• For unalloyed and low-alloy steels
• For manual use or cordless drivers
• Suitable for blind and through holes
• Compatible with all 1/4'' bit holders

• Precise production of STI threads
• Ideal for blind and through holes
• Optimal chip evacuation thanks to Form D
• Long tool life due to durable HSS-G
• No adapter needed – 1/4'' hex shank
• Perfect for workshop, service & repair

1. 1. Preparation: Drill STI core diameter, chamfer, clean.
2. 2. Alignment: Align tap perpendicular.
3. 3. Cutting: Continuous feed, by hand or cordless driver.
4. 4. Check: Check thread, insert insert.

• Form: D
• Material: HSS-G
• Tolerance: ISO 1 (4H)
• For inserts according to: ISO 2 (6H)
• Size: STI-M 12 × 1.25
• Overall length (L1): 50 mm
• Thread length (L2): 30 mm
• Diameter (B): 13,6 mm
• Drive: 1/4'' hex shank
• Article number: 03401

• 1 × STI HexTap V-COIL rapid machine tap STI-M 12 x 1.25 (03401)

Tip: Detailed information on difficult threads:
HexTap – The solution for difficult threads

What is an STI thread?
An STI thread is a special oversized thread used for installing thread inserts – ideal for reinforcement or repair.

What does Form D mean?
Optimized chip evacuation, suitable for blind and through holes.

How is the tap used?
With a 1/4'' hex shank – compatible with hand tools or cordless drivers.

Which materials is it suitable for?
Free-machining materials up to 900 N/mm², especially unalloyed and low-alloy steels.

What tolerances apply?
The tap corresponds to ISO 1 (4H); the finished STI thread with insert corresponds to ISO 2 (6H).