HexTap Type DS - Double ended tap, Multi-Drive Form C HSS-G - UN 1" x 8

• For general use with UN internal threads
• Suitable for free-machining materials up to 900 N/mm²
• For unalloyed and low-alloy steels
• For through holes and blind holes (depending on part and depth)
• For hand use
• For cutting new threads
• For re-tapping and repairing damaged threads

• Guide pilot for accurate, aligned starting
• Taper and plug in one tool (double-ended design)
• Practical for hard-to-reach areas
• Internal hex for ratchet or angle screwdriver
• External hex for open-end wrench
• Multi-Drive for flexible handling in service and workshop use

1. Confirm the thread: Check that UN 1″ x 8 is required and whether you are cutting or re-tapping.
2. Prepare the core hole: Make the core hole to the UN specification/thread chart and deburr the bore edge cleanly.
3. Secure the workpiece: Fix the part firmly so you can work without skewing.
4. Choose the drive: Use the internal hex (e.g., ratchet/angle drive) or external hex (open-end wrench) depending on access.
5. Apply cutting fluid: Use a suitable cutting fluid on the tool and in the bore.
6. Start aligned: Use the guide pilot and perform the first turns especially carefully.
7. Cut with control: Work with even torque, relieve briefly if needed and remove chips from flutes/bore.
8. Clean & check: Back the tool out, clean the thread and check fit with a screw/gauge.

• 1x HexTap Type DS – double-ended tap UN 1″ x 8 (Item no. 67901)

• Product type: Double-ended tap (taper and plug in one tool)
• Thread type: UN
• Size: UN 1″ x 8
• Chamfer: Form C
• Material: HSS-G
• Drive: Multi-Drive
• Hand-tool interface: Internal hex (ratchet/angle screwdriver) and external hex (open-end wrench)
• Guidance: Guide pilot for aligned starting
• Application: Hand use
• Article number: 67901

Question: What do I use the HexTap Type DS UN 1″ x 8 for?

Answer: Use it to produce new UN internal threads and to re-tap and repair damaged UN threads in size UN 1″ x 8.

Question: Which materials are suitable according to the product info?

Answer: Suitable are free-machining materials up to 900 N/mm² as well as unalloyed and low-alloy steels.

Question: What does HSS-G mean for this tap?

Answer: HSS-G stands for ground high-speed steel. The ground finish supports dimensional accuracy and a clean cut.

Question: How do I drive the HexTap in practice?

Answer: With Multi-Drive you can work either with a ratchet/angle screwdriver (internal hex) or with an open-end wrench (external hex), depending on access.

Question: Can I use it for through holes and blind holes?

Answer: According to the product info it is suitable for through holes and blind holes. Key factors are core-hole preparation, alignment and clean chip evacuation.

Question: What is the purpose of the guide pilot?

Answer: The guide pilot supports aligned starting – especially helpful for clean, controlled first threads.