📌 Product Overview
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Model: M3.5 × 0.6 D1 2‑flute spiral-point STI plug tap
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Manufacturer: Regal Cutting Tools
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Intended Use: For creating threaded holes sized to accept helical screw thread inserts (STI).
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Material: High-speed steel (HSS), bright/uncoated
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Design: 2 flutes, spiral point (also known as “gun taps”), plug chamfer
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Overall Length: ~2.125″, thread length ~0.75″, shank diameter ~0.168″, square size ~0.131″
🛠 Key Features
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Spiral Point Design: Optimized for pushing chips forward, ideal for through-holes.
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STI Plug Tap: Oversized to ensure proper sizing for insert installation.
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High-Speed Steel: Durable for general machining; uncoated finish for cost‑effective usage.



