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HSS blue ring ISO (BLT) metric coarse oxidised spiral flute taps are made with a strong high speed steel with a black oxide finish for deep blind holes with reduced wear and improved heat resistance.
Features and Benefits
High speed steel construction
Black oxide finish for reduced wear and improved heat resistance
Specification
For deep blind holes
Helix angle 45
BTL - Biteless taper
Taper lead to DIN form C (2 x P to 3 x P)
Tapping tolerance to 6H
DIN 371/376
Typical Applications
Tapping
Steel
Stainless steel
Cast iron
| Class of Fit | 6H |
| Material Application | Stainless Steels |
| Pitch | 1.75 |
| Thread Standard | Metric Coarse |
| Tap Type | Spiral Flute |
| Square Width | 7mm |
| Thread Direction | Right Hand |
| Shank Diameter | 9mm |
| Number of Flutes | 3 |
| Material | Vanadium High Speed Steel |
| Dimensions Standard | DIN 376 |
| Tapping Depth | 30mm |
| Finish/Coating | Steam Tempered |
| Helix Angle | 45 |
| Material Grade | M35 |
| Coolant Delivery | External |
| Thread Size | M12 |
| Ring Colour | Blue |
| Overall Length | 110mm |
| Thread Length | 18mm |
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