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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
| Thread Size | M4 |
| Material Grade | M35 |
| Coolant Delivery | External |
| Tapping Depth | 10mm |
| Shank Diameter | 4.5mm |
| Material Application | Stainless Steels |
| Square Width | 3.4mm |
| Number of Flutes | 3 |
| Helix Angle | 45 |
| Tap Type | Spiral Flute |
| Thread Direction | Right Hand |
| Ring Colour | Blue |
| Pitch | 0.7 |
| Class of Fit | 6H |
| Finish/Coating | Steam Tempered |
| Overall Length | 63mm |
| Dimensions Standard | DIN 371 |
| Thread Length | 7mm |
| Thread Standard | Metric Coarse |
| Material | Vanadium High Speed Steel |
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