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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
| Material Application | Stainless Steels |
| Tapping Depth | 7.5mm |
| Helix Angle | 45 |
| Thread Standard | Metric Coarse |
| Ring Colour | Blue |
| Shank Diameter | 3.5mm |
| Thread Size | M3 |
| Class of Fit | 6H |
| Pitch | 0.5 |
| Coolant Delivery | External |
| Material | Vanadium High Speed Steel |
| Thread Direction | Right Hand |
| Thread Length | 6mm |
| Dimensions Standard | DIN 371 |
| Material Grade | M35 |
| Overall Length | 56mm |
| Square Width | 2.7mm |
| Finish/Coating | Steam Tempered |
| Tap Type | Spiral Flute |
| Number of Flutes | 3 |
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