General description SwissTech 20.00MM Series 37 HSS-Co 8% 4 Flute Threaded Shank Long Series End Mills are designed for precision machining. These uncoated end mills are suitable for general production machining and feature a threaded shank for secure attachment. Technical specifications Cutter Diameter: 20mm Flute Length: 75mm Overall Length: 141mm Number of Flutes: 4 Shank Diameter: 20mm Shank Diameter Tolerance: h6 Material: Cobalt High Speed Steel Material Grade: M42 Finish/Coating: Uncoated Cutting Direction: Right Hand Flute Type: Helical Length Type: Long Plunge Type: Centre Cutting Series: 37 Shank Type: Threaded Standards Met: DIN 1835D, DIN 844 Other information