... .Fully ground 4.TiN, TiAlN Coating1.Materials: Alloy steel (hand taps), HSS-M2, HSSCo5-M35, Carbide (we use the best ... Straight flute, Spiral flute, Spiral pointed, Forming tap. ( machine taps or hand taps )3. Surface treatment: Black oxide, bright, TiN coating, TiAlN ... .7. Service: offer OEM, or become our distributors and agentsSizeOverall LengthThread lengthM1.4x0.3407M1.6x0.35408M1.7x0.35408M1.8x0 ...