Expertly engineered for high-efficiency coarse pitch threading in structural materials, the Guhring Metric Coarse Yellow Ring Bright Finish Spiral Flute Tap range is the definitive industrial choice for machine tapping blind holes. Operating on the standard 60° ISO Metric Coarse thread profile, these premium high-speed steel (HSS-E) tools feature an advanced 40° right-hand spiral flute geometry. This configuration cleanly shears structural materials and forcefully pulls compact chips up and out of the workpiece, completely eliminating the risk of chip packing and catastrophic tool breakage at the bottom of deep pockets. Featuring a premium un-coated bright finish, these tools offer an ultra-sharp cutting edge that significantly reduces friction, lowers cutting torque, and prevents work hardening in ductile workpieces. Guhring's signature Yellow Ring classification tells CNC programmers and machinists that these metric coarse taps are specifically optimized to deliver exceptional tool life and perfect pitch compliance when threading structural steels, mild steel, AS/NZS 3678 250 and 350 grade plate, free-cutting steels, and unalloyed case-hardened steels

HSS APPLICATIONS

• Primary for machine tapping
• Ideal for blind holes 
• Great for cutting new threads
• Suited for use in a variety of ferrous and non-ferrous materials
• Yellow Ring for cutting - Structural steels like mild steel, 250 and 350 plate, Free cutting steels & Unalloyed case hardened steels

HSS TECHNICAL DATA

• Made from High Speed Steel
• Standard  - DIN 376
• Tolerance - ISO2 / 6H
• Surface - Bright Finish
• Guhring No. 822