Engineered for precision blind hole thread production in low-to-medium tensile alloys, this collection of Guhring UNC yellow ring spiral flute taps features an optimized 40-Degree helix angle paired with a premium uncoated bright finish. The highly polished bright finish minimizes friction and prevents micro-welding or built-up edge (BUE) when machining ductile metals. Manufactured in compliance with stringent DIN 376 dimensional standards—featuring a reduced shank for deep-hole clearance—the helical flutes dynamically lift chips upward and backward out of the blind hole to mitigate the risk of swarf re-cutting. For tier-1 mechanical engineering and structural fabrication facilities operating throughout Australia, this industrial machine tap selection remedies routine mechanical troubleshooting faults—including thread stripping, chip binding, and tool breakage—frequently encountered when threading structural mild steels, unalloyed case-hardened steels, and local Australian AS/NZS 1594 hot-rolled coil or AS/NZS 3678 grade 250 structural plate.

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 - 2B
• Surface - Bright Finish
• Guhring No. 881