Expertly engineered for high-efficiency coarse pitch threading in heavy-duty structural materials, the Guhring Metric Coarse Gold Ring 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 steam-tempered surface treatment and a 40° right-hand spiral flute geometry. This specific configuration cleanly shears tough material 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. Guhring's signature Gold Ring classification signals to CNC programmers and machinists that these metric taps are structurally 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, unalloyed case-hardened steels, and high-tensile heat-treatable alloys.

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
• Gold Ring for cutting - Structural steels - mild steel, 250 and 350 plate, Free cutting steels, Case hardened steels, Heat treatable steels, Nitriding steels, Spheroidal graphite cast iron

HSS TECHNICAL DATA

• Made from High Speed Steel
• Standard  - DIN 371 & DIN 376
• Tolerance - ISO2 / 6H
• Surface - Steam Tempered
• Guhring No. 5734 & 5717