Sutton T172 1 x 8 TPI Spiral Point Tap H - PM-HSS Co - Steam Oxide - DIN 2184-1

The Sutton T172 is a spiral point (gun) tap (H designation) for UNC threads, made from powder metallurgy, 8% cobalt high speed steel (PM-HSS Co) with a blue steam-oxide finish. This listing covers one size: 1 x 8 TPI.

The gun (spiral point) nose curls the chip forward, ahead of the tap and out of the hole, so chip clogging is avoided and coolant can flow without problems. It suits through holes. The H designation is for hard materials that form short chips, with a low rake angle and low thread relief. The chamfer is Form C (3 x P), generally for blind holes.

The thread tolerance is 2BX. The tap is built to DIN 2184-1.

Where this product is used

• Use in harder short chipping materials up to 45 HRC.
• Through holes.
• Suitable for machine operations.
• Depths up to approximately 3 x d1.

Design features

• Powder metallurgy, 8% cobalt high speed steel (PM-HSS Co). The cobalt keeps strength and hardness at very high cutting temperatures, which suits heavy duty tapping of materials up to 45 HRC.
• Blue steam-oxide finish for ferrous metals; it helps prevent chip build-up on the cutting edges and carries lubricant well.
• 4 flutes.
• Form C chamfer, 3 x P.
• Thread tolerance 2BX.
• The H designation is for hard materials that form short chips, with a low rake angle and low thread relief.
• DIN 2184-1 construction.

Sizes

Dimensions are in millimetres. Item numbers are the Sutton catalogue numbers. If you are not sure which tapping drill to use, try our tap drill size selector.

Key specifications

Related products

Related Sutton taps: T171 UNC Spiral Point Tap VA - HSSE - TiCN - DIN 2184-1, T170 UNC Spiral Point Tap VA - HSSE - Steam Oxide - DIN 2184-1, T168 UNC Spiral Point Tap NH - PM-HSSE V3 - Steam Oxide - DIN 2184-1, T167 UNC Spiral Point Tap - HSSE - TiN - DIN 2184-1, T166 UNC Spiral Point Tap - HSSE - Steam Oxide - DIN 2184-1.