SANDVIK Sandvik HSS-PM Blue Spiral Flute PVD FeN coated Tap 7/8" UNF, DIN 2184-1 Long Body

Sandvik UNF 7/8”14 Spiral Flute Tap – Premium Blind-Hole Tapping (DIN 2184-1)

Designed for threading operations in steels, stainless steels, and cast irons (PMK). The 45o spiral flute geometry is optimized for blind holes, efficiently lifting chips out of the hole while maintaining thread precision. Ideal for demanding CNC and conventional machining.

Key Features & Benefits

• Durable Construction – HSS-E substrate with PVD FeN coating maximizes tool life and wear resistance.
• Optimized for Blind Holes – 45o spiral flutes ensure clean chip evacuation and accurate threads.
• Industrial Standard – Built to DIN 2184-1 standards for consistent performance and reliability.
• Accurate Threading – Ground to UNF 2B tolerance class for precision fit in production environments.

Technical SpecificationsSpecificationMetricImperialWorkpiece Material(s)PMKThread SizeUNF 7/8”147/8”-14Thread FormUNF 60oUNF 60oThread Pitch1.81 mm14 TPIThread Diameter22.23 mm0.875 inTap Chamfer Length3.76 mm0.1481 inPremachined Hole Diameter20.4 mm0.8031 inPremachined Hole Type / Hole TypeBlind holeBlind holeThread Tolerance Class2BShank StandardDIN 2184-1Usable Length (LU)92.75 mm3.6516 inFunctional Length (LF)140 mm5.5118 inOverall Length (OAL)140 mm5.5118 inNeck Diameter17.6 mm0.6929 inFlute Count4Flute Helix Angle45oRadial Rake Angle13oThreading Length25 mm0.9843 inThreading Chamfer TypeC = 2-3xTPChip BreakerXMGradeB145SubstrateHSS-ECoatingPVD FeNCoolant Entry / ExitWithout / NoneConnection – Machine SideTap shank DIN-metric 18.00 × 14.50Connection Diameter (Machine Side)18.0 mm0.7087 inConnection Diameter Toleranceh9Weight0.240 kg0.5291 lbMaximum Regrinds0Release Date02/25/2014Release Pack ID14.1-Why Choose This Tool?

The Sandvik UNF 7/8”-14 spiral flute tap combines HSS-E toughness with a PVD FeN coating to ensure long life and reliable cutting performance. Its 45o spiral flute design guarantees efficient chip evacuation in blind holes, making it a reliable choice for threading steels, stainless steels, and cast irons in both CNC and manual applications.