Designed for precision threading in blind-hole applications, the OSG Threading Tap NPT A-Spiral Flute delivers reliable, high-quality 1/8-27 NPT threads with a right-hand orientation. Built for professional use, this tap combines rugged powder-metal construction with a hard TiCN coating to tackle demanding materials and tight tolerances.

• Thread size and type: 1/8-27 NPT, right-hand thread for standard NPT fittings in blind holes
• A-Spiral flute design: Optimized chip evacuation in blind-hole work to minimize clogging and re-cutting
• Material and coating: Powder-metal substrate paired with TiCN coating for superior wear resistance and reduced friction
• Application: Specifically engineered for blind-hole National Pipe Taper threading (NPT) in metal parts
• Standards: Compatible with DIN5156 specifications to support consistent tooling and threading results

This tap excels where clean, precise NPT threads are essential, such as hydraulic and pneumatic components, fluid ports, and lightweight housings. The TiCN coating lowers heat buildup and stretches tool life, while the powder-metal core provides toughness and durability in tough materials. The spiral flute design helps maintain steady cutting action, reducing the risk of chatter and ensuring stable performance even in challenging alloys. Whether you’re retrofitting an old assembly or fabricating new parts, this tap delivers dependable threading with fewer interruptions.