Kierretappi NPT 1-11.1/2 DIN-374C HSSE

Machine tap for NPT 1" pipe threads, ground from cobalt-alloyed HSSE for dependable performance in steel, stainless steel, and cast iron. The reinforced shank and Form C chamfer (2-3 threads) make it a solid choice for through-hole threading in demanding industrial work.

Advantages

HSSE with cobalt resists heat and wear, extending tool life even under continuous production loads. The bright finish reduces friction and helps chips flow, while the straight flutes provide good chip evacuation in short-chipping materials. The reinforced shank adds rigidity, reducing deflection and improving thread accuracy.

Suitable for

• Threading NPT 1" tapered pipe threads in steel, stainless steel, and cast iron
• Through-hole applications where chips can be pushed forward
• Use with oil or emulsion coolants for best results
• Machine tapping on CNC or conventional equipment

Key specifications

• Thread standard: NPT (National Pipe Taper)
• Nominal pipe size: 1 inch
• Threads per inch: 11.5
• Material: HSSE (High-Speed Steel with Cobalt)
• Standard: DIN 374C
• Chamfer form: Form C (2-3 threads)
• Flute type: Straight flute
• Cutting direction: Right-hand
• Shank type: Reinforced shank
• Surface treatment: Bright finish
• Overall length (L1): 135 mm
• Shank diameter (d2): 25 mm
• Square drive size (k): 19 mm
• Thread length (L2): 45 mm
• Manufacturing process: Ground thread

Recommendations

For best results, use a suitable tapping fluid and ensure the tap is properly aligned. This tap is ideal for maintenance, repair, and production environments where reliable NPT threads are required.