OSG Threading Tap - NPT Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 1/4 x 18

Achieve precision in blind-hole threading with the OSG 1/4-18 NPT Spiral Flute Threading Tap. Designed for workshop professionals and metalworkers who demand reliable, accurate pipe-thread connections, this tap combines toughness, heat resistance, and efficient chip evacuation for demanding tasks.

• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and heat tolerance during extended use.
• Coating: Steam Oxide finish that reduces friction and improves wear resistance for longer tool life.
• Flute design: Spiral flutes optimized for effective chip evacuation in blind-hole applications, minimizing clogging and re-cutting.
• Size and threading: 1/4-18 NPT threading to fit common small-diameter pipe threads with reliable engagement.
• Application: Ideal for internal threads in blind holes, enabling strong, leak-resistant pipe fittings and hydraulic components in metalworking and maintenance tasks.

Engineered to deliver high-quality, accurate threads with reduced tool wear, this tap supports consistent performance in critical machining tasks. The combination of cobalt-enriched HSS-E and Steam Oxide coating provides a durable solution that stays sharp longer, even under tough drilling conditions. The spiral flute geometry ensures smooth chip removal, helping you maintain steady feed rates and reduce heat buildup during tapping. For best results, pair with proper cutting fluid and the appropriate drill size to achieve precise, ready-to-use 1/4-18 NPT threads in blind-hole workpieces.