OSG Threading Tap - UNC Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - No. 4 x 40The OSG UNC Spiral Flute Threading Tap is built for precise, reliable threading in blind holes, making it ideal for machinists and fabricators who demand consistent results in metalwork. Size: No. 4 UNC x 40 standard coarse thread tap sized for small fastener work in blind holes. Material: HSSE (highspeed steel with cobalt) for exceptional hardness, wear resistance, and hot hardness in demanding cutting conditions. Coating: Steam Oxide coating to
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OSG Threading Tap - UNC Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - No. 4 x 40