OSG Threading Tap - UNC Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 5/16 x 18 Indexable Drills With its left‑hand spiral flute

With its left‑hand spiral flute and right‑hand cutting action

minimize leak risks

from professional fabrication to DIY projects

Hardened Steel Construction for Longevity: Crafted from durable

resisting wear and keeping your taps aligned over time

OSG Threading Tap - UNC Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 5/16 x 18 Indexable Drills With its left‑hand spiral fluteOSG UNC Spiral Point Threading Tap delivers precise through hole threading with durable HSS E cobalt and a steam oxide finish, built for machines that demand consistent thread quality and long tool life. Thread form: UNC spiral point geometry for efficient chip evacuation and clean, accurate threads in through hole tapping. Material: HSS E (high speed steel with cobalt) for enhanced hardness, wear resistance, and heat tolerance during threading.