953 Cobalt Steel Threaded Shank Drill Bit In #12 Size (0.1890" #12) With Black Oxide Finish, 135° Split Point Geometry And Nas 965 Type D Standard. Designed For Drilling Stainless Steel, Hardened Materials, High-Temperature Alloys And Demanding Aerospace Drilling Applications, This Drill Delivers Accurate Starts, Reduced Walking And Consistent Hole Quality. The 1/4"-28 Threaded Shank Provides Secure Retention In Aircraft, Portable Drill Units And Cnc Quick-Change Holders, While The Stub Length Design Improves Rigidity, Hole Accuracy And Control In Precision Drilling. The Cobalt Steel Substrate Provides High Heat Resistance, Edge Strength And Extended Tool Life In Difficult Materials. Black Oxide Finish Improves Lubricity, Chip Evacuation And Corrosion Resistance For Enhanced Performance In Production, Maintenance And Aircraft Assembly Work. Rocky Mountain Twist.

• Cobalt Steel
• Black Oxide Finish
• 135° Split Point
• Stub Length Threaded Shank Drill Bit
• Drill Size 0.1890" #12
• 1/4"-28 Threaded Shank for Aircraft and Quick-Change Holders
• Split Point Reduces Walking and Improves Hole Accuracy
• Stainless Steel, Alloy Steel and Hi-Temp Alloys
• Made in USA

This item is part of our complete offering of Rocky Mountain Twist Drill Bits & Industrial Drilling Tools, a trusted USA manufacturer known for precision drill bits, holemaking tools, and dependable performance in metalworking, maintenance, and production machining applications. Explore RMT Jobber Length Drills for general-purpose drilling, Aircraft Extension Drills for extended reach applications, Stub Screw Machine Length Drills for rigid drilling setups, Silver and Deming 1/2" Shank Drills for larger diameter holes, and RMT Drill Sets for convenient size assortments. You can also browse Brad Point Drills and Maintenance Drills for specialized drilling needs. Visit our main Rocky Mountain Twist Products page to compare drill styles, sizes, lengths, point types, and performance options to find the right tool for your application.