Precision Twist Drill 5995842 Cobalt Drill Bit 3/32 in

Product Description

The PRECISION TWIST DRILL 5995842 is a cobalt aircraft extension drill bit designed for demanding drilling applications in hard and abrasive materials. Built to NAS 907 Type J standards, it features a 135-degree split point that is self-centering and web-thinned for accurate, walk-free starting without a center punch. The straw finish indicates a heat-treated cobalt steel construction that maintains cutting hardness at elevated temperatures. With a 3/32-inch diameter and a 1.25-inch flute length on a 6-inch overall body, this bit reaches into recessed areas that standard-length drills cannot access. Licensed tradespeople and aircraft maintenance technicians are the primary installers.

This drill bit is suited for use in aerospace, sheet metal fabrication, HVAC, and general mechanical trade applications where deep reach or clearance drilling in tight spaces is required. The extended 6-inch overall length makes it practical for drilling through structural members, flanges, and assemblies where standard-length bits fall short. The 2-flute spiral design with tapered web and right-hand cutting direction provides efficient chip evacuation in both metal and composite substrates. It is equally at home in a production shop or a field service environment.

Key Features

• Cobalt tool material for sustained cutting performance in hard metals and high-heat conditions
• 135-degree split point with web thinning for self-centering starts and reduced thrust
• 6-inch overall length provides extended reach into deep or obstructed work areas
• Straw finish applied over cobalt steel for added surface hardness and heat resistance
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets NAS 907 Type J standards for aircraft-grade drilling applications

Compatibility

Designed as an OEM-style general-purpose cobalt aircraft extension drill bit compatible with standard 3/32-inch straight-shank drill chucks used in hand drills, drill presses, and pneumatic drilling equipment.

Installation Notes

This bit is installed by machinists, aircraft maintenance technicians, sheet metal workers, and mechanical trade professionals. Secure the straight-cylindrical shank firmly in the chuck before use and verify chuck key is removed prior to operation. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life and reduce heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.