Precision Twist Drill 5996024 Cobalt Drill Bit Wire 27

Product Description

The PRECISION TWIST DRILL 5996024 is a cobalt aircraft extension drill bit designed for drilling into hard metals and alloys in aerospace, aviation, and industrial maintenance applications. The bit measures 0.144 inches in diameter (Wire Size 27) with an overall length of 6 inches and a spiral flute length of 1.875 inches. The 135-degree split point is self-centering and web-thinned, reducing walking on entry and lowering the thrust required to start the cut. A straw finish indicates the cobalt steel has been heat-treated for added hardness and wear resistance. This bit is installed and used by machinists, aviation mechanics, and maintenance technicians working with tough or stainless-grade materials.

This extension drill bit is suited for reaching into recessed or deep-access locations that standard-length bits cannot reach. The 6-inch overall length provides the clearance needed for aircraft skin work, structural assembly, and heavy-equipment maintenance. The right-hand cutting direction and straight-cylindrical shank allow it to seat in standard drill chucks and pneumatic drilling equipment common on production floors and MRO work. The Series CO501-6 designation identifies it within the Precision Twist Drill cobalt extension drill lineup for general-purpose metal cutting.

Key Features

• 0.144 inch (Wire Size 27) diameter with straight-cylindrical shank of matching diameter
• 135-degree split point with web thinning for self-centering and reduced entry thrust
• Cobalt tool material with straw finish for improved hardness and heat resistance in tough alloys
• 6 inch overall length for extended reach in aircraft and structural drilling applications
• 1.875 inch spiral flute length with tapered web configuration for efficient chip evacuation
• Meets NAS 907 Type J standards for aircraft-grade drilling performance

Compatibility

Designed as an OEM-style aircraft extension drill bit for use in standard drill chucks and pneumatic drilling equipment accepting a 0.144 inch straight-cylindrical shank; suitable for general-purpose drilling in steel, stainless, and hard alloys per NAS 907 Type J requirements.

Installation Notes

This bit is typically installed and operated by machinists, aviation mechanics, or maintenance technicians. Secure the straight-cylindrical shank firmly in a keyed or keyless drill chuck before use, and verify chuck capacity accommodates a 0.144 inch shank. Use appropriate cutting fluid when drilling stainless or hardened alloys to extend bit life and manage heat buildup. Follow applicable shop safety procedures and applicable aerospace maintenance standards when performing structural drilling work.