Precision Twist Drill 5998876 Drill Bit Letter M Hss

Product Description

The PRECISION TWIST DRILL 5998876 is a jobber-length, high speed steel drill bit sized to Letter M, equivalent to 0.2950 inches in decimal. Ground to a 118-degree standard point angle with a web-thinned, tapered web configuration, it delivers consistent hole entry and reduced thrust in a wide range of metalworking applications. The bright, uncoated finish suits general-purpose drilling where lubrication is applied at the point of use. Two spiral flutes with a regular helix clear chips efficiently through the 3.0625-inch flute length. Licensed HVAC technicians, pipefitters, electricians, and sheet-metal mechanics will recognize this as a reliable stock drill for everyday production and service work.

This bit is designed for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The straight-cylindrical shank with a 0.2950-inch diameter seats securely in standard three-jaw drill chucks and quick-change holders used on hand drills, drill presses, and CNC machining centers. The Series R10P-R15P-R18P designation places it within a consistent ANSI-standard jobber family, making it a familiar choice for trade shops that stock by series. The 10xD flute-to-diameter ratio supports drilling to a maximum depth of 3.0625 inches in a single pass without retracting for chip clearing under normal conditions.

Key Features

• Letter M sizing at 0.2950 inches decimal for precise hole diameter in metalwork
• 118-degree standard point angle with web-thinned tapered web for reduced entry thrust
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, and titanium
• Bright uncoated finish compatible with cutting fluids and coolants applied externally
• Two regular-helix spiral flutes over 3.0625 inches for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters
• ANSI-standard jobber length at 4.375 inches overall for broad machine compatibility

Compatibility

Designed as an OEM-style jobber-length drill bit conforming to ANSI standards, suitable for use in any standard drill chuck or quick-change holder accepting a 0.2950-inch straight-cylindrical shank. Part of the R10P-R15P-R18P series.

Installation Notes

Installation is performed by machinists, sheet-metal workers, pipefitters, or licensed trade technicians using a drill press, hand drill, or machining center. Secure the shank fully into the chuck and verify concentricity before cutting. Apply a suitable cutting fluid when drilling steel or stainless steel to extend tool life and maintain hole quality. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged to avoid oversized or off-center holes.