98mm Long Drill Bits | McMaster-Carr

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About Drill Bits

Drill Bit Decimal Size Equivalents

About Reamers

Black and Gold Oxide

Split

These jobbers'-length bits have the rigidity and length required for most applications.

Black-oxide and black-and-gold-oxide drill bits produce less friction than uncoated drill bits.

Drill bits with a split point keep centered without a pilot hole.

For technical drawings and 3-D models, click on a part number.

				Shank					Each
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric
Black-and-Gold Oxide High-Speed Steel
5.6 mm	0.2205"	98mm	63.5mm	Round	5.6mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	00000
5.7 mm	0.2244"	98mm	63.5mm	Round	5.7mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	0000
5.8 mm	0.2283"	98mm	63.5mm	Round	5.8mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	0000
5.9 mm	0.2323"	98mm	63.5mm	Round	5.9mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	0000

Cobalt Steel Drill Bits

Uncoated

These jobbers'-length bits have the rigidity and length required for most applications. Made of cobalt steel, which has better heat and wear resistance than high-speed steel, they can run up to 25% faster and have a longer tool life.

Drill bits with a split point keep centered without a pilot hole.

For technical drawings and 3-D models, click on a part number.

				Shank					Each
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric
Uncoated Cobalt Steel
5.8 mm	0.2283"	98mm	63.5mm	Round	5.8mm	Split	NAS907 Type J	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel	00000000	00000

Short-Length Carbide-Tipped Drill Bits

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than standard-length drill bits. Made of carbide-tipped steel, which has better wear resistance than high-speed steel and cobalt steel, they maintain a sharper, harder edge at high temperatures for excellent performance on abrasive material, such as plastic. Because they aren’t as brittle as solid carbide bits, they can be used in less rigid setups, such as a hand-held drill.

For technical drawings and 3-D models, click on a part number.

				Shank			Standard Point
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	For Use On	Point Angle		Each
Metric
Uncoated Carbide-Tipped Steel
13.0 mm	0.5118"	98mm	39mm	Round	13mm	Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic	118°	000000000	000000
13.5 mm	0.5315"	98mm	40.5mm	Round	13.5mm	Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic	118°	000000000	00000

Hex-Shank Drill Bits with Guide for Countersunk Holes

The built-in guide has a beveled tip that fits into countersunk holes in hardware, such as hinges and latches, to center the bit. Guides are spring loaded; drilling pressure compresses the guide body and extends the drill bit into the workpiece. Insert directly into power screwdrivers, impact drivers, and other tools that accept a 1/4" hex shank. Also known as Vix bits.

For technical drawings and 3-D models, click on a part number.

Drill Bits with Guide
					Shank							Replacement Drill Bits
For Screw Size	Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Guide Material	Point Style	For Use On		Each		Each
Metric
Uncoated High-Speed Steel
5 mm	5 mm	0.1968"	98mm	12.1mm	Quick-Change Hex	6.4mm	Steel	Brad	Steel, Aluminum, Brass, Bronze, Plastic, Wood	0000000	000000	0000000	00000

Metric Size Combination Drill Bit/Round-Shank Reamers for Taper-Pin Holes

The same tool drills and reams holes for taper pins. They have chip breakers on the cutting edge.

For technical drawings and 3-D models, click on a part number.

	Reamer Dia.		Lg.
For Taper Pin Number, mm	(A), mm	(B), mm	Flute, mm	Overall, mm	Number of Flutes	Flute Style	Spiral Direction	Rate of Taper	Point Angle	For Use On		Each
High-Speed Steel
3	4.1600	2.8400	66	98	2	Spiral	Right Hand	1" per 50"	118°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000