10.8 mm Drill Bits | McMaster-Carr

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9 Products

About Tool Steel

Drill Bit Decimal Size Equivalents

About Drill Bits

Black Oxide

Black and Gold Oxide

Standard

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-Oxide High-Speed Steel
10.8 mm	0.4252"	142mm	72.4mm	Round	10.8mm	Standard	DIN 338	Steel, Iron, Stainless Steel	00000000	000000
Black-and-Gold Oxide High-Speed Steel
10.8 mm	0.4252"	140mm	99.8mm	Round	10.8mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	00000

Short-Length Drill Bits

Black Oxide

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'- and maintenance-length drill bits.

Black-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-Oxide High-Speed Steel
10.8 mm	0.4252"	95mm	47mm	Round	10.8mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	000000

Cobalt Steel Drill Bits

Titanium Nitride (TiN) Coated

Gold Oxide

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.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.

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
Titanium-Nitride (TiN) Coated Cobalt Steel
10.8 mm	0.4252"	142mm	94mm	Round	10.8mm	Split	DIN 338, NAS907 Type J	Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	0000000	000000
Gold-Oxide Cobalt Steel
10.8 mm	0.4252"	142mm	72.4mm	Round	10.8mm	Split	NAS907 Type J	Steel, Hardened Steel, Iron, Stainless Steel, Nickel	000000000	00000

Chip-Clearing Cobalt Steel Drill Bits

Uncoated

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow. With better heat and wear resistance than high-speed steel, these cobalt steel bits can run up to 25% faster and have a longer tool life. All are jobbers’ length so they have the rigidity and length required for most applications. A split point keeps the bit centered without a pilot hole.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric—Parabolic Spiral Flute
Uncoated Cobalt Steel
10.8 mm	0.4252"	142mm	94mm	Round	10.8mm	Split	DIN 338	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel	00000000	000000

Drill Bit Drawer Cabinets

Store multiple bits of each size. These cabinets have drawers marked with the sizes and decimal equivalents. They can be stacked up to three high.

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

Number of		For Drill Bit		Overall
Compartments	Drawers	Size	Lg. Class	Lg.	Wd.	Ht.	Includes	Material	Features		Each
For Metric Drill Bits
138	4	0.35-2.5 mm (increments of 0.05 mm) 2.6-10.0 mm (increments of 0.1 mm) 10.2 mm 10.5 mm 10.8 mm 11.0 mm 11.2 mm 11.5 mm 11.8 mm 12.0 mm 12.2 mm 12.5 mm 13.0 mm	Jobbers' Length, Short Length	26"	12"	12 1/2"	Two Keys	Steel	Built-In Lock, Undivided bottom drawer for general storage	0000000	0000000

Hex Shank Combination Drill Bits/Taps for Drills and Screwdrivers

With a drill bit point to drive into the workpiece, these taps can drill and tap holes in a single step. A 1/4" hex shank connects them directly to tools such as drills and power screwdrivers. They're made of high-speed steel and are for use on most metal and plastic.

Their spiral flutes keep chips clear by drawing them back toward the tap and out of the hole. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping.

Uncoated taps are strong enough for most tapping jobs but have the shortest tool life.

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

Metric

Thread				Drill Bit						Plug Chamfer
Size	Pitch, mm	Lg.	Overall Lg.	Size	Decimal Size Equivalent	Point Angle	No. of Flutes	Pitch Dia. Limit	Hex Shank Size		Each
Uncoated High-Speed Steel
M12	1.25	1 3/8"	5 1/16"	10.8 mm	0.4251"	118°	2	D5	1/4"	0000000	000000

Hardened Undersized High-Speed M2 Tool Steel Rods

Yield Strength: Not Rated
Hardness: Rockwell C60 (Very Hard)

These rods, also known as drill blanks, have an undersized diameter for machining your own jobbers'-length drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.

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

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Drill Bit Size	Lg.	Mechanical Finish	Straightness Tolerance		Each
10.8mm	-0.0050mm to 0.0000mm	10.8 mm	5 1/2"	Precision Ground	0.012" per ft.	00000000	000000