2.5 mm Drill Bits | McMaster-Carr

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Hex	Slotted	Phillips

Torx	Square	Pozidriv®

Tamper- Resistant Torx	Drilled Spanner	Tamper- Resistant Hex

Clutch

	System of Measurement System of Measurement

Inch

Metric

	Size Size	Show

2.5 mm

	Size Size	Hide

	Driver Style Driver Style


Bit	Shaft

	Number of Pieces Number of Pieces

100

	Hex Shank Size Hex Shank Size

1/4"

4mm

	Shank Type Shank Type

	Hex
	Quick- Change Hex
	Knurled- End Hex

	Individual/Set Individual/Set

Individual

Set

	Tip Style Tip Style


Standard	Ball

	Container Type Container Type

Metal Case

Plastic Caddy

Plastic Case

	Overall Length Overall Length

	Material Material

Steel

	Finish Finish

Phosphate Coated

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Access Angle Maximum Access Angle

25°

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43 Products

Hex Bits

Hex Shank

Hex Shank for Power Tools

These multipurpose bits are strong and durable.

Hex shank bits (also known as insert bits) are used in hand drivers or with a bit adapter in power tools.

Hex shank bits for power tools have a groove in the shank and fit directly into power tools without an adapter. They offer more reach for recessed holes and less wobble compared to a hex shank bit used with an adapter.

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

1/4" Hex Shank Size
Drive Size	Overall Lg.	Material		Each
2.5 mm	1"	Steel	0000000	00000
1/4" Hex Shank Size for Power Tools
2.5 mm	2"	Steel	0000000	0000
4 mm Hex Shank Size
2.5 mm	1 1/8"	Steel	0000000	0000

Ball-End Hex Bits

Hex Shank

Hex Shank for Power Tools

When you don't have exact alignment between the fastener and the tool, the ball end allows angled entry to turn screws in hard-to-reach areas.

Hex shank bits (also known as insert bits) are used in hand drivers or with a bit adapter in power tools.

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

1/4" Hex Shank Size
Drive Size	Overall Lg.	Max. Access Angle	Material		Each
2.5 mm	1"	25°	Steel	0000000	00000
1/4" Hex Shank Size for Power Tools
2.5 mm	3"	25°	Steel	0000000	0000

Tamper-Resistant Hex Bits

Hex Shank

Hex Shank for Power Tools

An opening at the tip accommodates the pin in the recess of tamper-resistant hex screws. These are also known as pin-in-hex or pin-in-socket bits.

Hex shank bits (also known as insert bits) are used in hand drivers or with a bit adapter in power tools.

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

1/4" Hex Shank Size
Drive Size	Overall Lg.	Material		Each
2.5 mm	1"	Steel	0000000	00000
1/4" Hex Shank Size for Power Tools
2.5 mm	2"	Steel	0000000	0000

Bit Assortments

These assortments contain general-purpose bits.

Hex shank bits (also known as insert bits) are used in hand drivers or with a bit adapter in power tools.


Hex	Clutch	Tamper-Resistant Hex	Phillips	Slotted
Torx	Square	Drilled Spanner	Pozidriv®	Tamper-Resistant Torx

1/4" Hex Shank Size—Steel
No. of Pieces	Components Included	Bits Included	Adapters Included	Drive Tools Included		Each
29	26 Bits 2 Adapters 1 Drive Tool	Phillips: No. 1, No. 3 (1" O'all Lg.)—1 ea. Phillips: No. 2 (1" O'all Lg.)—2 ea. Slotted: 3/16", 1/4", 9/32" (1" O'all Lg.)—1 ea. Hex (Inch): 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32" 3/16", 7/32", 1/4", 5/16", 3/8" (1" O'all Lg.)—1 ea. Hex (Metric): 2 mm, 2.5 mm, 3 mm, 4 mm 5 mm, 6 mm, 8 mm (1" O'all Lg.)—1 ea.	1/4" Male Square Drive × 1/4" Hex Shank Adapter 2 1/8" Lg. Bit Adapter for Power Tools	7 3/4" Lg. Bit Screwdriver	00000000	000000
35	32 Bits 2 Adapters 1 Drive Tool	Phillips: No. 0, No. 1, No. 2, No. 3 (1" O'all Lg.) Slotted: 7/32", 1/4" (1" O'all Lg.) Hex (Inch): 1/16", 5/64", 3/32", 7/64", 1/8", 9/64" 5/32", 3/16", 7/32", 1/4" (1" O'all Lg.) Hex (Metric): 1.5 mm, 2 mm, 2.5 mm, 3 mm 4 mm, 5 mm, 6 mm (1" O'all Lg.) Torx: T8, T10, T15, T20, T25, T27, T30 (1" O'all Lg.) Square: No. 1, No. 2 (1" O'all Lg.)	1/4" Male Square Drive × 1/4" Hex Shank Adapter 2 1/4" Lg. Bit Adapter for Power Tools	3 1/2" Lg. Tight-Clearance Ratcheting Bit Screwdriver	00000000	00000
40	37 Bits 2 Adapters 1 Drive Tool	Phillips: No. 0, No. 1, No. 2, No. 3 (1" O'all Lg.)—1 ea. Slotted: 7/64", 5/32", 7/32" (1" O'all Lg.)—1 ea. Slotted: 9/32" (1" O'all Lg.)—2 ea. Hex (Inch): 5/64", 3/32", 7/64", 1/8", 9/64" 5/32", 3/16", 7/32", 1/4" (1" O'all Lg.)—1 ea. Hex (Metric): 2.5 mm, 3 mm, 4 mm 5 mm, 6 mm (1" O'all Lg.)—1 ea. Torx: T10, T15, T20, T25, T27 T30, T40 (1" O'all Lg.)—1 ea. Square: No. 0, No. 1, No. 2, No. 3 (1" O'all Lg.)—1 ea. Pozidriv®: No. 1, No. 2 (1" O'all Lg.)—1 ea. Clutch: 5/32" (1" O'all Lg.)—1 ea.	1 7/8" Lg. Bit Adapter for Power Tools 1/4" Male Square Drive × 1/4" Hex Shank Adapter	7 1/2" Lg. Bit Screwdriver	0000000	00000
100	96 Bits 4 Adapters	Phillips: No. 0 (1" O'all Lg.)—1 ea. Phillips: No. 1, No. 3 (1" O'all Lg.)—2 ea. Phillips: No. 2 (1" O'all Lg.)—4 ea. Slotted: 3/32", 1/8", 5/32", 3/16", 7/32", 1/4" 9/32", 5/16", 3/8" (1" O'all Lg.)—1 ea. Hex (Inch): 0.050", 1/16", 5/64", 3/32", 7/64" 1/8", 9/64", 5/32", 3/16", 7/32", 1/4" 5/16", 3/8" (1" O'all Lg.)—1 ea. Hex (Metric): 1.5 mm, 2 mm, 2.5 mm, 3 mm 4 mm, 5 mm, 6 mm, 7 mm, 8 mm (1" O'all Lg.)—1 ea. Tamper-Resistant Hex (Inch): 3/32" 7/64", 1/8", 9/64", 5/32", 3/16", 7/32" 1/4", 5/16" (1" O'all Lg.)—1 ea. Tamper-Resistant Hex (Metric): 2.5 mm, 3 mm 4 mm, 5 mm, 6 mm, 8 mm (1" O'all Lg.)—1 ea. Torx: T5, T6, T7, T8, T9, T10, T15, T20, T25, T27 T30, T40, T45, T50, T55 (1" O'all Lg.)—1 ea. Tamper-Resistant Torx: T6, T7, T8, T9, T10, T15 T20, T25, T27, T30, T40 (1" O'all Lg.)—1 ea. Square: No. 0, No. 1, No. 2, No. 3, No. 4 (1" O'all Lg.)—1 ea. Pozidriv®: No. 1, No. 2, No. 3 (1" O'all Lg.)—1 ea. Drilled Spanner: No. 4, No. 6, No. 8, No. 10 No. 12, 1/4" (1" O'all Lg.)—1 ea. Screw-In Hook Driver Bit—1 ea.	1/4" Male Square Drive × 1/4" Hex Shank Adapter (1" O'all Lg.) 1/4" Male Square Drive × 1/4" Hex Shank Adapter (2" O'all Lg.) 2 1/2" Lg. Bit Adapter for Power Tools Bit Adapter for Square Drive Tools	__	000000	00000
1/4" Hex Shank Size for Power Tools—Steel
50	50 Bits	Phillips: No. 0, No. 1, No. 2, No. 3, No. 4 (2" O'all Lg.)—1 ea. Slotted: 1/8", 9/64", 5/32", 3/16", 7/32", 1/4" 9/32", 5/16" (2" O'all Lg.)—1 ea. Hex (Inch): 0.050", 1/16", 5/64", 3/32", 7/64", 1/8" 9/64", 3/16", 7/32", 1/4" (2" O'all Lg.)—1 ea. Hex (Inch): 5/32" (2" O'all Lg.)—2 ea. Hex (Metric): 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm 6 mm, 8 mm (2" O'all Lg.)—1 ea. Torx: T5, T6, T7, T8, T9, T10, T15, T20, T27 T30, T40 (2" O'all Lg.)—1 ea. Torx: T25 (2" O'all Lg.)—2 ea. Square: No. 0, No. 1, No. 2, No. 3 No. 4 (2" O'all Lg.)—1 ea.	__	__	000000	000000

Precise-Control Bit Assortments

Bits have a knurled shank that allows finger tightening. For more torque, use with the included ratcheting bit screwdriver. They will not fit in standard bit screwdrivers.

Precise-Control Bit Assortments

Hex

Phillips

Slotted

1/4" Knurled-End Hex
No. of Pieces	Components Included	Bits Included	Adapters Included	Extensions Included	Drive Tools Included	Material		Each
27	23 Bits 1 Adapter 1 Extension 2 Drive Tools	Phillips: No. 1, No. 2 (1 3/8" O'all Lg.) Slotted: 3/16", 1/4", 3/8" (1 1/4" O'all Lg.) Hex (Inch): 0.050", 1/16", 5/64", 3/32", 7/64", 1/8" 9/64", 5/32", 3/16", 7/32", 1/4" (1 1/4" O'all Lg.) Hex (Metric): 1.5 mm, 2 mm, 2.5 mm, 3 mm 4 mm, 5 mm, 6 mm (1 1/4" O'all Lg.)	1/4" Male Square Drive × 1/4" Hex Shank Adapter	3 1/2" Lg. Extension	3 3/4" Lg. Tight-Clearance Ratcheting Bit Screwdriver Screwdriver Handle	Steel	0000000	000000

Replacement Precise-Control Bits

Slotted
Size		Each
3/16"	0000000	00000
1/4"	0000000	0000
3/8"	0000000	0000
Phillips
No. 1	0000000	0000
No. 2	0000000	0000
Hex
0.050"	0000000	0000
1/16"	0000000	0000
5/64"	0000000	0000
3/32"	0000000	0000
7/64"	0000000	0000
1/8"	0000000	0000
9/64"	0000000	0000
5/32"	0000000	0000
3/16"	0000000	0000
7/32"	0000000	0000
1/4"	0000000	0000
1.5 mm	0000000	0000
2 mm	0000000	0000
2.5 mm	0000000	0000
3 mm	0000000	0000
4 mm	0000000	0000
5 mm	0000000	0000
6 mm	0000000	0000

Replacement Tight-Clearance Ratcheting Bit Screwdrivers for Precise-Control Bits

Knurled-End Hex
For Bit Hex Shank Size	Overall Lg.	Material		Each
1/4"	3 3/4"	Stainless Steel	0000000	00000

Hex Bit Sets

Hex Shank

Hex shank bits (also known as insert bits) are used in hand drivers or with a bit adapter in power tools.

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

1/4" Hex Shank Size
Components Included	Bits Included	Material		Each
7 Bits	Hex: 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm (1" O'all Lg.)	Steel	0000000	000000

Ball-End Hex Bit Sets

Hex Shank

Hex Shank for Power Tools

When you don't have exact alignment between the fastener and the tool, the ball end allows angled entry to turn screws in hard-to-reach areas.

Hex shank bits (also known as insert bits) are used in hand drivers or with a bit adapter in power tools.

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

1/4" Hex Shank Size
Components Included	Bits Included	Max. Access Angle	Material	Container Type		Each
9 Bits	Hex: 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm (1" O'all Lg.) Hex: 8 mm, 10 mm, 12 mm (1 1/2" O'all Lg.)	25°	Steel	Plastic Caddy	0000000	000000
1/4" Hex Shank Size for Power Tools
9 Bits	Hex: 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm (3" O'all Lg.)	25°	Steel	__	0000000	00000

Tamper-Resistant Hex Bit Sets

Hex Shank

Hex for Power Tools

An opening at the tip accommodates the pin in the recess of tamper-resistant hex screws. These are also known as pin-in-hex or pin-in-socket bits

Hex shank bits (also known as insert bits) are used in hand drivers or with a bit adapter in power tools.

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

1/4" Hex Shank Size
Components Included	Bits Included	Material	Container Type		Each
6 Bits	Tamper-Resistant Hex: 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm (1" O'all Lg.)	Steel	Plastic Caddy	0000000	000000
1/4" Hex Shank Size for Power Tools
6 Bits	Tamper-Resistant Hex: 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm (2" O'all Lg.)	Steel	Plastic Caddy	0000000	00000

Ball-End Driver Shafts

Hex

Create your own tool by attaching these shafts to a handle, or use with socket wrenches and power tools. They have a ball end that allows angled entry to make good contact with the recess when a standard-tip shaft can’t.

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

Hex
Drive Size	Overall Lg.	Max. Access Angle	Material	Finish		Each
2.5 mm	4 1/4"	25°	Steel	Black Phosphate Coated	0000000	00000