5.5 mm Hex Drivers | McMaster-Carr

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.

		Overall
Size	Bolt Clearance	Lg.	OD	Fastener-Holding Mechanism	Material		Each
1/4" Hex Shank Size for Power Tools
5.5 mm	1/16"	1 5/8"	0.438"	Magnet	Steel	0000000	00000
5.5 mm	1/16"	2 5/8"	0.438"	Magnet	Steel	0000000	0000

Nutdriver Bits

Hex Shank for Power Tools

External Hex

Also known as nut setters, these bits turn hex nuts and cap screws.

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

		Overall
Size	Bolt Clearance	Lg.	OD	Material		Each
1/4" Hex Shank Size for Power Tools
5.5 mm	1/2"	2 5/8"	0.438"	Steel	0000000	00000

Ball-End Screwdrivers

Hex

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. These screwdrivers have a soft, contoured handle that provides comfort and the best possible grip for achieving maximum torque.

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

		Shaft
Size	Overall Lg.	Lg.	O'all Wd.	Max. Access Angle	Material	Finish	Handle Material		Each
Hex
5.5 mm	4 5/16"	5"	7/32"	25°	Steel	Black	Plastic	0000000	00000

Nutdrivers

These standard nutdrivers have a hollow shaft that provides clearance to remove nuts from long bolts.

			Shaft
Size	Overall Lg.	Bolt Clearance	Lg.	O'all Wd.	Material	Handle Material		Each
External Hex
5.5 mm	6 5/8"	3"	3"	3/8"	Chrome-Plated Steel	Plastic	0000000	00000

Nutdriver Sets

Sets include an assortment of nutdrivers.

External Hex
Number of Pieces	Includes	Bolt Clearance	Material	Handle Material	Container Type		Each
10	4 mm Nutdriver—6 5/8" O'all Lg. 4.5 mm Nutdriver—6 5/8" O'all Lg. 5 mm Nutdriver—6 5/8" O'all Lg. 5.5 mm Nutdriver—6 5/8" O'all Lg. 6 mm Nutdriver—6 5/8" O'all Lg. 7 mm Nutdriver—6 5/8" O'all Lg. 8 mm Nutdriver—6 5/8" O'all Lg. 9 mm Nutdriver—6 5/8" O'all Lg. 10 mm Nutdriver—7" O'all Lg. 11 mm Nutdriver—7" O'all Lg.	3"	Chrome-Plated Steel	Plastic	Metal Stand	0000000	000000

Flexible-Shaft Nutdriver Sets

External Hex

Bend the shaft around obstructions to access nuts in tight spots, such as when securing hose clamps. These nutdrivers have a contoured ultra-grip handle that provides comfort and the best possible grip for achieving maximum torque.

External Hex
Number of Pieces	Includes	Bolt Clearance	Material	Shaft Material	Handle Material		Each
7	5 mm Nutdriver—10" O'all Lg. 5.5 mm Nutdriver—10" O'all Lg. 6 mm Nutdriver—10" O'all Lg. 7 mm Nutdriver—10 1/2" O'all Lg. 8 mm Nutdriver—10 1/2" O'all Lg. 10 mm Nutdriver—11 1/2" O'all Lg. 13 mm Nutdriver—11 1/2" O'all Lg.	1/4"-9/16"	Steel	Plastic	Plastic	0000000	0000000

Precise-Control Screwdriver Sets

Hex

Phillips

Slotted

External Hex

Torx

Sets include an assortment of drivers with a rotating end cap on the handle that allows you to apply constant pressure with your palm while turning the body of the screwdriver with your fingertips. They are also known as precision and miniature screwdrivers.

Number of Pieces	Includes	Material	Finish	Handle Material	Container Type		Each
50	Phillips Screwdrivers: No. 000, No. 00, No. 0, No. 1 Slotted Screwdrivers: 1/32", 0.039", 3/64", 1/16", 0.070", 5/64", 3/32", 1/8", 9/64", 5/32" Hex Screwdrivers (Inch): 0.028", 0.035", 0.050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32" Hex Screwdrivers (Metric): 1.27 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm Torx Screwdrivers: T1, T2, T3, T4, T5, T6, T7, T8, T9, T10 Nutdrivers: 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm 5 3/4" Lg. Chip Lifter	Steel	Chrome Plated	Plastic	Metal Frame	00000000	0000000

Static-Control Precise-Control Screwdriver Sets

Hex

Phillips

Slotted

External Hex

Torx

The handle on these assorted ESD-safe screwdrivers drains static away from your application, preventing buildup from electrostatic discharge (ESD) that can damage sensitive equipment. They meet IEC 61340-5-1 requirements for protecting electronic devices from electrostatic discharge. Press the rotating end cap on the handle to apply constant pressure with your palm while turning the body of the screwdriver with your fingertips.

Warning: Because the handle conducts electricity, screwdrivers must not come in contact with sources of electrical power.

Number of Pieces	Includes	Material	Handle Material	Surface Resistivity, ohms		Each
50	Phillips Screwdrivers: No. 000, No. 00, No. 0, No. 1 Slotted Screwdrivers: 0.031", 0.039", 0.047", 0.063", 0.079", 0.094", 0.125", 0.141", 0.157" Hex Screwdrivers (Inch): 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32" Hex Screwdrivers (Metric): 0.71 mm, 0.89 mm, 1.27 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm Torx Screwdrivers: T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T15, T20 Nutdrivers: (Metric) 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm; (Inch): 1/8", 5/32", 3/16", 1/4" 5 3/4" Lg. Chip Lifter	Chrome-Plated Steel	Plastic	10⁶-10⁹	0000000	0000000

Precise-Control Nutdrivers

Apply constant pressure to small hex nuts and cap screws. Press the rotating end cap on the handle with your palm while turning the body of the driver with your fingertips. These tools are also known as precision and miniature nutdrivers.

			Shaft
Size	Bolt Clearance	Overall Lg.	Lg.	O'all Wd.	Material	Handle Material		Each
External Hex
5.5 mm	11/16"	6 3/4"	2 7/16"	5/16"	Chrome-Plated Steel	Plastic	00000000	00000

Precise-Control Nutdriver Sets

Sets include an assortment of drivers that allow you to apply constant pressure to small hex nuts and cap screws. Press the rotating end cap on the handle with your palm while turning the body of the driver with your fingertips. They are also known as precision and miniature nutdrivers.

External Hex
Number of Pieces	Includes	Bolt Clearance	Material	Handle Material		Each
8	2.5 mm Nutdriver—6 1/8" O'all Lg. 3 mm Nutdriver—6 1/8" O'all Lg. 3.5 mm Nutdriver—6 1/8" O'all Lg. 4 mm Nutdriver—6 1/8" O'all Lg. 4.5 mm Nutdriver—6 1/8" O'all Lg. 5 mm Nutdriver—6 1/8" O'all Lg. 5.5 mm Nutdriver—6 3/4" O'all Lg. 6 mm Nutdriver—6 3/4" O'all Lg.	3/8"-11/16"	Chrome-Plated Steel	Plastic	00000000	000000

Static-Control Precise-Control Nutdrivers

Also known as ESD-safe nutdrivers, the handle drains static away from your application, preventing buildup from electrostatic discharge (ESD) that can damage sensitive equipment. Use the rotating end cap on the handle to apply constant pressure with your palm while turning the body of the driver with your fingertips.

Warning: Because the handle conducts electricity, nutdrivers must not come in contact with sources of electrical power.

			Shaft
Size	Bolt Clearance	Overall Lg.	Lg.	O'all Wd.	Material	Finish	Handle Material	Surface Resistivity, ohms		Each
External Hex
5.5 mm	1/2"	6 1/4"	2 1/2"	5/16"	Steel	Black	Plastic	10⁹-10¹¹	00000000	000000

L-Keys

Standard Tip

Hex

Turn fasteners from either end and reach into tight spots.

	Length
Size	Overall	Long Leg	Short Leg	Material	Finish		Each
Standard Tip
Hex
5.5 mm	3 9/16"	3 5/16"	1 3/16"	Steel	Black	0000000	00000
5.5 mm	5 3/16"	4 15/16"	1 3/16"	Steel	Black	0000000	0000

L-Key Sets

With Plastic Caddy

Hex

Sets include an assortment of keys. These simple tools turn fasteners from either end and reach into tight spots.

Hex
Number of Pieces	Includes	Material	Finish	Container Type		Each
Long Length
15	1.27 mm Hex L-Key (2 7/8" O'all Lg.) 1.5 mm Hex L-Key (3 1/8" O'all Lg.) 2 mm Hex L-Key (3 3/8" O'all Lg.) 2.5 mm Hex L-Key (3 5/8" O'all Lg.) 3 mm Hex L-Key (4 1/8" O'all Lg.) 3.5 mm Hex L-Key (4 1/8" O'all Lg.) 4 mm Hex L-Key (4 1/2" O'all Lg.) 4.5 mm Hex L-Key (4 3/4" O'all Lg.) 5 mm Hex L-Key (5" O'all Lg.) 5.5 mm Hex L-Key (5 1/8" O'all Lg.) 6 mm Hex L-Key (5 3/4" O'all Lg.) 7 mm Hex L-Key (5 7/8" O'all Lg.) 8 mm Hex L-Key (6 3/8" O'all Lg.) 9 mm Hex L-Key (6 5/8" O'all Lg.) 10 mm Hex L-Key (7 1/8" O'all Lg.)	Steel	Black	Plastic Caddy	000000	000000

Ball-End L-Keys

Hex

When a standard-tip key can't make good contact with the recess, a ball end allows angled entry to turn screws in hard-to-reach places.

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

	Length
Size	Overall	Long Leg	Short Leg	Max. Access Angle	Material	Finish		Each
Hex
5.5 mm	5 3/16"	4 15/16"	1 3/16"	25°	Steel	Black	0000000	00000

Ball-End L-Key Sets

With Plastic Caddy

Hex

These assorted keys have a ball end that allows angled entry to make good contact with the screw recess when standard-tip keys can’t. Use to turn screws in hard-to-reach areas.

Hex
Number of Pieces	Includes	Max. Access Angle	Material	Finish	Container Type		Each
Long Length
15	1.27 mm Hex L-Key (2 7/8" O'all Lg.) 1.5 mm Hex L-Key (3 1/16" O'all Lg.) 2 mm Hex L-Key (3 3/8" O'all Lg.) 2.5 mm Hex L-Key (3 5/8" O'all Lg.) 3 mm Hex L-Key (4 1/16" O'all Lg.) 3.5 mm Hex L-Key (4 1/8" O'all Lg.) 4 mm Hex L-Key (4 1/2" O'all Lg.) 4.5 mm Hex L-Key (4 11/16" O'all Lg.) 5 mm Hex L-Key (5" O'all Lg.) 5.5 mm Hex L-Key (5 3/16" O'all Lg.) 6 mm Hex L-Key (5 3/4" O'all Lg.) 7 mm Hex L-Key (5 13/16" O'all Lg.) 8 mm Hex L-Key (6 3/8" O'all Lg.) 9 mm Hex L-Key (6 5/8" O'all Lg.) 10 mm Hex L-Key (7 3/16" O'all Lg.)	25°	Steel	Black	Plastic Caddy	0000000	000000

Ball-End High-Visibility L-Key Sets

Gold

Blue

Hex

These assorted keys have a ball end that allows angled entry to turn screws in hard-to-reach areas. The bright finish makes them easy to see and less likely to be misplaced.

Gold-plated keys resist corrosion.

Long Length
Number of Pieces	Includes	Max. Access Angle	Material	Color	Container Type		Each
15	1.27 mm Hex L-Key (2 7/8" O'all Lg.) 1.5 mm Hex L-Key (3 1/16" O'all Lg.) 2 mm Hex L-Key (3 3/8" O'all Lg.) 2.5 mm Hex L-Key (3 5/8" O'all Lg.) 3 mm Hex L-Key (4 1/16" O'all Lg.) 3.5 mm Hex L-Key (4 1/8" O'all Lg.) 4 mm Hex L-Key (4 1/2" O'all Lg.) 4.5 mm Hex L-Key (4 11/16" O'all Lg.) 5 mm Hex L-Key (5" O'all Lg.) 5.5 mm Hex L-Key (5 3/16" O'all Lg.) 6 mm Hex L-Key (5 3/4" O'all Lg.) 7 mm Hex L-Key (5 13/16" O'all Lg.) 8 mm Hex L-Key (6 3/8" O'all Lg.) 9 mm Hex L-Key (6 5/8" O'all Lg.) 10 mm Hex L-Key (7 3/16" O'all Lg.)	25°	Gold-Plated Steel	Gold	Plastic Caddy	0000000	000000
15	1.27 mm Hex L-Key (2 7/8" O'all Lg.) 1.5 mm Hex L-Key (3 1/8" O'all Lg.) 2 mm Hex L-Key (3 3/8" O'all Lg.) 2.5 mm Hex L-Key (3 5/8" O'all Lg.) 3 mm Hex L-Key (4" O'all Lg.) 3.5 mm Hex L-Key (4 1/8" O'all Lg.) 4 mm Hex L-Key (4 1/2" O'all Lg.) 4.5 mm Hex L-Key (4 3/4" O'all Lg.) 5 mm Hex L-Key (4 7/8" O'all Lg.) 5.5 mm Hex L-Key (5 1/8" O'all Lg.) 6 mm Hex L-Key (5 3/4" O'all Lg.) 7 mm Hex L-Key (5 7/8" O'all Lg.) 8 mm Hex L-Key (6 3/8" O'all Lg.) 9 mm Hex L-Key (6 5/8" O'all Lg.) 10 mm Hex L-Key (7 1/8" O'all Lg.)	25°	Painted Steel	Blue	Plastic Caddy	000000	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
Size	Overall Lg.	Max. Access Angle	Material	Finish		Each
5.5 mm	6 1/8"	25°	Steel	Black	0000000	00000

6-Point Sockets

Standard

Deep

Achieve the best possible grip on hex fasteners and prevent rounding.

			Standard			Deep
Size	Material	Specifications Met	Overall Lg.		Each	Overall Lg.		Each
1/4" Square Drive
5.5 mm	Chrome-Plated Steel	ASME B107.110	7/8"	0000000	00000	__	000000	00
5.5 mm	Chrome-Plated Steel	ASME B107.110, SAE AS955	__	000000	00	2"	0000000	00000
3/8" Square Drive
5.5 mm	Chrome-Plated Steel	ASME B107.110	1 1/16"	000000	0000	__	000000	00

6-Point Flex Sockets

Pivot the head to access fasteners from an angle. The hex shape provides the best possible grip on hex fasteners and prevents rounding.

1/4" Square Drive
Size	Overall Lg.	OD	Material		Each
5.5 mm	1 1/4"	31/64"	Chrome-Plated Steel	0000000	000000

12-Point Sockets

Standard

Deep

The 12-point shape quickly positions on hex fasteners. These sockets are for hand-driven use only.

		Standard			Deep
Size	Material	Overall Lg.		Each	Overall Lg.		Each
Chrome Plated
1/4" Square Drive
5.5 mm	Steel	7/8"	0000000	00000	2"	0000000	00000

6-Point Impact Sockets

Achieve the best possible grip on hex fasteners and prevent rounding. These sockets are made to withstand the high torque and force of impact tools.

Standard

	Clearance Depth
Size	Nut	Bolt	Material	Finish	Overall Lg.		Each
1/4" Square Drive
5.5 mm	3/16"	1/2"	Steel	Black	7/8"	00000000	00000

Deep

	Clearance Depth
Size	Nut	Bolt	Material	Finish	Overall Lg.		Each
1/4" Square Drive
5.5 mm	1 1/2"	2"	Steel	Black	2"	00000000	00000

12-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle. These sockets have a 12-point shape that quickly positions on hex fasteners. They are made to withstand the high torque and force of impact tools.

1/4" Square Drive
Size	Overall Lg.	OD	Material	Finish		Each
5.5 mm	1 1/4"	5/8"	Steel	Black	00000000	000000

Fastener-Holding Power Sockets

A magnet holds the fastener securely enough to drive self-tapping screws. These sockets have a hex shape that grips hex fasteners and prevents rounding. They are for use with nonimpact power tools in high-volume production and assembly. Sockets are not for use with impact tools.

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

1/4" Square Drive
Size	Overall Lg.	OD	Material		Each
5.5 mm	7/8"	1/2"	Steel	00000000	00000

Premium 6-Point Socket Sets

Made in the U.S.A., these tools handle the toughest industrial applications, provide the best grip on fasteners, and have a superior finish. The hex shape grips hex fasteners and prevents rounding.

Sockets—Chrome-Plated Steel

1/4" Square Drive
No. of Pieces	Includes		Each
12	Deep Sockets: 4 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm	0000000	000000
12	Standard Sockets: 4 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm	0000000	00000

Sockets with Drive Tools—Chrome-Plated Steel

1/4" Square Drive
No. of Pieces	Components Included	Includes		Each
16	12 Sockets 2 Drive Tools 1 Extension 1 Adapter	Standard Sockets: 4 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm 6" Long Socket Screwdriver Handle 5 1/4" Long Ratchet Wrench 2" Long Extension 1 7/16" Long Flex Adapter	0000000	0000000
30	24 Sockets 3 Drive Tools 2 Extensions 1 Adapter	Standard Sockets: 4 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm Deep Sockets: 4 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm 6" Long Socket Screwdriver Handle 5" Long Ratchet Wrench 4 1/2" Long Sliding-Head Wrench Handle 2" Long Extension 6" Long Extension 1 3/8" Long Flex Adapter	0000000	000000

Foam Socket Organizer for 10 Piece 1/4" Square Drive Size Set	Each	000000
Foam Socket Organizer for 15 Piece 1/2" Square Drive Size Set	Each	00000
Foam Socket Organizer for 19 Piece 3/8" Square Drive Size Set	Each	00000

Value 12-Point Socket Sets

For high quality at a lower price, choose these U.S.A.-made sets. The 12-point shape quickly positions on hex fasteners.

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

Sockets—Chrome-Plated Steel

1/4" Square Drive
No. of Pieces	Includes		Each
10	Standard Sockets: 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm	00000000	000000

Miniature Open-End Wrenches

Sized for working on small equipment, these wrenches are 4 1/8" long with a slim head and handle.

Size	Overall Lg.	Opening Angle	Head Thick.	Material	Finish		Each
5.5 mm	4 1/8"	30°	1/16"	Steel	Black	0000000	00000

Miniature Open-End Wrench Sets

Sized for working on small equipment, these wrenches are 4 1/8" long with a slim head and handle.

Metric Wrench Sets
Sizes Included	Overall Lg.	Opening Angle	Material	Finish	Container Type		Each
8-Piece Sets
2.5 mm 3 mm 3.2 mm 4 mm 5 mm 5.5 mm 6 mm 7 mm	4 1/8"	30°	Steel	Black	Plastic Pouch	0000000	000000