5.5 mm Wrenches | McMaster-Carr

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37 Products

Stubby Combination Wrenches


6-Point Box Opening
6-Point Box Opening

When working in tight spaces, these short wrenches fit where others can't. Wrenches with a 12-point opening are easier to position on hex fasteners than wrenches with a 6-point opening but make less contact.

Polished wrenches have a mirror-like finish.

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

		Box End		Open End
Size	Overall Lg.	Head Offset Angle	Head Thick.	Opening Angle	Head Thick.	Material	Appearance		Each
6-Point Box Opening
5.5 mm	3 1/8"	15°	5/32"	22.5°	3/32"	Chrome-Plated Steel	Polished	0000000	000000
5.5 mm	3 3/8"	15°	5/32"	15°	5/32"	Chrome-Plated Steel	Dull	00000000	00000

Two-Head Open-End Wrenches

Rounded Openings

Wrenches with square openings provide the best grip on square fasteners.

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

					Dull Chrome Plated
Size	Overall Lg.	Opening Angle	Head Thick.	Material		Each
Rounded Openings
5.5 mm × 7 mm	4 3/4"	15°	9/64" × 9/64"	Steel	0000000	000000

75° Angle Tight-Clearance Open-End Wrenches

One head is angled for access to hard-to-reach fasteners. These slim wrenches fit into tight spaces and around thin fasteners. They are also known as ignition wrenches.

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

Drive Size	Overall Lg.	Opening Angle	Head Thick.	Material	Appearance		Each
5.5 mm	3"	15° × 75°	1/8" × 7/64"	Chrome-Plated Steel	Dull	0000000	00000

Miniature Open-End Wrenches

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

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

Stubby Open-End Wrenches

When turning fasteners in tight spaces, these short wrenches fit where others can't.

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

Size	Overall Lg.	Opening Angle	Head Thick.	Material	Appearance		Each
3.2 mm × 5.5 mm	2 3/4"	15°	3/32" × 3/32"	Chrome-Plated Steel	Dull	000000	00000

75° Angle Tight-Clearance Open-End Wrench Sets

One head is angled 75° for access to hard-to-reach fasteners. These slim wrenches fit into tight spaces and around thin fasteners. They are also known as ignition wrenches.

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

Metric Wrench Sets
Sizes Included	Overall Lg.	Opening Angle	Material	Appearance	Container Type		Each
16-Piece Sets
3.2 mm 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 15 mm 16 mm 17 mm	2 3/4"-5 1/2"	15° × 75°	Chrome-Plated Steel	Dull	Fabric Roll-Up Pouch	0000000	0000000

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 Oxide	Plastic Pouch	0000000	000000

Stubby Open-End Wrench Sets

When turning fasteners in small spaces, these short wrenches fit where others can't.

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

Metric Wrench Sets
Sizes Included	Overall Lg.	Opening Angle	Material	Appearance	Container Type	Specifications Met		Each
6-Piece Sets
3.2 mm × 5.5 mm 4 mm × 5 mm 6 mm × 7 mm 8 mm × 9 mm 10 mm × 11 mm 12 mm × 13 mm	2 3/4"-4 3/8"	15°	Chrome-Plated Steel	Dull	Plastic Roll-Up Pouch	ISO 3318	0000000	000000

6-Point Sockets

Standard

Deep

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

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

			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	000000
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.

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	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.

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

		Standard			Deep
Drive Size	Material	Overall Lg.		Each	Overall Lg.		Each
Metric
Chrome Plated
1/4" Square Drive
5.5 mm	Steel	7/8"	0000000	00000	2"	0000000	000000

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 Oxide	7/8"	00000000	00000

Deep

	Clearance Depth
Size	Nut	Bolt	Material	Finish	Overall Lg.		Each
1/4" Square Drive
5.5 mm	17/64"	1 5/8"	Steel	Black Oxide	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.

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

1/4" Square Drive
Size	Overall Lg.	OD	Material	Finish		Each
5.5 mm	1 1/4"	5/8"	Steel	Black Oxide	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
Drive Size	Overall Lg.	OD	Material		Each
5.5 mm	7/8"	1/2"	Steel	00000000	000000

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	0000000
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

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
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	00000000	000000

L-Keys

Standard Tip

Hex

Turn fasteners from either end and reach into tight spots.

	Length
Drive Size	Overall	Long Leg	Short Leg	Material	Finish		Each
Standard Tip
Hex
5.5 mm	3 1/2"	3 5/16"	1 1/8"	Steel	Black Phosphate Coated	0000000	00000
5.5 mm	5 1/8"	4 7/8"	1 1/8"	Steel	Black Phosphate Coated	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 Phosphate Coated	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
Drive 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 Phosphate Coated	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.

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

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 Phosphate Coated	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.

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

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 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 Phosphate Coated	Plastic	0000000	00000

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.

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

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-cm.		Each
50	Phillips Screwdrivers: No. 000, No. 00, No. 0, No. 1 Slotted Screwdrivers: 0.031", 0.039", 0.047", 0.059", 0.079", 0.098", 0.118", 0.138", 0.157" Hex Screwdrivers (Inch): 1/16", 3/32", 7/64", 1/8" Hex Screwdrivers (Metric): 0.7 mm, 0.9 mm, 1.3 mm, 1.5 mm, 2 mm, 2.5 mm, 3 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

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 Phosphate Coated	0000000	00000