8 mm Wrenches | McMaster-Carr

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326 Products

Combination Wrenches

Corrosion-Resistant Combination Wrenches

These wrenches are made of stainless steel for excellent corrosion resistance.

Nonsparking Combination Wrenches

Made of materials that are Factory Mutual approved, these wrenches inhibit sparking and are nonmagnetic and corrosion resistant. They satisfy OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present.

Stubby Combination Wrenches

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

Ratcheting Combination Wrenches

Flip these wrenches over to ratchet in the opposite direction.

Reversible Ratcheting Combination Wrenches

A lever reverses the ratchet direction.

Spline Ratcheting Combination Wrenches

A spline-shaped box end turns spline, hex, and 12-point fasteners. This shape also gets a better grip on rounded fasteners that can be difficult to turn with a traditional wrench.

Reversible Stubby Ratcheting
Combination Wrenches

A lever reverses the ratchet direction.

Flex-Head Ratcheting Combination Wrenches

Pivot the box end for access to fasteners in tight spots.

Combination Wrench Sets

Economy Combination Wrench Sets

Suitable for occasional maintenance work, these sets are imported.

Premium Combination Wrench 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.

Corrosion-Resistant Combination Wrench Sets

These wrenches are made of stainless steel for excellent corrosion resistance.

Stubby Combination Wrench Sets

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

Economy Reversible Ratcheting
Combination Wrench Sets

Suitable for occasional maintenance work, these sets are imported.

Flex-Head Ratcheting Combination Wrench Sets

Pivot the box end for access to fasteners in tight spots.

Reversible Stubby Ratcheting
Combination Wrench Sets

A lever reverses the ratchet direction.

Spline Ratcheting Combination Wrench Sets

A spline-shaped box end turns spline, hex, and 12-point fasteners. This shape also gets a better grip on rounded fasteners that can be difficult to turn with a traditional wrench.

Open-End Wrenches

Two-Head Open-End Wrenches

Corrosion-Resistant Open-End Wrenches

These wrenches are made of stainless steel for excellent corrosion resistance.

Two-Head Tight-Clearance Open-End Wrenches

These are also known as tappet wrenches.

75° Angle Tight-Clearance Open-End Wrenches

One head is angled for access to hard-to-reach fasteners. These are also known as ignition wrenches.

Secure-Grip Open-End Wrenches

The opening shape makes more contact with fasteners for a better grip than standard open-end wrenches. These tools are also known as flare-nut or line wrenches.

Stubby Open-End Wrenches

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

Open-End Wrench Sets

Two-Head Tight-Clearance Open-End Wrench Sets

The slim heads fit into tight spaces and around thin fasteners.

75° Angle Tight-Clearance Open-End Wrench Sets

One head is angled 75° for access to hard-to-reach fasteners. These are also known as ignition wrenches.

Stubby Open-End Wrench Sets

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

Secure-Grip Open-End Wrench Sets

The opening shape makes more contact with fasteners for a better grip than standard open-end wrenches. These tools are also known as flare-nut or line wrenches.

Wrench Heads

Reach nuts obstructed by a fluid line or other barrier with these wrench heads.

Sockets

6-Point Sockets

The hex shape achieves the best possible grip on hex fasteners to prevent rounding their points.

Extra-Deep 6-Point Sockets

With more than double the clearance of standard sockets, these sockets access nuts on extra-long bolts.

6-Point Flex Sockets

Pivot the head to access fasteners from an angle.

Fastener-Holding 6-Point Sockets

Hold fasteners securely in place as you drive them.

6-Point Stainless Steel Sockets

Designed for use with stainless steel fasteners, these sockets are more corrosion resistant than steel sockets and less likely to flake.

Nonmarring 6-Point Sockets

With a plastic insert, these sockets firmly grip hex nuts and bolts without rounding them or scratching highly polished finishes.

Bolt-Through 6-Point Sockets

Pair these sockets with a bolt-through ratchet wrench to reach nuts at the bottom of a long threaded rod or bolt which can pass through the socket and the head of the wrench.

12-Point Sockets

Universal-Fit Sockets

Turn multiple shapes and sizes of fasteners with a single socket.

Bit Sockets

Hex Bit Sockets

Stubby Hex Bit Sockets

The short bit on these sockets fits in spaces where height clearance is limited.

Extended-Reach Hex Bit Sockets

Extra-long bits allow access to hard-to-reach fasteners.

Dual-Drive Hex Bit Sockets

When vertical space is tight or you need an extra twist on your socket, use these dual drive hex bit sockets. They work with a standard square drive tool and a box or open end wrench.

Flex Hex Bit Sockets

Tighten and loosen fasteners at an angle by pivoting the head on these sockets.

Extended-Reach Ball-End Hex Bit Sockets

Extra-long bits allow access to hard-to-reach fasteners.

Ball-End Hex Bit Sockets

The ball end allows angled entry when you don't have exact alignment between the socket bit and fastener.

Tamper-Resistant Hex Bit Sockets

These sockets are also known as pin-in-hex or pin-in-socket bits.

Impact Sockets

6-Point Impact Sockets

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

Fastener-Holding 6-Point Impact Sockets

A magnet holds the fastener securely enough to drive self-tapping screws.

6-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle.

12-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle.

Impact Hex Bit Sockets

These sockets are made to withstand the high torque and force of impact tools.

Extended-Reach Impact Hex Bit Sockets

Extra-long bits help you access hard-to-reach fasteners.

Stubby Impact Hex Bit Sockets

The short bit on these sockets fits in spaces where height clearance is limited.

Replacement Bits for Hex Bit Sockets

Switch out worn or damaged bits instead of replacing your entire bit socket.

Continuous-Duty Sockets

Continuous-Duty Hex Bit Sockets

These sockets are designed to tolerate continuous use with power tools and impact tools in high-volume production and assembly.

Continuous-Duty Fastener-Holding 6-Point Sockets

A magnet holds the fastener securely enough to drive self-tapping screws.

Socket Sets

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.

Economy 6-Point Socket Sets

Suitable for occasional maintenance work, these sets are imported.

Bolt-Through 6-Point Socket Sets

Pair the sockets in these sets with the bolt-through ratchet wrench to reach nuts at the bottom of a long threaded rod or bolt.

Fastener-Holding 6-Point Socket Sets

Two spring-loaded balls inside these sockets firmly hold nuts and bolts in place as you turn them, including nonmagnetic fasteners like stainless steel screws.

12-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.

Economy 12-Point Socket Sets

Suitable for occasional maintenance work, these sets are imported.

Wrench Head Sets

Reach nuts obstructed by a fluid line or other barrier with the wrench heads in these sets.

Secure-Grip Wrench Head Sets

Grip more of your fastener head with these wrench heads.

Snap-Open Ratcheting Box-End Wrench Head Sets

Get a strong grip in tight areas, even on fasteners that are rounded or damaged.

Bit Socket Sets

Hex Bit Socket Sets

Stubby Hex Bit Socket Sets

The short bit on these sockets fits in spaces where height clearance is limited.

Extended-Reach Hex Bit Socket Sets

Extra-long bits allow access to hard-to-reach fasteners.

Flex Hex Bit Socket Sets

Pivot the head of the sockets in these sets to access fasteners from an angle.

Dual-Drive Hex Bit Socket Sets

In addition to a standard square drive, the sockets in these sets have a hex-shaped base so you can use a ratchet wrench along with an open-end or box wrench for additional leverage.

Extended-Reach Ball-End Hex Bit Socket Sets

Tighten or loosen hard-to-reach fasteners with the extra-long bits in these socket sets.

Ball-End Hex Bit Socket Sets

The ball end allows angled entry when you don't have exact alignment between the socket bit and fastener.

Maintenance Bit Socket Sets

Keep a convenient variety of drive styles and sizes of bit sockets on hand.

Tamper-Resistant Hex Bit Socket Sets

These sockets are also known as pin-in-hex or pin-in-socket bits.

Impact Socket Sets

6-Point Impact Socket Sets

The hex shape grips hex fasteners and prevents rounding. These sockets are made to withstand the high torque and force of impact tools.

Impact Hex Bit Socket Sets

Use these sockets as an alternative to a screwdriver or L-key. They are made to withstand the high torque and force of impact tools.

Extended-Reach Impact Hex Bit Socket Sets

Extra-long bits help you access hard-to-reach fasteners.

Flex Impact Hex Bit Socket Sets

Pivot the head to access fasteners from an angle.

Box Wrenches

Deep-Offset Box Wrenches

The heads are angled to provide clearance around obstructions.

Two-Head Ratcheting Box Wrenches

Ratchet mechanisms allow you to turn fasteners in tight spaces without removing and repositioning the tool.

Two-Head Deep-Offset Ratcheting Box Wrenches

The 25° offset heads give you additional clearance to turn hard-to-reach fasteners.

Ratcheting Box Wrench Sets

A ratchet mechanism allows you to turn fasteners in tight spaces without removing and repositioning the wrench.

Deep-Offset Ratcheting Box Wrench Sets

The heads are offset to provide clearance for reaching over obstructions.

Bolt-Through Socket Wrenches

Turn nuts on bolts and threaded rods, which can pass through the short end of the wrench. For additional leverage, slip a bar through the short end to create a T-handle.

Changeable-Head Torque Wrenches

Change heads to use these tools as an open-end, box, square drive, or hex-key wrench.

L-Keys

Turn fasteners from either end and reach into tight spots.

L-Key Sets

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

Ball-End L-Keys

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.

Ball-End L-Key Sets

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 spots.

Stubby Ball-End L-Keys

These keys have an extra-short leg to fit into tight spaces that other tools can’t.

Stubby Ball-End L-Key Sets

The extra-short leg of these keys fits in tight spaces other tools can't and the long-leg ball end allows angled entry to turn screws in hard-to-reach areas.

High-Visibility L-Key Sets

These assorted keys have a bright finish that's easy to see, so they’re less likely to be misplaced. They turn fasteners from either end and reach into tight spots.

High-Visibility L-Keys

A bright finish makes these tools stand out, so they're less likely to be misplaced. They turn fasteners from either end and reach into tight spots.

Ball-End High-Visibility L-Key Sets

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.

Ball-End High-Visibility L-Keys

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. These keys have a bright gold-plated finish that makes them easy to see and less likely to be misplaced.

Stubby Ball-End High-Visibility L-Keys

These keys have an extra-short leg to fit into tight spaces that other tools can’t, and a ball on the long leg for angled entry to turn screws in hard-to-reach places. A bright chrome-plated finish makes them easy to see and less likely to be misplaced.

Stubby Ball-End High-Visibility L-Key Sets

All of the keys in these sets have an extra-short leg to fit into tight spots and a ball end to turn screws at an angle in hard-to-reach places. Their bright chrome-plated finish makes them easy to see, reducing the chance you’ll lose them.

Ball-End Screw-Holding L-Key Sets

These assorted keys have a detent that grips inside the recess to ensure screws won’t fall off. The ball end allows angled entry to drive fasteners in hard-to-reach areas.

Ball-End Screw-Holding L-Keys

The ball end has a detent to grip inside the screw recess and allows angled entry to turn fasteners in hard-to-reach areas.

Ball-End Color-Coded L-Key Sets

Sets include assorted keys with each size a different color for easy identification. 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.

Ball-End Color-Coded L-Keys

Each size of these keys is a different color for easy identification. 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.

L-Keys for Stainless Steel Screws

Ball-End L-Key Sets for Stainless Steel Screws

Sets include an assortment of stainless steel keys with a ball end that allows angled entry to turn screws in hard-to-reach areas. Use a stainless steel L-key to protect your stainless steel screws. If steel flakes off a standard tool and into the recess, it can lead to rust and contamination. These keys eliminate that risk.

Ball-End L-Keys for Stainless Steel Screws

The ball end allows angled entry to turn screws in hard-to-reach areas. Protect your stainless steel screws by using a stainless steel L-key. If steel flakes off a standard tool and into the recess, it can lead to rust and contamination. These keys eliminate that risk.

L-Keys for Stainless Steel Screws

Protect your stainless steel screws by using a stainless steel L-key. If steel flakes off a standard tool and into the recess, it can lead to rust and contamination. These keys eliminate that risk.

L-Key Sets for Stainless Steel Screws

Sets include an assortment of stainless steel keys, which protect stainless steel screws. If steel flakes off a standard tool and into the recess, it can lead to rust and contamination. These keys eliminate that risk.

Nonsparking L-Keys

Made of beryllium copper that is FM approved, these keys help meet OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present. They turn fasteners from either end and reach into tight spots.

Nonmagnetic L-Keys

Use these keys where a magnetized tool can cause damage. They are made of corrosion-resistant titanium. Keys turn fasteners from either end.

T-Handle Keys

The T-handle provides a good grip for your whole hand and the long shaft reaches into tight spots.

Ball-End T-Handle Keys

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.

Ball-End T-Handle Key Sets

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.

Ultra-Grip T-Handle Keys

The textured grip provides comfort, slip resistance, and maximum torque. These keys have a long shaft for reaching into tight spots to turn fasteners.

Ultra-Grip T-Handle Key Sets

These assorted keys have a textured grip that provides comfort, slip resistance, and maximum torque. They have a long shaft for reaching into tight spots to turn fasteners.

Ball-End Ultra-Grip T-Handle Keys

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. These keys have a textured grip that provides comfort, slip resistance, and maximum torque.

Ball-End Ultra-Grip T-Handle Key Sets

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. The textured grip provides comfort, slip resistance, and maximum torque.

Looped T-Handle Keys

With a simple loop handle, these keys are the economical choice. They have a long shaft for reaching into tight spots and the T-handle provides a good grip for your whole hand when turning fasteners.

Looped T-Handle Key Sets

The economical choice, these sets include an assortment of keys with a simple loop handle. The long shaft reaches into tight spots and the T-handle provides a good grip for your whole hand when turning fasteners.

Ball-End Two-Tip T-Handle Keys

The long shaft has a ball end for angled entry to turn screws in hard-to-reach areas. The short shaft provides additional torque.

Ball-End Two-Tip T-Handle Key Sets

These sets include an assortment of keys with a ball end on the long shaft, which allows angled entry to turn screws in hard-to-reach areas. The short shaft provides additional torque.

Deep-Reach T-Handle Keys with Replaceable Tips

The extra-long shaft lets you access fasteners in deep recesses. To change tips, use a hex key to loosen the set screw.

Deep-Reach T-Handle Key
Sets with Replaceable Tips

These assorted keys have an extra-long shaft that provides access to fasteners in deep recesses. To change tips, use a hex key to loosen the set screw.

Screw-Holding T-Handle Keys

The ball-end tip has a retaining ring that grips inside the recess to hold screws in place and allows angled entry to turn fasteners in hard-to-reach areas.

Screw-Holding T-Handle Key Sets

These assorted keys have a ball-end tip with a retaining ring that grips inside the recess to hold screws in place and allows angled entry to turn fasteners in hard-to-reach areas.

T-Handle Keys for Stainless Steel Screws

Protect your stainless steel screws by using a stainless steel key. If steel flakes off a standard tool and into the recess, it can lead to rust and contamination. These keys eliminate that risk.

Electrical-Insulating T-Handle Keys

An insulated handle and shaft protect against shock from accidental contact with live electrical circuits. These tools are tested to 1,000 volts to meet IEC and ASTM standards. They have a long shaft that reaches into tight spots to turn fasteners.

Electrical-Insulating T-Handle Key Sets

The assorted keys in these sets have an insulated handle and shaft that protect against shock from accidental contact with live electrical circuits. These tools are tested to 1,000 volts to meet IEC 60900 and ASTM F1505-01. They have a long shaft that reaches into tight spots to turn fasteners.

Screwdrivers

Ultra-Grip Screwdrivers

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

Ball-End Screwdrivers

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.

Ball-End Screwdriver Sets

The assorted drivers in these sets have a ball end that allows angled entry to turn screws in hard-to-reach areas.

Screw-Holding Screwdriver Sets

The assorted drivers in these sets have a holding mechanism at the tip that ensures the screw won’t slip off.

Screw-Holding Screwdrivers

A holding mechanism at the tip of the tool ensures the screw won’t slip off.

Electrical-Insulating Screwdrivers

An insulated handle and shaft protect against shock from accidental contact with live electrical circuits. These tools are tested to 1,000 volts to meet IEC, EN, or ASTM standards.

Screwdriver Bits and Adapters

Hex Bits

Strong and durable, these multipurpose bits are for use with bit screwdrivers.

Ball-End Hex Bits

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.

Tamper-Resistant Hex Bits

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.

Bit Assortments

Assortments contain bits with multiple drive styles.

Hex Bit Sets

Ball-End Hex Bit Sets

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.

Tamper-Resistant Hex Bit Sets

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.

Impact Screwdrivers

Break stuck screws free using screwdriver bits. Strike the end of the handle with a hammer to turn the bit and tighten or loosen fasteners.

Ball-End Driver Shafts

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.

Fold-Up Key Sets

Keep a set of keys neatly in your tool box or pocket to turn multiple fastener sizes.

Ball-End Fold-Up Key Sets

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

High-Visibility Fold-Up Key Sets

Bright-colored handles make these tools stand out, so they’re less likely to be misplaced. Sets include an assortment of keys for turning multiple fastener sizes.

Fold-Up Key Sets with Tether Ring

When working at heights, secure a lanyard to the ring on these tools and prevent drops. Sets include an assortment of keys for turning multiple fastener sizes.

Combination Wrenches

Combination Wrenches

Corrosion-Resistant Combination Wrenches

Nonsparking Combination Wrenches

Stubby Combination Wrenches

Ratcheting Combination Wrenches

Reversible Ratcheting Combination Wrenches

Spline Ratcheting Combination Wrenches

Reversible Stubby RatchetingCombination Wrenches

Flex-Head Ratcheting Combination Wrenches

Combination Wrench Sets

Economy Combination Wrench Sets

Premium Combination Wrench Sets

Corrosion-Resistant Combination Wrench Sets

Stubby Combination Wrench Sets

Economy Reversible RatchetingCombination Wrench Sets

Flex-Head Ratcheting Combination Wrench Sets

Reversible Stubby RatchetingCombination Wrench Sets

Spline Ratcheting Combination Wrench Sets

Open-End Wrenches

Open-End Wrenches

Two-Head Open-End Wrenches

Corrosion-Resistant Open-End Wrenches

Two-Head Tight-Clearance Open-End Wrenches

75° Angle Tight-Clearance Open-End Wrenches

Secure-Grip Open-End Wrenches

Stubby Open-End Wrenches

Open-End Wrench Sets

Two-Head Tight-Clearance Open-End Wrench Sets

75° Angle Tight-Clearance Open-End Wrench Sets

Stubby Open-End Wrench Sets

Secure-Grip Open-End Wrench Sets

Wrench Heads

Wrench Heads

Sockets

6-Point Sockets

Extra-Deep 6-Point Sockets

6-Point Flex Sockets

Fastener-Holding 6-Point Sockets

6-Point Stainless Steel Sockets

Nonmarring 6-Point Sockets

Bolt-Through 6-Point Sockets

12-Point Sockets

Universal-Fit Sockets

Bit Sockets

Hex Bit Sockets

Stubby Hex Bit Sockets

Extended-Reach Hex Bit Sockets

Dual-Drive Hex Bit Sockets

Flex Hex Bit Sockets

Extended-Reach Ball-End Hex Bit Sockets

Ball-End Hex Bit Sockets

Tamper-Resistant Hex Bit Sockets

Impact Sockets

6-Point Impact Sockets

Fastener-Holding 6-Point Impact Sockets

6-Point Flex Impact Sockets

12-Point Flex Impact Sockets

Impact Hex Bit Sockets

Extended-Reach Impact Hex Bit Sockets

Stubby Impact Hex Bit Sockets

Replacement Bits for Hex Bit Sockets

Continuous-Duty Sockets

Continuous-Duty Hex Bit Sockets

Continuous-Duty Fastener-Holding 6-Point Sockets

Socket Sets

6-Point Socket Sets

Economy 6-Point Socket Sets

Bolt-Through 6-Point Socket Sets

Fastener-Holding 6-Point Socket Sets

12-Point Socket Sets

Economy 12-Point Socket Sets

Wrench Head Sets

Wrench Head Sets

Secure-Grip Wrench Head Sets

Snap-Open Ratcheting Box-End Wrench Head Sets

Bit Socket Sets

Hex Bit Socket Sets

Stubby Hex Bit Socket Sets

Extended-Reach Hex Bit Socket Sets

Reversible Stubby Ratcheting
Combination Wrenches

Economy Reversible Ratcheting
Combination Wrench Sets

Reversible Stubby Ratcheting
Combination Wrench Sets

Deep-Reach T-Handle Key
Sets with Replaceable Tips