Obstruction Wrenches | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Size Size

	Wrench Style Wrench Style


Open End	Box

Combination	Socket

Strap	Spanner

	Opening Shape Opening Shape


12-Point	Rounded

12-Point Secure Grip	Hex Secure Grip

	Individual/Set Individual/Set

Individual

Set

	For Drive Style For Drive Style


External Hex	External 12-Point	External Square

	Square Drive Size Square Drive Size

1/4"

3/8"

1/2"

	Head Style Head Style


Standard	Flex

	Finish Finish

	Material Material

	Socket Style Socket Style


Offset	Flex

	Overall Length Overall Length

	Ratcheting or Nonratcheting Ratcheting or Nonratcheting

Nonratcheting

Ratcheting

	Head Thickness Head Thickness

	Socket Type Socket Type


Socket	Retaining Ring

	Drive Type Drive Type

Manual

Impact

	Number of Heads Number of Heads

	For Use With For Use With

Screws and Nuts

Round and Irregular Objects

Rings, Flanges, and Collars

	Offset Socket Style Offset Socket Style


Open End	Box

	Opening Angle Opening Angle

	Jaw Type Jaw Type

Fixed

Adjustable

	Appearance Appearance

Dull

Polished

	Socket Shape Socket Shape

	6- Point		12- Point

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532 Products

Curved Box Wrenches

Also known as half-moon and obstruction wrenches, the shape lets you reach around obstacles and into machinery.

Square Drive Sockets and Ratchet Wrenches

Ratcheting Box-End
Tight-Clearance Offset Sockets

A ratchet mechanism allows you to turn fasteners without removing and repositioning the socket.

Box-End Tight-Clearance
Offset Sockets

Make maximum contact with all sides of a fastener to reduce slipping. These sockets are also known as torque adapters.

Tight-Clearance Offset Sockets

Often used with an extension, these sockets turn fasteners and fittings in obstructed areas that a regular socket can't reach. They are also known as crowfoot wrenches.

Secure-Grip Tight-Clearance
Offset Sockets

The opening shape makes more contact with fasteners for a better grip than standard open-end sockets. Also known as flare-nut or line wrench sockets, they're often used with flared tube fittings and fuel and hydraulic lines.

Adjustable Tight-Clearance
Offset Sockets

Turn the knob to adjust the jaws and fit a range of fastener sizes.

6-Point Flex Sockets

Pivot the head to access fasteners from an angle.

12-Point Flex Sockets

Pivot the head to access fasteners from an angle.

Flex Spark Plug Sockets

Pivot the head to access fasteners from an angle.

12-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle.

6-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle.

Tight-Clearance Offset Socket Sets

Often used with an extension, these sockets turn fasteners and fittings in obstructed areas that a regular socket can't reach. They are also known as crowfoot wrenches.

Ratcheting Box-End
Tight-Clearance Offset Socket Sets

A ratchet mechanism allows you to turn fasteners without removing and repositioning the socket.

Box-End Tight-Clearance
Offset Socket Sets

Make maximum contact on all sides of a fastener to reduce slipping. These sockets are also known as torque adapters.

Secure-Grip Tight-Clearance
Offset Socket Sets

12-Point Flex Socket Sets

Pivot the head to access fasteners from an angle.

6-Point Flex Impact Socket Sets

Pivot the head to access fasteners from an angle.

One-Piece Socket Retaining Rings

Two-Piece Socket Retaining Rings

Open-End Wrenches

Tight-Clearance Open-End Wrenches

The slim head fits into tight spaces and around thin fasteners.

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

Tight-Clearance
Open-End Wrench Sets

Fit the narrow head into tight spaces and around thin fasteners.

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.

Combination Wrenches

Flex-Head Ratcheting
Combination Wrenches

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

Flex-Head Ratcheting
Combination Wrench Sets

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

Flex-Head Socket Wrenches

Pivot the socket end to access hard-to-reach fasteners.

Adjustable Wrenches

Tight-Clearance Adjustable Wrenches

Fit the thin head and long jaws into narrow spaces.

Flex-Head Adjustable Wrenches

Also known as a basin wrench, this tool has a pivoting head and spring-close jaws for working in tight spaces where it’s difficult to adjust a traditional wrench.

Wide-Opening Tight-Clearance
Adjustable Wrenches

The jaws on these wrenches are shaped to turn slip nuts, jam nuts, and large hex nuts.

Adjustable-Length Flex-Head
Adjustable Wrenches

Extend the handle for additional reach.

Tight-Clearance Adjustable Pin Spanner
Wrenches for Holes on the Face

Tight-Clearance Adjustable
Pin Spanner Wrenches
for Holes on the Face

The slim profile fits the flanges and nuts on the backing pads of portable sanders and grinders.