Half-Moon Wrenches | McMaster-Carr

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

REACH Compliant

	Minimum Hardness Minimum Hardness

Rockwell C13

	Magnetic Properties Magnetic Properties

Magnetic

May Be Mildly Magnetic

	Thrust Load Capacity Thrust Load Capacity

Less than 1,000 lbs.

1,000 to 1,999 lbs.

2,000 to 9,999 lbs.

10,000 to 19,999 lbs.

20,000 lbs. or greater

	Length Length

	Wrench Style Wrench Style

	Box
	Open End

	Opening Shape Opening Shape


12-Point	Rounded

	Height Height

	Passivation Passivation

Passivated

Not Passivated

View catalog pages (15)

Forward

How can we improve?

338 Products

Fastening and Joining

Curved Box Wrenches

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

6-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle.

Tight-Clearance Open-End Wrenches

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

Push-On Retaining Caps

Use these caps to hold components in place and protect shaft ends.

Side-Mount External Retaining Rings

Also known as E-style rings.

Push-On External Retaining Rings

No groove required—press these rings onto the end of a shaft for a firm grip.

Single-Turn Spiral Internal Retaining Rings

Slide these rings into place by hand with a single twist for applications with high thrust loads.

Side-Mount External Retaining Ring Assortments

Also known as E-Style and C-style rings, slide these into the groove from the side of the shaft. They provide a wider shoulder than other external retaining rings for a larger retaining surface.

Single-Turn Spiral External Retaining Rings

Slide these rings into place with one twist—no tools required—for applications with high thrust loads.

Rectangular Push-On External Retaining Rings

Also known as flat-style speed nuts, these have a large surface to distribute loads better than standard and flanged external push rings.

Wide-Grip Side-Mount External Retaining Rings

Also known as poodle rings, these thick rings have "ears" that form a large retaining surface to withstand stronger forces than other side-mount retaining rings.

Rectangular Push Nuts

Also known as flat-style speed nuts, these have large sides, so they're easy to push over threads by hand.

Rectangular Push Nuts for Tapping Screws

Push-On Internal Retaining Rings

No groove required—these rings have teeth that firmly grip the bore.

Tag Rings

Loop these rings onto tags.