DIN Machine Keys | McMaster-Carr

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Warning: Products have one, but not necessarily all, of the selected characteristics.

	System of Measurement System of Measurement

Metric

	Width Width

	Length Length

	Height Height

	Material Material

Steel

Stainless Steel

Brass

	Key Type Key Type


Straight	Rounded

Woodruff	Tapered

	Tolerance Rating Tolerance Rating

Undersized

Oversized

	Minimum Hardness Minimum Hardness

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

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Number of Pieces Number of Pieces

	Container Type Container Type

Plastic Box

	Finish Finish

Zinc Plated

	For Keyway Diameter For Keyway Diameter

	Thread Size Thread Size

	Thread Pitch Thread Pitch

0.5 mm

0.7 mm

0.8 mm

	Container Features Container Features

Compartmented

	For Maximum Keyway Diameter Tolerance For Maximum Keyway Diameter Tolerance

0.000mm

	For Minimum Keyway Diameter Tolerance For Minimum Keyway Diameter Tolerance

-0.200mm

-0.100mm

	Head Height Head Height

	Head Length Head Length

780 Products

Fasteners

Rounded Machine Keys

When installed, these keys fill oval keyways completely, reducing stress on the key and shaft. The rounded ends make it easy to slide gears, hubs, and other components into place. These are also known as feather keys.

Machine Keys

Straight keys, with a square or rectangular cross section, are the most common type of key. Install them in keyways to transmit torque from shafts to gears and other components.

Woodruff Keys

Woodruff keys work well near shaft shoulders and on tapered shafts. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. Use them in light duty applications to connect gears and other components to shafts. Also known as half moon keys.

Tapered Gib Keys

These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. The gib head makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping.

Tapped Rounded Machine Keys

Thread a screw through the tapped hole to pop these keys out of a keyway. When installed, they fill oval keyways completely, reducing stress on the key and shaft. The rounded ends make it easy to slide gears, hubs, and other components into place.

Machine Key Stock

Cut this stock to length to create the machine key you need. Straight keys, with a square or rectangular cross section, are the most common type of key. Install in a keyway to transmit torque from shafts to gears and other components.

Oversized Machine Key Assortments

Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways.