DIN 178 Machine Keys | McMaster-Carr

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DIN

DIN 178

	Specifications Met Specifications Met	Hide

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

	System of Measurement System of Measurement

Metric

	Width Width

	Height Height

	Length Length

305mm

	Material Material

Stainless Steel

	Key Type Key Type

	Straight

	Tolerance Rating Tolerance Rating

Oversized

	Minimum Hardness Minimum Hardness

Rockwell B82

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

REACH Compliant

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

RoHS Compliant

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Machine Key Stock

Cut this square or rectangular key stock to length to create a straight machine key. Straight keys are the most common type of key. Machine keys are often the same material and as hard or harder than the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.

Stainless steel key stock is more corrosion resistant than steel key stock. 18-8 stainless steel key stock offers a balance of strength and corrosion resistance. It may be mildly magnetic.

Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.

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

18-8 Stainless Steel

		Tolerance
Ht. × Wd.	Tolerance Rating	Ht.	Wd.	Minimum Hardness	Specifications Met		Each
305mm Lg.
4mm × 4mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
5mm × 5mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	0000
6mm × 6mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
7mm × 7mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
8mm × 8mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
8mm × 12mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
10mm × 10mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
12mm × 12mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
14mm × 14mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
16mm × 16mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
18mm × 18mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	00000
20mm × 20mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	000000
22mm × 22mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	000000
24mm × 24mm	Oversized	0.000mm to 0.076mm	0.000mm to 0.076mm	Rockwell B82	DIN 178	000000000	000000