Tapped Rounded Machine Keys

	System of Measurement System of Measurement

Inch

Metric

	Width Width

	Length Length

	Height Height

	Thread Size Thread Size

	Key Type Key Type

	Rounded

	Material Material

Steel

	Tolerance Rating Tolerance Rating

Undersized

Oversized

	Specifications Met Specifications Met

ANSI

DIN

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

REACH Compliant

	Threading Threading

	Fully Threaded

	Minimum Hardness Minimum Hardness

Not Rated

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

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

	Thread Pitch Thread Pitch

45 Products

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. Using them in a closed keyway keeps them from sliding along the shaft axis. The rounded ends make it easy to slide gears, hubs, and other components into place. To install, press them in to place. Use them for permanent or high-torque applications, or to replace a key in a worn keyway. Keys are made of steel.

Oversized keys create a tight fit. They conform to ANSI B17.1 Class 2 standards for dimensions and tolerances.

Undersized keys are good when you need a slightly looser fit or when you have an inconsistent keyway. Use them with parts you take apart frequently, such as for maintenance or prototyping. They meet DIN 6885 dimensional standards for undersized keys.

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

		Tolerance
Lg.	Tolerance Rating	Ht.	Wd.	Thread Size	Specifications Met		Each
1018-1045 Carbon Steel
3/16" × 3/16"
1/2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	4-40	ANSI B17.1 Class 2	000000000	00000
3/4"	Oversized	0.000" to 0.001"	0.000" to 0.001"	4-40	ANSI B17.1 Class 2	000000000	0000
1"	Oversized	0.000" to 0.001"	0.000" to 0.001"	4-40	ANSI B17.1 Class 2	000000000	0000
1 1/2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	4-40	ANSI B17.1 Class 2	000000000	0000
1 3/4"	Oversized	0.000" to 0.001"	0.000" to 0.001"	4-40	ANSI B17.1 Class 2	000000000	0000
2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	4-40	ANSI B17.1 Class 2	000000000	0000
1/4" × 1/4"
3/4"	Oversized	0.000" to 0.001"	0.000" to 0.001"	6-32	ANSI B17.1 Class 2	000000000	0000
1"	Oversized	0.000" to 0.001"	0.000" to 0.001"	6-32	ANSI B17.1 Class 2	000000000	0000
1 1/4"	Oversized	0.000" to 0.001"	0.000" to 0.001"	6-32	ANSI B17.1 Class 2	000000000	0000
1 1/2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	6-32	ANSI B17.1 Class 2	000000000	0000
1 3/4"	Oversized	0.000" to 0.001"	0.000" to 0.001"	6-32	ANSI B17.1 Class 2	000000000	0000
2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	6-32	ANSI B17.1 Class 2	000000000	0000
2 1/2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	6-32	ANSI B17.1 Class 2	000000000	0000
3/8" × 3/8"
1 1/2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	10-24	ANSI B17.1 Class 2	000000000	0000
2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	10-24	ANSI B17.1 Class 2	000000000	0000
1/2" × 1/2"
2"	Oversized	0.000" to 0.001"	0.000" to 0.001"	1/4"-20	ANSI B17.1 Class 2	000000000	0000
5 mm × 5 mm
20mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
25mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
40mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
6 mm × 6 mm
20mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
25mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
30mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
32mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
50mm	Undersized	-0.030mm to 0.000mm	-0.030mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
7 mm × 8 mm
20mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
28mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
30mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
32mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
36mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
40mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
45mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
50mm	Undersized	-0.090mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
8 mm × 10 mm
20mm	Undersized	-0.036mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
30mm	Undersized	-0.036mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
36mm	Undersized	-0.036mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
40mm	Undersized	-0.036mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
50mm	Undersized	-0.036mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
56mm	Undersized	-0.036mm to 0.000mm	-0.036mm to 0.000mm	M3 × 0.5 mm	DIN 6885	000000000	0000
8 mm × 12 mm
25mm	Undersized	-0.036mm to 0.000mm	-0.043mm to 0.000mm	M4 × 0.7 mm	DIN 6885	000000000	0000
40mm	Undersized	-0.036mm to 0.000mm	-0.043mm to 0.000mm	M4 × 0.7 mm	DIN 6885	000000000	0000
50mm	Undersized	-0.036mm to 0.000mm	-0.043mm to 0.000mm	M4 × 0.7 mm	DIN 6885	000000000	0000
56mm	Undersized	-0.036mm to 0.000mm	-0.043mm to 0.000mm	M4 × 0.7 mm	DIN 6885	000000000	0000
9 mm × 14 mm
30mm	Undersized	-0.090mm to 0.000mm	-0.043mm to 0.000mm	M5 × 0.8 mm	DIN 6885	000000000	0000
36mm	Undersized	-0.090mm to 0.000mm	-0.043mm to 0.000mm	M5 × 0.8 mm	DIN 6885	000000000	0000
50mm	Undersized	-0.090mm to 0.000mm	-0.043mm to 0.000mm	M5 × 0.8 mm	DIN 6885	000000000	00000