Undersized Machine Key Assortments

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	Tolerance Rating Tolerance Rating	Show

Undersized

	Tolerance Rating Tolerance Rating	Hide

Undersized

Standard

Oversized

	System of Measurement System of Measurement

Inch

Metric

	Key Type Key Type


Straight	Rounded

	Number of Pieces Number of Pieces

300

	Material Material

1008-1045 Carbon Steel

Steel

	Finish Finish

Zinc Plated

Zinc Yellow-Chromate Plated

	Rounded Keys Included Rounded Keys Included

1/8" × 1/8" × 3/4" Lg.
(2 Pieces)

1/8" × 1/8" × 1" Lg.
(3 Pieces)

3/16" × 3/16" × 3/4" Lg.
(3 Pieces)

3/16" × 3/16" × 3/4" Lg.
(9 Pieces)

3/16" × 3/16" × 1" Lg.
(3 Pieces)

3/16" × 3/16" × 1" Lg.
(9 Pieces)

3/16" × 3/16" × 1 1/2" Lg.
(2 Pieces)

1/4" × 1/4" × 3/4" Lg.
(2 Pieces)

1/4" × 1/4" × 3/4" Lg.
(8 Pieces)

1/4" × 1/4" × 1" Lg.
(3 Pieces)

1/4" × 1/4" × 1" Lg.
(7 Pieces)

1/4" × 1/4" × 1 1/4" Lg.
(2 Pieces)

1/4" × 1/4" × 1 1/4" Lg.
(7 Pieces)

1/4" × 1/4" × 1 1/2" Lg.
(1 Piece)

1/4" × 1/4" × 1 1/2" Lg.
(6 Pieces)

5/16" × 5/16" × 1" Lg.
(1 Piece)

5/16" × 5/16" × 1" Lg.
(3 Pieces)

5/16" × 5/16" × 1 1/2" Lg.
(1 Piece)

5/16" × 5/16" × 1 1/2" Lg.
(3 Pieces)

3/8" × 3/8" × 1" Lg.
(1 Piece)

3/8" × 3/8" × 1" Lg.
(3 Pieces)

3/8" × 3/8" × 1 1/2" Lg.
(1 Piece)

3/8" × 3/8" × 1 1/2" Lg.
(3 Pieces)

4 mm × 4 mm × 40 mm
Lg. (8 Pieces)

4 mm × 4 mm × 80 mm
Lg. (2 Pieces)

5 mm × 5 mm × 40 mm
Lg. (8 Pieces)

5 mm × 5 mm × 80 mm
Lg. (3 Pieces)

6 mm × 6 mm × 40 mm
Lg. (10 Pieces)

6 mm × 6 mm × 80 mm
Lg. (2 Pieces)

7 mm × 7 mm × 80 mm
Lg. (2 Pieces)

8 mm × 7 mm × 40 mm
Lg. (4 Pieces)

8 mm × 7 mm × 80 mm
Lg. (2 Pieces)

8 mm × 8 mm × 40 mm
Lg. (10 Pieces)

8 mm × 8 mm × 80 mm
Lg. (3 Pieces)

10 mm × 8 mm × 40 mm
Lg. (4 Pieces)

10 mm × 8 mm × 80 mm
Lg. (2 Pieces)

10 mm × 10 mm × 40
mm Lg. (4 Pieces)

10 mm × 10 mm × 80
mm Lg. (2 Pieces)

12 mm × 8 mm × 80 mm
Lg. (2 Pieces)

12 mm × 12 mm × 40
mm Lg. (4 Pieces)

12 mm × 12 mm × 80
mm Lg. (2 Pieces)

14 mm × 9 mm × 40 mm
Lg. (4 Pieces)

16 mm × 10 mm × 40
mm Lg. (2 Pieces)

16 mm × 10 mm × 80
mm Lg. (1 Piece)

18 mm × 11 mm × 80
mm Lg. (1 Piece)

20 mm × 12 mm × 80
mm Lg. (1 Piece)

	Container Features Container Features

Compartmented

Lid Chart

	Container Type Container Type

Plastic Box

Cardboard Box

	Key Tolerance Range Key Tolerance Range

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

DFARS Specialty Metals
COTS-Exempt

	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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9 Products

Undersized Machine Key Assortments

Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble parts frequently, such as during maintenance or prototyping. Made of steel, all keys offer good strength.

Rounded keys fill oval keyways completely, reducing stress on the key and shaft. In closed keyways, these keys won’t slide along the shaft. Their rounded ends also make it easy to slide gears, hubs, and other components into place.

Zinc-plated keys resist corrosion in wet environments.

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

Straight Key Assortments

Straight Key

1008-1045 Carbon Steel
Number of Pieces	Straight Keys Included	Key Tolerance	Container Type		Each
58	4 mm × 4 mm × 25 mm Lg. (12 Pieces) 5 mm × 5 mm × 20 mm Lg. (12 Pieces) 5 mm × 5 mm × 25 mm Lg. (12 Pieces) 6 mm × 6 mm × 20 mm Lg. (8 Pieces) 7 mm × 8 mm × 20 mm Lg. (8 Pieces) 7 mm × 8 mm × 32 mm Lg. (6 Pieces)	-0.09mm to 0mm	Plastic Box	0000000	0000000
Zinc-Plated 1008-1045 Carbon Steel
58	1/8" × 1/8" × 3/4" Lg. (3 Pieces) 1/8" × 1/8" × 1" Lg. (3 Pieces) 3/16" × 3/16" × 3/4" Lg. (5 Pieces) 3/16" × 3/16" × 1" Lg. (5 Pieces) 3/16" × 3/16" × 1 1/4" Lg. (5 Pieces) 1/4" × 1/4" × 3/4" Lg. (5 Pieces) 1/4" × 1/4" × 1 1/4" Lg. (5 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (5 Pieces) 5/16" × 5/16" × 1 1/4" Lg. (5 Pieces) 5/16" × 5/16" × 1 1/2" Lg. (5 Pieces) 3/8" × 3/8" × 1 1/4" Lg. (5 Pieces) 3/8" × 3/8" × 1 1/2" Lg. (5 Pieces) 1/2" × 1/2" × 1 1/2" Lg. (2 Pieces)	-0.003" to 0"	Plastic Box	000000000	000000
Zinc-Plated Steel
300	1/8" × 1/8" × 3/4" Lg. (25 Pieces) 1/8" × 1/8" × 1" Lg. (25 Pieces) 3/16" × 3/16" × 3/4" Lg. (25 Pieces) 3/16" × 3/16" × 1" Lg. (25 Pieces) 3/16" × 3/16" × 1-1/4" Lg. (25 Pieces) 3/16" × 3/16" × 1-1/2" Lg. (25 Pieces) 1/4" × 1/4" × 3/4" Lg. (25 Pieces) 1/4" × 1/4" × 1-1/4" Lg. (25 Pieces) 1/4" × 1/4" × 1" Lg. (25 Pieces) 1/4" × 1/4" × 1-1/2" Lg. (25 Pieces) 5/16" × 5/16" × 1-1/4" Lg. (25 Pieces) 5/16" × 5/16" × 1-1/2" Lg. (25 Pieces)	-0.002" to 0"	Plastic Box	000000000	000000

Rounded Key Assortments

Rounded Key

1008-1045 Carbon Steel
Number of Pieces	Rounded Keys Included	Key Tolerance	Container Type		Each
25	1/8" × 1/8" × 3/4" Lg. (2 Pieces) 1/8" × 1/8" × 1" Lg. (3 Pieces) 3/16" × 3/16" × 3/4" Lg. (3 Pieces) 3/16" × 3/16" × 1" Lg. (3 Pieces) 3/16" × 3/16" × 1 1/2" Lg. (2 Pieces) 1/4" × 1/4" × 3/4" Lg. (2 Pieces) 1/4" × 1/4" × 1" Lg. (3 Pieces) 1/4" × 1/4" × 1 1/4" Lg. (2 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (1 Piece) 5/16" × 5/16" × 1" Lg. (1 Piece) 5/16" × 5/16" × 1 1/2" Lg. (1 Piece) 3/8" × 3/8" × 1" Lg. (1 Piece) 3/8" × 3/8" × 1 1/2" Lg. (1 Piece)	-0.002" to 0"	__	0000000	000000
58	3/16" × 3/16" × 3/4" Lg. (9 Pieces) 3/16" × 3/16" × 1" Lg. (9 Pieces) 1/4" × 1/4" × 3/4" Lg. (8 Pieces) 1/4" × 1/4" × 1" Lg. (7 Pieces) 1/4" × 1/4" × 1 1/4" Lg. (7 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (6 Pieces) 5/16" × 5/16" × 1" Lg. (3 Pieces) 5/16" × 5/16" × 1 1/2" Lg. (3 Pieces) 3/8" × 3/8" × 1" Lg. (3 Pieces) 3/8" × 3/8" × 1 1/2" Lg. (3 Pieces)	-0.002" to 0"	Plastic Box	0000000	00000
Zinc-Plated Steel
25	4 mm × 4 mm × 80 mm Lg. (2 Pieces) 5 mm × 5 mm × 80 mm Lg. (3 Pieces) 6 mm × 6 mm × 80 mm Lg. (2 Pieces) 7 mm × 7 mm × 80 mm Lg. (2 Pieces) 8 mm × 7 mm × 80 mm Lg. (2 Pieces) 8 mm × 8 mm × 80 mm Lg. (3 Pieces) 10 mm × 8 mm × 80 mm Lg. (2 Pieces) 10 mm × 10 mm × 80 mm Lg. (2 Pieces) 12 mm × 8 mm × 80 mm Lg. (2 Pieces) 12 mm × 12 mm × 80 mm Lg. (2 Pieces) 16 mm × 10 mm × 80 mm Lg. (1 Piece) 18 mm × 11 mm × 80 mm Lg. (1 Piece) 20 mm × 12 mm × 80 mm Lg. (1 Piece)	-0.03mm to 0mm	Plastic Box	000000000	000000
58	4 mm × 4 mm × 40 mm Lg. (8 Pieces) 5 mm × 5 mm × 40 mm Lg. (8 Pieces) 6 mm × 6 mm × 40 mm Lg. (10 Pieces) 8 mm × 7 mm × 40 mm Lg. (4 Pieces) 8 mm × 8 mm × 40 mm Lg. (10 Pieces) 10 mm × 8 mm × 40 mm Lg. (4 Pieces) 10 mm × 10 mm × 40 mm Lg. (4 Pieces) 12 mm × 12 mm × 40 mm Lg. (4 Pieces) 14 mm × 9 mm × 40 mm Lg. (4 Pieces) 16 mm × 10 mm × 40 mm Lg. (2 Pieces)	-0.03mm to 0mm	Plastic Box	000000000	000000

Undersized Key Stock Assortments

Cut keys to custom lengths. This key stock is undersized, so keys will fit slightly more loosely than standard keys and are best for inconsistent keyways. Use undersized keys when parts need to be taken apart frequently, such as for maintenance or prototyping. Either zinc- or zinc yellow-chromate plated, this key stock resists corrosion in wet environments.

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

Zinc-Plated 1008-1045 Carbon Steel
Number of Pieces	Straight Keys Included	Key Tolerance	Container Type		Each
31	1/8" × 1/8" × 12" Lg. (5 Pieces) 3/16" × 3/16" × 12" Lg. (5 Pieces) 1/4" × 1/4" × 12" Lg. (5 Pieces) 5/16" × 5/16" × 12" Lg. (5 Pieces) 3/8" × 3/8" × 12" Lg. (5 Pieces) 7/16" × 7/16" × 12" Lg. (3 Pieces) 1/2" × 1/2" × 12" Lg. (3 Pieces)	-0.002" to 0"	Cardboard Box	0000000	000000
Zinc Yellow-Chromate Plated 1008-1045 Carbon Steel
31	4 mm × 4 mm × 305 mm Lg. (5 Pieces) 5 mm × 5 mm × 305 mm Lg. (5 Pieces) 6 mm × 6 mm × 305 mm Lg. (5 Pieces) 7 mm × 7 mm × 305 mm Lg. (5 Pieces) 8 mm × 8 mm × 305 mm Lg. (5 Pieces) 10 mm × 10 mm × 305 mm Lg. (3 Pieces) 12 mm × 12 mm × 305 mm Lg. (3 Pieces)	-0.043mm to 0mm	Cardboard Box	0000000	000000