McMaster-Carr

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	Key Type Key Type


Straight	Woodruff

Step

	System of Measurement System of Measurement

Inch

Metric

	Material Material

Steel

Stainless Steel

	Number of Pieces Number of Pieces

225

401

	Container Features Container Features

Compartmented

Lid Chart

	Tolerance Rating Tolerance Rating

Oversized

Undersized

	Container Type Container Type

Plastic Box

Cardboard Box

Cardboard Tube

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10 Products

Oversized Machine Key Assortments

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

1018-1045 Carbon Steel
Number of Pieces	Straight Keys Included	Size Tolerance, mm	Container Type	Specifications Met		Each
25	4 mm × 4 mm × 3 3/8" Lg. (2 Pieces) 5 mm × 5 mm × 3 3/8" Lg. (2 Pieces) 6 mm × 6 mm × 3 3/8" Lg. (3 Pieces) 7 mm × 7 mm × 3 3/8" Lg. (2 Pieces) 7 mm × 8 mm × 3 3/8" Lg. (2 Pieces) 8 mm × 8 mm × 3 3/8" Lg. (3 Pieces) 8 mm × 10 mm × 3 3/8" Lg. (2 Pieces) 8 mm × 12 mm × 3 3/8" Lg. (2 Pieces) 10 mm × 10 mm × 3 3/8" Lg. (2 Pieces) 10 mm × 16 mm × 3 3/8" Lg. (1 Piece) 11 mm × 18 mm × 3 3/8" Lg. (1 Piece) 12 mm × 12 mm × 3 3/8" Lg. (2 Pieces) 12 mm × 20 mm × 3 3/8" Lg. (1 Piece)	0 to 0.076	Plastic Box	DIN 6885	000000000	000000

Undersized Machine Key Assortments

These keys are slightly undersized to fit in standard keyways. Made from zinc-plated steel, they resist corrosion in wet environments.

Zinc-Plated 1018-1045 Carbon Steel
Number of Pieces	Straight Keys Included	Size Tolerance	Container Type		Each
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

Oversized Key Stock Assortments

Make a key that is the exact length you need. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways.

Zinc-plated steel key stock resists corrosion in wet environments.

18-8 stainless steel key stock is chemical resistant and may be mildly magnetic.

Zinc-Plated 1018-1045 Carbon Steel
Number of Pieces	Straight Keys Included	Size Tolerance	Container Type		Each
7	1/8" × 1/8" × 12" Lg. (1 Piece) 3/16" × 3/16" × 12" Lg. (1 Piece) 3/16" × 1/4" × 12" Lg. (1 Piece) 1/4" × 5/16" × 12" Lg. (1 Piece) 5/16" × 3/8" × 12" Lg. (1 Piece) 3/8" × 7/16" × 12" Lg. (1 Piece) 7/16" × 1/2" × 12" Lg. (1 Piece)	0" to 0.003"	Cardboard Box	000000000	000000
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" to 0.003"	Cardboard Box	000000000	00000
18-8 Stainless Steel
7	1/8" × 1/8" × 12" Lg. (1 Piece) 3/16" × 3/16" × 12" Lg. (1 Piece) 1/4" × 1/4" × 12" Lg. (1 Piece) 5/16" × 5/16" × 12" Lg. (1 Piece) 3/8" × 3/8" × 12" Lg. (1 Piece) 7/16" × 7/16" × 12" Lg. (1 Piece) 1/2" × 1/2" × 12" Lg. (1 Piece)	0" to 0.003"	Cardboard Tube	000000000	00000
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" to 0.003"	Cardboard Box	000000000	000000

Machine Key and Woodruff Key Assortments


	Straight Key
	Woodruff Key

1018-1045 Carbon Steel
Number of Pieces	Straight Keys Included	Woodruff Keys Included	Container Type		Each
401	1/8" × 1/8" × 1 1/2" Lg. (50 Pieces) 3/16" × 1/4" × 1 1/2" Lg. (25 Pieces) 3/16" × 3/16" × 1 1/2" Lg. (30 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (18 Pieces) 5/16" × 5/16" × 1 1/2" Lg. (15 Pieces) 3/8" × 3/8" × 1 1/2" Lg. (15 Pieces)	Key Numbers 3 and 5 (45 Each) Key Numbers 6 and 7 (22 Each) Key Number 9 (30 Each) Key Numbers 10 and A (15 Each) Key Number 13 (12 Each) Key Number 15 (20 Each) Key Numbers C and 21 (9 Each) Key Number G (4 Each)	Plastic Box	000000000	0000000

Woodruff Key Assortments

A rounded bottom allows these keys to rock in their seat to relieve stress on the shaft caused by vibration or misalignment.

1018-1045 Carbon Steel
Number of Pieces	Woodruff Keys Included	Container Type		Each
97	Key Numbers 18 and G (5 Each) Key Numbers 1, 2, 4, 5, 16, 19, 12, 14, 17, 20, 21, 22, 24, D, 23, E, 26, 27, 28, and 29 (1 Each) Key Numbers 3, 7, 6, 8, and 91 (4 Each) Key Number 9 (12 Each) Key Numbers 10, 13, 15, B, and 152 (3 Each) Key Numbers 11 and A (10 Each)	Plastic Box	000000000	000000
225	Key Numbers 11, 13, and A (10 Each) Key Numbers 15, 18, and E (5 Each) Key Numbers 211, 212, 213, 1, 2, 3, 5, 7, 6, 61, 9, and 91 (15 Each)	Plastic Box	000000000	000000

Step Key Assortments

For Gears

For Shafts

For Gears

For Shafts

Also known as offset key stock, use step keys to repair keyways in gears and shafts. Made from zinc-plated steel, they resist corrosion in wet environments.

Zinc-Plated 1018-1045 Carbon Steel
Number of Pieces	Step Keys for Gears Included	Step Keys for Shafts Included	Tolerance Rating	Container Type		Each
7	3/16" (A) × 3/32" (B) × 1/8" (C) × 1/16" (D) × 5/32" Ht. × 12" Lg. (1 Piece) 3/8" (A) × 3/16" (B) × 5/16" (C) × 5/32" (D) × 11/32" Ht. × 12" Lg. (1 Piece)	3/16" (A) × 3/32" (B) 1/4" (C) × 1/8" (D) × 7/32" Ht. × 12" Lg. (1 Piece) 1/4" (A) × 1/8" (B) 5/16" (C) × 1/8" (D) × 1/4" Ht. × 12" Lg. (1 Piece) 1/4" (A) × 1/8" (B) 3/8" (C) × 3/16" (D) × 5/16" Ht. × 12" Lg. (1 Piece) 3/8" (A) × 3/16" (B) 1/2" (C) × 1/4" (D) × 7/16 Ht. × 12" Lg. (1 Piece) 1/2" (A) × 1/4" (B) 5/8" (C) × 5/16" (D) × 9/16" Ht. × 12" Lg. (1 Piece)	Oversized	Cardboard Box	000000000	000000

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