Carbon Steel Discs | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Diameter Diameter

	Length Length

	Shape Shape


Rod and Disc	Keyed

	Material Material

Low-Carbon Steel

1045 Carbon Steel

1008-1010 Carbon Steel

	Fabrication Fabrication

Cold Worked

Hot Rolled

	Tolerance Rating Tolerance Rating

Undersized

Oversized

	Yield Strength Yield Strength

	Certificate Certificate

	Material Certificate with Traceable Lot Number

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

DFARS Specialty Metals
COTS-Exempt

	Elongation Elongation

	Maximum Hardness After Heat Treatment Maximum Hardness After Heat Treatment

Rockwell C60

Rockwell C62

Not Rated

	Hardness Hardness

	Specifications Met Specifications Met

ASTM A108

ASTM A29

ASTM A576

	ID ID

1 1/2"

	OD OD

1 1/2"

2 1/8"

2 3/4"

	Thickness Thickness

	Tab Depth Tab Depth

3/32"

5/32"

3/16"

	Tab Width Tab Width

1/4"

3/8"

1/2"

	For Shaft Diameter For Shaft Diameter

1 1/2"

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184 Products

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Yield Strength: See table
Hardness: See table
Heat Treatable: Yes
Max. Hardness After Heat Treatment: See table
Specifications Met: See table

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating.

If you don't see the size you're looking for, please specify a length under additional rod lengths.

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

Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.

Discs

1/2" Lg.
Dia.	Dia. Tolerance	Yield Strength, psi	Hardness	Max. Hardness After Heat Treatment	Specifications Met		Each
2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
2 1/2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	0000
3"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	0000
3 1/2"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	0000
4"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
4 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
5"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
5 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
6"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
6 1/2"	0" to 0.125"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
7"	0" to 0.156"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
8"	0" to 0.156"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
9"	0" to 0.188"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
10"	0" to 0.25"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
1" Lg.
2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	0000
2 1/2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	0000
3"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
3 1/2"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
4"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
4 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
5"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
5 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
6"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
6 1/2"	0" to 0.125"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
7"	0" to 0.156"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
8"	0" to 0.156"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
9"	0" to 0.188"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
10"	0" to 0.25"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	00000
3" Lg.
2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
2 1/2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
3"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
3 1/2"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
4"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
4 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
5"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
5 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
6"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	000000
6 1/2"	0" to 0.125"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	000000
7"	0" to 0.156"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	000000
8"	0" to 0.156"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	000000
9"	0" to 0.188"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	000000
10"	0" to 0.25"	36,000	Rockwell B80 (Medium)	Not Rated	__	00000000	000000
6" Lg.
2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
2 1/2"	-0.003" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
3"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
3 1/2"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	00000
4"	-0.004" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	00000
4 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	000000
5"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	000000
5 1/2"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Not Rated	__	00000000	000000
6"	-0.005" to 0"	54,000	Rockwell B70 (Medium)	Rockwell C60	ASTM A108	0000000	000000

High-Strength 1045 Carbon Steel Rods and Discs

Stronger than low-carbon steel with equally good machinability, 1045 carbon steel is widely used for bolts, studs, and shafts.

Ground rods are decarb-free for a uniform surface that will consistently accept heat treating.

If you don't see the size you're looking for, please specify a length under additional rod lengths.

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

Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.

Rods and Discs

Yield Strength:
Inch sizes: 77,000 psi
Metric sizes: 65,000 psi
Hardness:
Inch sizes: Rockwell B90 (Medium)
Metric sizes: Rockwell B80 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated
Specifications Met:
Inch sizes: ASTM A108
Metric sizes: ASTM A108, ASTM A29, ASTM A576

Dia.	Dia. Tolerance	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1/4"	-0.006" to 0"	1/8"	0000000	00	00000	00000
3/8"	-0.006" to 0"	1/8"	0000000	00	0000	0000
1/2"	-0.006" to 0"	1/8"	0000000	00	0000	00000
5/8"	-0.006" to 0"	1/8"	00000000	00	0000	00000
3/4"	-0.006" to 0"	1/8"	00000000	00	00000	00000
7/8"	-0.006" to 0"	1/8"	0000000	00000	00000	00000
1"	-0.006" to 0"	1/8"	000000	00000	00000	00000
1 1/8"	-0.006" to 0"	1/8"	000000	00000	00000	00000
1 1/4"	-0.006" to 0"	1/8"	000000	00000	00000	00000
1 3/8"	-0.006" to 0"	1/8"	000000	00000	00000	00000
1 1/2"	-0.006" to 0"	1/8"	000000	00000	00000	00000
1 5/8"	-0.006" to 0"	1/8"	000000	00000	00000	00000
1 3/4"	-0.006" to 0"	1/8"	0000000	00000	00000	000000
1 7/8"	-0.006" to 0"	1/8"	0000000	00000	00000	000000
2"	-0.006" to 0"	1/8"	0000000	00000	00000	000000
2 1/8"	-0.006" to 0"	1/8"	0000000	00000	00000	000000
2 1/4"	-0.006" to 0"	1/8"	0000000	00000	00000	000000
2 3/8"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
2 1/2"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
2 5/8"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
2 3/4"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
2 7/8"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
3"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
3 1/8"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
3 1/4"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
3 1/2"	-0.006" to 0"	1/8"	0000000	00000	000000	000000
3 5/8"	-0.006" to 0"	1/8"	0000000	000000	000000	000000
3 3/4"	-0.006" to 0"	1/8"	0000000	000000	000000	000000
4"	-0.006" to 0"	1/8"	0000000	000000	000000	000000

1/2" Lg.
Dia.	Dia. Tolerance		Each
4"	-0.006" to 0"	0000000	000000
5"	-0.006" to 0"	0000000	00000
6"	-0.006" to 0"	0000000	00000
1" Lg.
2"	-0.006" to 0"	00000000	0000
3"	-0.006" to 0"	00000000	00000
4"	-0.006" to 0"	00000000	00000
5"	-0.006" to 0"	00000000	00000
6"	-0.006" to 0"	00000000	00000
3" Lg.
2"	-0.006" to 0"	00000000	00000
3"	-0.006" to 0"	00000000	00000
4"	-0.006" to 0"	00000000	00000
5"	-0.006" to 0"	00000000	00000
6"	-0.006" to 0"	00000000	00000
6" Lg.
2"	-0.006" to 0"	00000000	00000
3"	-0.006" to 0"	00000000	00000
4"	-0.006" to 0"	00000000	00000
5"	-0.006" to 0"	00000000	000000
6"	-0.006" to 0"	00000000	000000
9" Lg.
2"	-0.006" to 0"	00000000	00000
3"	-0.006" to 0"	00000000	00000
4"	-0.006" to 0"	00000000	000000
5"	-0.006" to 0"	00000000	000000
6"	-0.006" to 0"	00000000	000000

Dia., mm	Dia. Tolerance, mm	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
6	-0.013 to 0	1/8" per 10 ft.	0000000	00000	000000	000000
8	-0.013 to 0	1/8" per 10 ft.	0000000	00000	00000	00000
10	-0.013 to 0	1/8" per 10 ft.	0000000	0000	00000	00000
12	-0.013 to 0	1/8" per 10 ft.	0000000	00000	00000	00000
15	-0.013 to 0	1/8" per 10 ft.	0000000	00000	00000	00000
20	-0.013 to 0	1/16" per 10 ft.	0000000	00000	00000	00000
25	-0.013 to 0	1/16" per 10 ft.	0000000	00000	00000	000000
30	-0.013 to 0	1/4" per 5 ft.	0000000	00000	00000	000000

Ground Rods

Yield Strength: 65,000 psi
Hardness: Rockwell B85 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C62
Specifications Met: ASTM A108

Dia.	Dia. Tolerance	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1/8"	-0.001" to 0"	1/8" per 5 ft.	0000000	00000	000000	000000
3/16"	-0.001" to 0"	1/8" per 5 ft.	0000000	0000	00000	00000
1/4"	-0.001" to 0"	1/8" per 5 ft.	0000000	0000	00000	00000
5/16"	-0.001" to 0"	1/8" per 5 ft.	0000000	0000	00000	00000
3/8"	-0.001" to 0"	1/8" per 5 ft.	0000000	00000	00000	00000
1/2"	-0.001" to 0"	1/16" per 5 ft.	0000000	00000	00000	00000
5/8"	-0.001" to 0"	1/16" per 5 ft.	0000000	00000	00000	00000
3/4"	-0.001" to 0"	1/16" per 5 ft.	0000000	00000	00000	00000
7/8"	-0.001" to 0"	1/16" per 5 ft.	0000000	00000	00000	00000
1"	-0.002" to 0"	1/16" per 5 ft.	0000000	00000	00000	00000
1 1/4"	-0.002" to 0"	1/16" per 5 ft.	0000000	00000	00000	000000
1 1/2"	-0.002" to 0"	1/16" per 5 ft.	0000000	00000	000000	000000
1 3/4"	-0.002" to 0"	1/16" per 5 ft.	0000000	00000	000000	000000
2"	-0.002" to 0"	1/16" per 5 ft.	0000000	00000	000000	000000
2 3/16"	-0.002" to 0"	1/16" per 5 ft.	0000000	00000	000000	000000
2 1/2"	-0.002" to 0"	1/16" per 5 ft.	0000000	00000	000000	000000
2 3/4"	-0.002" to 0"	1/16" per 5 ft.	0000000	000000	000000	000000
3"	-0.002" to 0"	1/16" per 5 ft.	0000000	000000	000000	000000

Additional Rod Lengths

Yield Strength: 77,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Specifications Met: ASTM A108, ASTM A29

To Order: Please specify length in increments of 0.25" within the range listed.

Dia.	Dia. Tolerance	Straightness Tolerance	Choose a Length		Per Inch
1/4"	-0.003" to 0"	1/8"	13"-90"	0000000	00000
3/8"	-0.003" to 0"	1/8"	13"-90"	0000000	000
1/2"	-0.003" to 0"	1/8"	13"-90"	0000000	000
5/8"	-0.003" to 0"	1/8"	13"-90"	0000000	000
3/4"	-0.003" to 0"	1/8"	13"-90"	0000000	0000
7/8"	-0.003" to 0"	1/8"	13"-90"	0000000	0000
1"	-0.003" to 0"	1/8"	13"-90"	0000000	0000
1 1/4"	-0.003" to 0"	1/8"	13"-90"	0000000	0000
1 3/8"	-0.003" to 0"	1/8"	13"-90"	0000000	0000
1 1/2"	-0.003" to 0"	1/8"	13"-90"	0000000	0000
1 5/8"	-0.004" to 0"	1/8"	13"-90"	0000000	0000
1 3/4"	-0.004" to 0"	1/8"	13"-90"	0000000	0000
1 7/8"	-0.004" to 0"	1/8"	13"-90"	0000000	0000
2"	-0.004" to 0"	1/8"	13"-90"	0000000	0000
2 1/4"	-0.004" to 0"	1/8"	13"-90"	0000000	0000
2 3/8"	-0.004" to 0"	1/8"	13"-90"	0000000	0000
2 1/2"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
2 5/8"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
2 3/4"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
2 7/8"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
3"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
3 1/8"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
3 1/4"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
3 1/2"	-0.005" to 0"	1/8"	13"-90"	0000000	0000
3 3/4"	-0.005" to 0"	1/8"	13"-90"	0000000	00000
4"	-0.005" to 0"	1/8"	13"-90"	0000000	00000
4 1/4"	-0.006" to 0"	1/8"	13"-90"	0000000	00000
4 1/2"	-0.006" to 0"	1/8"	13"-90"	0000000	00000
4 3/4"	-0.006" to 0"	1/8"	13"-90"	0000000	00000
5"	-0.006" to 0"	1/8"	13"-90"	0000000	00000
5 1/4"	-0.006" to 0"	1/8"	13"-90"	0000000	00000
5 1/2"	-0.006" to 0"	1/8"	13"-90"	0000000	00000
5 3/4"	-0.006" to 0"	1/8"	13"-90"	0000000	00000
6"	-0.006" to 0"	1/8"	13"-90"	0000000	00000

Shims for Keyed Shafts

Precisely shaped to fit snugly on keyed shafts, these shims align, level, and space components. Because of their tight fit, they also help components rotate in unison with the shaft.

Shims with a tab only fit without a key—the tab sits inside the keyway on the keyed shaft.

Carbon steel shims are stronger than stainless steel shims, but shouldn’t be used in wet environments.

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

With Tab—1008-1010 Carbon Steel

Carbon Steel Shim with Tab

					Tab
For Shaft Dia.	ID	ID Tolerance	OD	OD Tolerance	Wd.	Dp.	Minimum Hardness	Magnetic Properties	Pkg. Qty.		Pkg.
0.005" Thick. (-0.0005" to 0.0005" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.01" Thick. (-0.00075" to 0.00075" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.015" Thick. (-0.001" to 0.001" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.02" Thick. (-0.001" to 0.001" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.031" Thick. (-0.0015" to 0.0015" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.062" Thick. (-0.0025" to 0.0025" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	5	00000000	0000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
1/8" Thick. (-0.003" to 0.003" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	5	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	5	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	1	00000000	0000

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Low-Carbon Steel Rods and Discs

High-Strength 1045 Carbon Steel Rods and Discs

Shims for Keyed Shafts