Metric Metal Balls | McMaster-Carr

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74 Products

Steel Balls

Wear-Resistant 52100 Alloy Steel—High carbon and chromium content makes this 52100 alloy steel extremely hard and resistant to wear. It’s also known as chrome steel. Often used as bearings, these balls are hardened for increased abrasion and impact resistance.

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

	Dia. Tolerance, mm	Heat Treatment	Yield Strength, psi	Hardness	Appearance	Pkg. Qty.		Pkg.
Wear-Resistant 52100 Alloy Steel



	1	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K29	00000


	1.5	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K42	0000
	2	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K31	0000
	2.5	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K32	0000
	3	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K33	0000
	3.5	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K35	0000
	4	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K37	0000
	4.5	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	50	9292K38	0000
	5	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	100	9292K39	0000
	5.5	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	50	9292K74	0000
	6	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	50	9292K41	0000


	6.5	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	50	9292K76	0000
	7	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	50	9292K43	0000
	8	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	25	9292K45	0000
	9	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	20	9292K44	0000
	10	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	20	9292K47	0000
	12	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	10	9292K49	0000
	13	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	5	9292K46	0000
	14	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	5	9292K51	0000
	15	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	5	9292K52	0000
	16	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	5	9292K53	0000


	18	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	3	9292K55	0000
	24	-0.0025 to 0.0025	Hardened	295,000	Rockwell C60 (Extra Hard)	Mirror Like	3	9292K56	00000

Extra-Hard C2 Tungsten Carbide

Machine long-lasting tools, such as end mills and inserts, with these rods. Tungsten carbide, sometimes called carbide, is harder than our Corrosion-Resistant Tungsten with excellent wear resistance. Its extreme hardness lets cutting edges stay sharp far longer than high-speed steel.

Balls

Dia. Tolerance, mm	Mechanical Finish	Yield Strength	Hardness	Temper Rating	Pkg. Qty.		Pkg.



1	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	5	9686K81	00000


2	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	5	9686K82	00000
3	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	5	9686K83	00000
4	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	2	9686K85	00000
5	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	2	9686K86	00000
6	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	2	9686K87	00000
7	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	2	9686K89	00000
8	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	2	9686K91	00000
10	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	1	9686K93	00000
12	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	1	9686K95	00000
13	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	1	9686K77	00000


14	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	1	9686K78	00000
15	-0.0025 to 0.0025	Polished	Not Rated	Rockwell C75 (Extra Hard)	Not Rated	1	9686K79	00000

Hardened Ultra-Wear-Resistant 440C Stainless Steel Balls

The best choice for high-performance bearings and valves, these 440C stainless steel balls are among the strongest, hardest, and most wear-resistant we offer. They’re passivated to wash away surface particles that cause rust, and they’re polished to a mirror-like finish that contaminants can’t stick to. The result is balls that stay smooth and stand the test of time—even at temperatures up to 800° F. They’re made to strict ISO 3290 standards for roundness and surface quality.

These balls are magnetic, so you can use them in separators, sensors, and automated handling systems that use magnetic pickup or positioning.

Grade 25—Precision-ground to tighter tolerances than Grade 100 balls. Use them in high-accuracy assemblies.

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

							Stainless Steel Balls
	Dia., mm	Dia. Tolerance, mm	Hardness	Specs. Met	Magnetic Properties	Appearance	Pkg. Qty.		Pkg.
Grade 25



		1	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	250	1598K16	00000


		1.5	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	250	1598K17	0000
		2	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	250	1598K18	0000
		2.5	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	250	1598K22	00000
		3	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	250	1598K23	00000
		3.5	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	100	1598K24	00000
		4	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	50	1598K25	0000
		5	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	50	1598K26	0000
		6	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	50	1598K27	00000
		7	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	25	1598K28	00000
		8	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	25	1598K29	00000


		10	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	10	1598K32	00000
		12	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	10	1598K33	00000
		13	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	5	1598K34	00000
		14	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	5	1598K35	00000
		15	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	5	1598K36	00000
		16	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	3	1598K37	00000
		18	-0.0025 to 0.0025	Rockwell C58 (Extra Hard)	ISO 3290	Magnetic	Mirror Like	3	1598K38	00000

Highly Corrosion-Resistant 316 Stainless Steel Round Tubes

Fabricate frames, machine enclosures, railing bases, and other components that hold up in highly corrosive environments. One of the most corrosion-resistant types of stainless steel, 316 stands up to the harshest chemicals, including bleach, chlorine, and phosphoric acid. It’s similar in strength and temperature resistance to 304 but is better suited for demanding marine and chemical-processing environments. Use these tubes for structural and ornamental applications that require strength, rigidity, and aesthetics. They should not be used for pressure containment and fluid handling. Compared to rectangular tubing, they resist twisting better and bend more uniformly.

These tubes maintain corrosion resistance in temperatures up to 1500° F.

316/316L Stainless Steel—Dual certified to meet both 316 and 316L requirements. The low carbon content makes this stainless steel easy to weld while maintaining strength and corrosion resistance.

Seamless—Stronger than welded shapes. They have a smooth, uninterrupted surface without stress points from seams. They’re also easy to clean.

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

	OD Tolerance	ID	Material	Fabrication	Hardness	Specs. Met		1/2 ft. Long	1 ft. Long	2 ft. Long	4 ft. Long
0.188" Thick Wall (7 ga.)



	3/4"	-0.005" to 0.005"	0.374"	316/316L Stainless Steel	Seamless	Rockwell B80 (Medium)	ASTM A213, ASTM A269, ASTM A511	89495K412	000000	000000	000000	0000000


	1"	-0.005" to 0.005"	0.624"	316/316L Stainless Steel	Seamless	Rockwell B80 (Medium)	ASTM A213, ASTM A269, ASTM A511	89495K422	00000	00000	000000	000000


	1/4" Thick Wall



			1"	-0.005" to 0.005"	1/2"	316/316L Stainless Steel	Seamless	Rockwell B80 (Medium)	ASTM A213, ASTM A269, ASTM A511	89495K432	00000	000000	000000	000000


			1/2" Thick Wall



					1 1/2"	-0.010" to 0.010"	1/2"	316/316L Stainless Steel	Seamless	Rockwell B80 (Medium)	ASTM A213, ASTM A269, ASTM A511	89495K442	000000	000000	000000	000000

Highly Corrosion-Resistant 316 Stainless Steel Balls

Trusted in marine and chemical-processing valves, these balls stand up to some of the most highly corrosive environments. Made of 316 stainless steel, they hold up to sulfuric acid, chlorine, and other harsh chemicals in temperatures as high as 1500° F. They’re a step up from balls made of 304, which have similar strength and temperature performance. They’re passivated to wash away surface particles that cause rust, and they’re polished to a mirror-like finish that contaminants can’t stick to. The result is balls that stay smooth and stand the test of time. They’re made to strict ISO 3290 standards for roundness and surface quality.

Although 316 balls aren’t as wear resistant as 440C balls, they’re easier to fabricate. They’re also nonmagnetic.

Grade 100—Great for mechanical applications where you don’t need the exacting tolerances of Grade 25.

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

								Stainless Steel Balls
	Dia., mm	Dia. Tolerance, mm	Mechanical Finish	Hardness	Specs. Met	Magnetic Properties	Appearance	Pkg. Qty.		Pkg.
Grade 100



		2.5	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	250	96415K265	00000


		3	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	250	96415K54	0000
		3.5	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	100	96415K541	0000
		4	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	50	96415K57	0000
		5	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	50	96415K581	0000
		6	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	50	96415K588	0000
		7	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	25	96415K637	0000
		8	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	25	96415K773	00000
		10	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	10	96415K777	00000
		12	-0.013 to 0.013	Tumbled	Rockwell C25 (Hard)	ISO 3290	Nonmagnetic	Mirror Like	10	96415K938	00000

Multipurpose 304 Stainless Steel Balls

Whether inside pumps or furnace parts, these balls can be used in any mildly corrosive, high-temperature conditions. Made of 304 stainless steel, they won’t degrade when exposed to mild chemicals and water, even at temperatures up to 1500° F. They’re passivated to wash away surface particles that cause rust, and they’re polished to a mirror-like finish that contaminants can’t stick to. The result is balls that stay smooth and stand the test of time. These balls are made to strict ISO 3290 standards for roundness and surface quality.

Although 304 balls aren’t as wear resistant as 440C balls, they’re easier to fabricate. They’re also nonmagnetic.

Grade 100—Great for mechanical applications where you don’t need the exacting tolerances of Grade 25.

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

								Stainless Steel Balls
	Dia., mm	Dia. Tolerance, mm	Fabrication	Hardness	Specs. Met	Magnetic Properties	Appearance	Pkg. Qty.		Pkg.
Grade 100



		3	-0.0127 to 0.0127	Cold Worked	Rockwell C25 (Hard)	ASTM A240, ISO 3290, SAE J405	Nonmagnetic	Mirror Like	250	9291K73	00000


		4	-0.0127 to 0.0127	Cold Worked	Rockwell C25 (Hard)	ASTM A240, ISO 3290, SAE J405	Nonmagnetic	Mirror Like	50	9291K75	0000
		5	-0.0127 to 0.0127	Cold Worked	Rockwell C25 (Hard)	ASTM A240, ISO 3290, SAE J405	Nonmagnetic	Mirror Like	50	9291K76	0000
		6	-0.0127 to 0.0127	Cold Worked	Rockwell C25 (Hard)	ASTM A240, ISO 3290, SAE J405	Nonmagnetic	Mirror Like	50	9291K77	0000
		8	-0.0127 to 0.0127	Cold Worked	Rockwell C25 (Hard)	ASTM A240, ISO 3290, SAE J405	Nonmagnetic	Mirror Like	25	9291K79	00000
		10	-0.0127 to 0.0127	Cold Worked	Rockwell C25 (Hard)	ASTM A240, ISO 3290, SAE J405	Nonmagnetic	Mirror Like	10	9291K81	0000