About Aluminum
More
About Copper, Brass, and Bronze
More
About Stainless Steel
More
About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron
More
Hardened Bearing-Quality 440C Stainless Steel

- Yield Strength: Not Rated
- Hardness: Rockwell C60 (Very Hard)
- Heat Treatment: Hardened
- Specifications Met: SAE AMS5630
These balls are hardened for increased wear and abrasion resistance. 440C is one of the hardest types of stainless steel after heat treating. It's often used for bearings and valves. This material maintains its corrosion resistance in temperatures up to 800° F.
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 ORDER HISTORY after your order ships.
Dia. | Dia. Tolerance | Magnetic Properties | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
---|---|---|---|---|---|
5/64" | -0.0005" to 0.0005" | Magnetic | 100 | 0000000 | 00000 |
Tight-Tolerance Hardened 440C Stainless Steel
With a diameter that’s held to a close tolerance, this material is hardened for increased wear and abrasion resistance. 440C is one of the hardest types of stainless steel after heat treating. This material maintains its corrosion resistance in temperatures up to 800° F.
Balls have a reflective, mirror-like appearance.
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 ORDER HISTORY after your order ships.

- Yield Strength: Not Rated
- Hardness: Rockwell C60 (Very Hard)
- Heat Treatment: Hardened
- Specifications Met: SAE AMS5630
Dia. | Dia. Tolerance | Magnetic Properties | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
---|---|---|---|---|---|
5/64" | -0.0001" to 0.0001" | Magnetic | 50 | 0000000 | 00000 |
Hard Wear-Resistant 52100 Alloy Steel Balls

- Yield Strength: 295,000 psi
- Hardness: Rockwell C60 (Very Hard)
- Specifications Met: See table
Also known as chrome steel, 52100 is an extremely hard and wear-resistant material. These balls are often used in bearings.
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 ORDER HISTORY after your order ships.
Dia. | Dia. Tolerance | Heat Treatment | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
---|---|---|---|---|---|
5/64" | -0.0001" to 0.0001" | Hardened | 100 | 00000000 | 000000 |
Ultra-Hard C2 Tungsten Carbide Balls

- Yield Strength: Not Rated
- Hardness: Rockwell C75 (Very Hard)
- Temper Rating: Not Rated
Tungsten carbide, sometimes called carbide, is harder than Corrosion-Resistant Tungsten with excellent wear resistance. Use it to machine long-lasting tools, such as end mills and inserts.
For technical drawings and 3-D models, click on a part number.
Dia. | Dia. Tolerance | Mechanical Finish | Pkg. Qty. | Pkg. | |
5/64" | -0.0001" to 0.0001" | Polished | 5 | 0000000 | 000000 |
Super-Conductive 102 Copper Balls

- Yield Strength: Not Rated
- Hardness: Not Rated
- Temper: H04 (Full Hard)
- Heat Treatable: No
- Specifications Met: ASTM B2, ASTM B3
With 99.95% copper content, 102 copper has higher purity than 110 copper, resulting in superior electrical conductivity. It's commonly called OFE and OFHC copper. Use it in electrical applications, such as for coaxial cables and terminal lug.
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 ORDER HISTORY after your order ships.
Dia. | Dia. Tolerance | Mechanical Finish | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
---|---|---|---|---|---|
5/64" | -0.001" to 0.001" | Tumbled | 100 | 00000000 | 000000 |
2017 Aluminum

- Yield Strength: 32,000 psi
- Hardness: Brinell 110 (Soft)
- Temper: T4
Widely used as bearings and in valves, these 2017 aluminum balls are durable and lightweight.
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 ORDER HISTORY after your order ships.
Dia. | Dia. Tolerance | Heat Treatment | Pkg. Qty. | Pkg. | |
5/64" | -0.001" to 0.001" | Hardened | 100 | 00000000 | 000000 |