Metric Balls | McMaster-Carr

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System of Measurement

Diameter

Material

Shape

Tolerance Rating

Hardness Rating

Hardness

Rockwell R108 to Rockwell R121

Rockwell R120 to Rockwell R122

Performance

Thread Size

Appearance

Mount Type

Heat Treatment

Maximum Temperature

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Certificate Type

Material Certificate with Traceable Lot Number

Length

Yield Strength

RoHS

REACH

Minimum Temperature

Construction

Export Control Classification Number (ECCN)

Ball Diameter

DFARS Specialty Metals

Magnetic Properties

Precision Ball Grade

212 Products

Raw Materials

Stainless Steel

Resists corrosion and chemicals in most environments—all with material certificates for traceability

36 products

Steel

Strong, machinable, and weldable—all with material certificates for traceability

61 products

Tungsten

Our densest metal resists wear and heat to make end mills, heat shields, electrodes, and more

13 products

Aluminum

Lightweight, easy to machine, and corrosion resistant—all with material certificates for traceability

3 products

Titanium

The most corrosion-resistant metal we offer—all with material certificates for traceability

2 products

Ceramic

Hard and wear resistant, it also withstands corrosion and high temperatures

13 products

Plastic

A lightweight alternative to metal and glass

9 products

Material Handling

Ball Transfers

Install in arrays to create platforms for conveying, rotating, and positioning heavy objects

24 products

Fabricating and Machining

Tooling Balls

Create a physical reference point for aligning workpieces in fixturing

4 products

Tumbling Media

Use in tumblers to polish, finish, deburr, clean, or round the edges of metal parts

5 products

Building and Machinery Hardware

Ball Knobs

Provide grip on control levers and push-pull rods

41 products

Measuring and Inspecting

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

1 product