4mm Balls | McMaster-Carr

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System of Measurement

Diameter

Material

Delrin® Acetal

Stainless Steel

Tungsten Carbide

Shape

Tolerance Rating

Hardness Rating

Hardness

Rockwell R120 to Rockwell R122

Rockwell 45N 81

Rockwell 45N 83

Magnetic Properties

Appearance

Performance

Bearing Quality

Chemical Resistant

Corrosion Resistant

Electrically Insulating

Fracture Resistant

High Temperature

Highly Absorbent

Highly Weldable

Moisture Resistant

Thermally Stable

Heat Treatment

Yield Strength

Maximum Temperature

Less than 250° F

500° F to 999° F

1,000° F to 1,999° F

2,000° F or greater

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

Certificate Type

Material Certificate with Traceable Lot Number

Minimum Temperature

-249° F to -1° F

REACH

RoHS

DFARS Specialty Metals

Export Control Classification Number (ECCN)

Mechanical Finish

Elongation

Construction

Specifications Met

Fabrication

Precision Ball Grade

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10 Products

Raw Materials

Stainless Steel

Stainless Steel

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

Steel

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

Plastic

A lightweight alternative to metal and glass

Tungsten

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

Ceramic

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

Fabricating and Machining

Tumbling Media

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)