Proteus Beads | McMaster-Carr

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System of Measurement

Diameter

Shape

Material

Density

For Use With

Acetic Acid (White Vinegar)

Methanol (Methyl Alcohol)

Methyl Ethyl Ketone (MEK)

Mineral Oil

Phosphoric Acid

Sodium Hydroxide (Caustic Soda)

Color

Construction

Hardness Rating

Dielectric Strength

For Use Outdoors

Minimum Temperature

Application

Hardness

Clarity

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

Yes

Impact Strength

0.9 ft·lbf/in

Tensile Strength

2,900 psi to 5,070 psi

Water Absorption

0.2%

Specifications Met

ASTM D4101

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

DFARS Specialty Metals

RoHS

Tolerance Rating

22 Products

About Plastic

Compare over 25 types of plastic to find the right material for you.

Plastic Balls

Polypropylene—Resistant to swelling when exposed to water, these balls are often used in laboratory applications.

	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color	Pkg. Qty.		Pkg.
Multipurpose







	Polypropylene

	1/8"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	500	1974K2	00000


	5/32"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	500	1974K4	0000
	3/16"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	500	1974K5	0000
	7/32"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	250	1974K8	0000
	1/4"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	250	1974K13	0000
	9/32"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	100	1974K7	0000
	5/16"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	250	1974K16	00000
	3/8"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	100	1974K17	0000
	0.4"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	15	1974K31	0000
	1/2"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	100	1974K19	00000
	5/8"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	50	1974K21	0000


	3/4"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	25	1974K22	0000
	7/8"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	1	1974K23	0000
	1"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	10	1974K24	0000
	1.497"	-0.002" to 0.002"	Not Rated	180	2,900 to 5,070	0.9	Semi-Clear White	3	1974K33	0000

Hollow Plastic Balls

Hollow balls float. Use them in tanks to slow evaporation and reduce heat loss.

Polypropylene—Resistant to swelling when exposed to water, these balls are often used in laboratory applications.

	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color	Food Industry Std.	Pkg. Qty.		Pkg.
Multipurpose







	Polypropylene

	0.787"	-0.010" to 0.010"	Not Rated	220	2,900 to 5,070	0.9	Semi-Clear White	FDA Standard	150	3748K31	000000


	1"	-0.015" to 0.015"	Not Rated	220	2,900 to 5,070	0.9	Semi-Clear White	FDA Standard	25	9338K11	0000
	1.4"	-0.015" to 0.015"	Not Rated	220	2,900 to 5,070	0.9	Semi-Clear White	FDA Standard	25	9338K13	0000
	1.496"	-0.010" to 0.010"	Not Rated	220	2,900 to 5,070	0.9	Semi-Clear White	FDA Standard	50	3748K33	00000
	1.969"	-0.020" to 0.020"	Not Rated	220	2,900 to 5,070	0.9	Semi-Clear White	FDA Standard	40	3748K34	00000
	3.15"	-0.030" to 0.030"	Not Rated	220	2,900 to 5,070	0.9	Semi-Clear White	FDA Standard	10	3748K36	00000
	3.937"	-0.050" to 0.050"	Not Rated	220	2,900 to 5,070	0.9	Semi-Clear White	FDA Standard	1	3748K18	0000