Polyethylene Balls | McMaster-Carr

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Material

Diameter

Shape

Performance

Electrically Insulating

For Use With

Acetic Acid (White Vinegar)

Methanol (Methyl Alcohol)

Density

Hardness Rating

Color

System of Measurement

Inch

Relative Friction Rating

Tolerance Rating

Application

Hardness

Rockwell R40 to Rockwell R80

Water Absorption Rating

Excellent

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Minimum Temperature

Maximum Temperature

Impact Strength

1.1 ft·lbf/in to 1.94 ft·lbf/in

Impact Strength Rating

Poor

Tensile Strength Rating

Poor

Dielectric Strength

450 V/mil to 510 V/mil

Not Rated

Electrical Insulation Rating

Thermal Stability

14 Products

Moisture-Resistant Polyethylene (HDPE) Balls

Color: Semi-Clear White
Temperature Range: Not Rated
Tensile Strength: 3,920-4,200 psi (Poor)
Impact Strength: 1.1-1.94 ft.-lbs./in. (Poor)
Hardness: Rockwell R40-R80 (Medium)
For Use Outdoors: No

Often used in check valves, relief valves, and float valves, these balls won’t swell when exposed to water. HDPE offers good chemical resistance.

Dia.	Dia. Tolerance	Pkg. Qty.		Pkg.
1/8"	-0.002" to 0.002"	250	0000000	00000
1/4"	-0.002" to 0.002"	250	0000000	00000
3/8"	-0.002" to 0.002"	100	0000000	00000
7/16"	-0.002" to 0.002"	100	0000000	00000
1/2"	-0.002" to 0.002"	50	0000000	00000
9/16"	-0.002" to 0.002"	25	0000000	0000

Moisture-Resistant Plastic Pellets

These pellets resist swelling when exposed to water, making them suitable for use in wet environments. Melt and mold them into desired shapes. Pellets are made from virgin resins and are compatible with various types of molding equipment such as injection molders and 3D printers.

Choose HDPE pellets for general-purpose applications such as protoyping.

Container
Type	Net Weight, lbs.	Molding Temperature, °F	Melting Temperature, °F	Melt Flow Rate	Shrinkage	Hardness	Impact Strength	Tensile Strength	Clarity	Specifications Met		Each
HDPE Plastic
White
Pail	5	80° to 140°	375° to 440°	6 g/10 min	1.2%-2%	Shore D62 (Medium)	1 ft.-lbs./in. (Poor)	4,100 psi (Poor)	Opaque	FDA Compliant 21 CFR 177.1520	0000000	0000000
Cardboard Box	50	80° to 140°	375° to 440°	6 g/10 min	1.2%-2%	Shore D62 (Medium)	1 ft.-lbs./in. (Poor)	4,100 psi (Poor)	Opaque	FDA Compliant 21 CFR 177.1520	0000000	000000

Floats for Chemicals

Made of polyethylene, these floats can be used with chemicals, salts, and caustic fluids.

Ball floats are self-tapping when used with a threaded rod.

Polyethylene Plastic Rectangular Floats

Rectangular

Lg.	Wd.	Ht.	Thread Size	Thread Type	Gender	Max. Pressure	Temp. Range, °F	Color	For Container Type		Each
3 3/4"	2 1/2"	1 7/16"	8-32	UNC	Female	Not Rated	35° to 140°	Off-White	Open Tank	0000000	00000

Polyethylene Plastic Ball Floats

Dia.	Thread Size	Thread Type	Gender	Max. Pressure	Temp. Range, °F	Color	Features	For Container Type		Each
6"	1/4"-20	UNC	Female	Not Rated	35° to 140°	Black	UV Resistant	Open Tank	0000000	000000
6"	5/16"-18	UNC	Female	Not Rated	35° to 140°	Black	UV Resistant	Open Tank	0000000	00000
8"	1/4"-20	UNC	Female	Not Rated	35° to 140°	Black	UV Resistant	Open Tank	0000000	00000
8"	5/16"-18	UNC	Female	Not Rated	35° to 140°	Black	UV Resistant	Open Tank	0000000	00000
8"	3/8"-16	UNC	Female	Not Rated	35° to 140°	Black	UV Resistant	Open Tank	0000000	00000