Ball Floats | McMaster-Carr

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Highly Corrosion Resistant

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132 Products

Floats for Threaded Rods

Connect these floats to threaded float rods (not included). Use them to replace an existing float or combine with rods and float valve bodies (not included) to build a float valve.

Polypropylene Ball Floats

Polypropylene floats are lightweight and meet NSF/ANSI 61 standards for safe use with drinking water.

Dia.	Thread Size	Pipe Size	Thread Type	Gender	Max. Pressure	Temp. Range, ° F	Color	Features	For Container Type	Food Industry Std.		Each
5"	1/4"-20	—	UNC	Female	Not Rated	35 to 175	Black	UV Resistant	Open Tank	NSF/ANSI 61	9775K14	000000
6"	1/4"-20	—	UNC	Female	Not Rated	35 to 175	Black	UV Resistant	Open Tank	NSF/ANSI 61	9775K16	00000
6"	5/16"-18	—	UNC	Female	Not Rated	35 to 175	Black	UV Resistant	Open Tank	NSF/ANSI 61	9775K51	00000
8"	—	3/8	NPT	Female	Not Rated	35 to 175	Black	UV Resistant	Open Tank	NSF/ANSI 61	9775K18	00000
8"	1/4"-20	—	UNC	Female	Not Rated	35 to 175	Black	UV Resistant	Open Tank	NSF/ANSI 61	9775K52	00000
8"	5/16"-18	—	UNC	Female	Not Rated	35 to 175	Black	UV Resistant	Open Tank	NSF/ANSI 61	9775K54	00000
8"	3/8"-16	—	UNC	Female	Not Rated	35 to 175	Black	UV Resistant	Open Tank	NSF/ANSI 61	9775K53	00000

304 Stainless Steel Ball Floats

Stainless steel floats have excellent corrosion resistance and are also for use with oil.

Dia.	Thread Size	Pipe Size	Thread Type	Gender	Max. Pressure, psi	Temp. Range, ° F	Ga.	For Container Type		Each
2"	8-32	—	UNC	Female	750	-30 to 225	25	Open Tank, Closed Tank	2817K11	000000
2"	1/4"-20	—	UNC	Female	750	-30 to 225	25	Open Tank, Closed Tank	2817K12	00000
2 1/2"	1/4"-20	—	UNC	Female	375	-30 to 225	24	Open Tank, Closed Tank	2817K13	00000
2 3/4"	1/4"-20	—	UNC	Female	250	-30 to 225	26	Open Tank, Closed Tank	2817K14	00000
3"	1/4"-20	—	UNC	Female	150	-30 to 225	26	Open Tank, Closed Tank	2817K15	00000
3"	1/4"-20	—	UNC	Female	750	-30 to 225	21	Open Tank, Closed Tank	2817K16	00000
3 1/4"	1/4"-20	—	UNC	Female	250	-30 to 225	24	Open Tank, Closed Tank	2817K17	00000
3 1/2"	—	1/8	NPT	Female	250	-30 to 225	24	Open Tank, Closed Tank	2817K18	00000
3 1/2"	—	1/8	NPT	Female	750	-30 to 225	21	Open Tank, Closed Tank	2817K19	00000
4"	—	1/8	NPT	Female	112	-30 to 225	24	Open Tank, Closed Tank	2817K21	00000
4"	—	1/8	NPT	Female	750	-30 to 225	20	Open Tank, Closed Tank	2817K22	00000
5"	—	1/4	NPT	Female	675	-30 to 225	19	Open Tank, Closed Tank	2817K25	00000
5"	1/4"-20	—	UNC	Female	337	-30 to 225	20	Open Tank, Closed Tank	2817K24	00000
6"	—	1/4	NPT	Female	300	-30 to 225	20	Open Tank, Closed Tank	2817K28	000000
6"	—	1/4	NPT	Female	450	-30 to 225	18	Open Tank, Closed Tank	2817K29	000000
6"	1/4"-20	—	UNC	Female	450	-30 to 225	18	Open Tank, Closed Tank	2817K27	000000
6"	3/8"-16	—	UNC	Female	300	-30 to 225	20	Open Tank, Closed Tank	2817K51	000000
7"	—	3/8	NPT	Female	250	-30 to 225	20	Open Tank, Closed Tank	2817K32	000000
7"	—	3/8	NPT	Female	350	-30 to 225	18	Open Tank, Closed Tank	2817K33	000000
8"	—	3/8	NPT	Female	175	-30 to 225	20	Open Tank, Closed Tank	2817K34	000000
8"	—	3/8	NPT	Female	275	-30 to 225	18	Open Tank, Closed Tank	2817K35	000000
10"	—	3/8	NPT	Female	200	-30 to 225	18	Open Tank, Closed Tank	2817K37	000000
10"	—	3/8	NPT	Female	300	-30 to 225	14	Open Tank, Closed Tank	2817K38	000000
12"	—	3/8	NPT	Female	250	-30 to 225	14	Open Tank, Closed Tank	2817K39	000000
14"	—	1/2	NPT	Female	160	-30 to 225	14	Open Tank, Closed Tank	2817K41	00000000

316 Stainless Steel Ball Floats

Stainless steel floats have excellent corrosion resistance and are also for use with oil.

Dia.	Thread Size	Pipe Size	Thread Type	Gender	Max. Pressure, psi	Temp. Range, ° F	Ga.	For Container Type		Each
2"	8-32	—	UNC	Female	750	-30 to 225	25	Open Tank, Closed Tank	2762K31	000000
2"	10-32	—	UNF	Female	210	35 to 210	24	Open Tank	2762K21	00000
2"	1/4"-20	—	UNC	Female	750	-30 to 225	25	Open Tank, Closed Tank	2762K32	00000
2 1/2"	1/4"-20	—	UNC	Female	375	-30 to 225	24	Open Tank, Closed Tank	2762K33	00000
3"	1/4"-20	—	UNC	Female	150	-30 to 225	26	Open Tank, Closed Tank	2762K35	00000
3"	1/4"-20	—	UNC	Female	750	-30 to 225	21	Open Tank, Closed Tank	2762K36	00000
3 1/4"	1/4"-20	—	UNC	Female	250	-30 to 225	24	Open Tank, Closed Tank	2762K37	00000
3 1/2"	—	1/8	NPT	Female	250	-30 to 225	24	Open Tank, Closed Tank	2762K38	00000
3 1/2"	—	1/8	NPT	Female	750	-30 to 225	21	Open Tank, Closed Tank	2762K39	00000
4"	—	1/8	NPT	Female	112	-30 to 225	24	Open Tank, Closed Tank	2762K41	000000
4"	—	1/8	NPT	Female	750	-30 to 225	20	Open Tank, Closed Tank	2762K42	00000
4"	1/4"-20	—	UNC	Female	175	35 to 210	22	Open Tank	2762K22	00000
4 1/2"	—	1/8	NPT	Female	562	-30 to 225	20	Open Tank, Closed Tank	2762K83	00000
5"	—	1/4	NPT	Female	675	-30 to 225	19	Open Tank, Closed Tank	2762K85	000000
5"	1/4"-20	—	UNC	Female	175	35 to 210	22	Open Tank	2762K23	000000
5"	1/4"-20	—	UNC	Female	275	-30 to 225	20	Open Tank, Closed Tank	2762K44	00000
6"	—	1/4	NPT	Female	300	-30 to 225	20	Open Tank, Closed Tank	2762K48	000000
6"	—	1/4	NPT	Female	450	-30 to 225	18	Open Tank, Closed Tank	2762K49	000000
6"	1/4"-20	—	UNC	Female	450	-30 to 225	18	Open Tank, Closed Tank	2762K47	000000
6"	3/8"-16	—	UNC	Female	300	-30 to 225	20	Open Tank, Closed Tank	2762K71	000000
7"	—	3/8	NPT	Female	250	-30 to 225	20	Open Tank, Closed Tank	2762K52	000000
7"	—	3/8	NPT	Female	350	-30 to 225	18	Open Tank, Closed Tank	2762K53	000000
8"	—	3/8	NPT	Female	175	-30 to 225	20	Open Tank, Closed Tank	2762K54	000000
8"	—	3/8	NPT	Female	275	-30 to 225	18	Open Tank, Closed Tank	2762K55	000000
8"	—	3/8	NPT	Female	425	-30 to 225	14	Open Tank, Closed Tank	2762K56	000000
9"	—	3/8	NPT	Female	250	-30 to 225	18	Open Tank, Closed Tank	2762K57	000000
10"	—	3/8	NPT	Female	175	35 to 210	18	Open Tank	2762K24	000000
10"	—	3/8	NPT	Female	300	-30 to 225	14	Open Tank, Closed Tank	2762K58	00000000
12"	—	3/8	NPT	Female	250	-30 to 225	14	Open Tank, Closed Tank	2762K59	00000000

Copper Ball Floats

Dia.	Thread Size	Pipe Size	Thread Type	Gender	Max. Pressure	Temp. Range, ° F	Ga.	For Container Type		Each
2"	1/4"-20	—	UNC	Female	Not Rated	35 to 180	24	Open Tank	2892K12	000000
2 1/2"	1/4"-20	—	UNC	Female	Not Rated	35 to 180	24	Open Tank	2892K14	00000
3"	1/4"-20	—	UNC	Female	Not Rated	35 to 180	24	Open Tank	2892K15	00000
4"	—	1/8	NPT	Female	Not Rated	35 to 180	23	Open Tank	2892K18	00000
4"	1/4"-20	—	UNC	Female	Not Rated	35 to 180	24	Open Tank	2892K17	00000
5"	—	1/4	NPT	Female	Not Rated	35 to 180	23	Open Tank	2892K22	00000
5"	1/4"-20	—	UNC	Female	Not Rated	35 to 180	24	Open Tank	2892K21	00000
6"	—	1/4	NPT	Female	Not Rated	35 to 180	23	Open Tank	2892K27	00000
6"	1/4"-20	—	UNC	Female	Not Rated	35 to 180	24	Open Tank	2892K24	00000
6"	3/8"-16	—	UNC	Female	Not Rated	35 to 180	23	Open Tank	2892K26	00000
7"	—	3/8	NPT	Female	Not Rated	35 to 180	21	Open Tank	2892K31	00000
8"	—	3/8	NPT	Female	Not Rated	35 to 180	21	Open Tank	2892K33	000000
8"	3/8"-16	—	UNC	Female	Not Rated	35 to 180	21	Open Tank	2892K32	000000
9"	—	3/8	NPT	Female	Not Rated	35 to 180	18	Open Tank	2892K34	000000
10"	—	3/8	NPT	Female	Not Rated	35 to 180	19	Open Tank	2892K36	000000
10"	3/8"-16	—	UNC	Female	Not Rated	35 to 180	18	Open Tank	2892K35	000000

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

Aluminum Balls

Lighter than steel and stronger than plastic, these balls save weight while standing up to wear and tear. They're widely used as grinding media and in valves and bearings.

3003 Aluminum—The best choice for high-speed bearings. These balls are hollow, so they're even lighter than solid aluminum balls to spin faster and generate less heat. However, they can't handle as heavy loads. They won't degrade outdoors or from mild chemicals.

	Dia. Tolerance	Construction	Temper Designation	Pkg. Qty.		Pkg.
3003 Aluminum



	1/4"	-0.010" to 0.010"	Hollow	O	10	1089T21	000000


	5/16"	-0.010" to 0.010"	Hollow	O	10	1089T22	00000
	3/8"	-0.010" to 0.010"	Hollow	O	10	1089T23	00000
	7/16"	-0.010" to 0.010"	Hollow	O	10	1089T24	00000
	1/2"	-0.010" to 0.010"	Hollow	O	10	1089T25	00000
	9/16"	-0.010" to 0.010"	Hollow	O	10	1089T26	00000
	5/8"	-0.010" to 0.010"	Hollow	O	10	1089T28	00000
	3/4"	-0.010" to 0.010"	Hollow	O	10	1089T27	00000

Through-Hole Floats

The through-hole connection allows these floats to slide up and down a vertical float rod (not included). Use clamps (not included) to set them in a fixed position.

304 Stainless Steel Ball Floats—For Water

Dia.	Through-Hole Dia.	Max. Pressure, psi	Temp. Range, ° F	Ga.	For Container Type		Each
2"	1/4"	300	-30 to 225	24	Open Tank	2832K11	000000

304 Stainless Steel Ball—For Water and Hydraulic Fluid

Dia.	Through-Hole Dia.	Max. Pressure, psi	Temp. Range, ° F	Ga.	For Container Type
3"	1/4"	250	-30 to 225	24	Open Tank	2832K13
4"	1/4"	500	-30 to 225	20	Open Tank	2832K14
4"	3/8"	500	-30 to 225	20	Open Tank	2832K15
5"	3/8"	400	-30 to 225	20	Open Tank	2832K21
6"	1/4"	150	-30 to 225	20	Open Tank	2832K23
6"	3/8"	150	-30 to 225	20	Open Tank	2832K24
6"	1/2"	150	-30 to 225	20	Open Tank	2832K25
7"	3/8"	150	-30 to 225	20	Open Tank	2832K27
8"	3/8"	150	-30 to 225	20	Open Tank	2832K29
8"	1/2"	150	-30 to 225	20	Open Tank	2832K31

316 Stainless Steel Ball Floats—For Water

Dia.	Through-Hole Dia.	Max. Pressure, psi	Temp. Range, ° F	Ga.	For Container Type		Each
2"	1/4"	300	-30 to 225	24	Open Tank	2885K11	000000

316 Stainless Steel Ball Floats—For Hydraulic Fluid, For Water

Dia.	Through-Hole Dia.	Max. Pressure, psi	Temp. Range, ° F	Ga.	For Container Type
3"	1/4"	250	-30 to 225	24	Open Tank	2885K13
4"	1/4"	500	-30 to 225	20	Open Tank	2885K14
4"	3/8"	500	-30 to 225	20	Open Tank	2885K15
5"	3/8"	400	-30 to 225	20	Open Tank	2885K21
6"	1/4"	150	-30 to 225	20	Open Tank	2885K23
6"	3/8"	150	-30 to 225	20	Open Tank	2885K24
6"	1/2"	150	-30 to 225	20	Open Tank	2885K25
7"	3/8"	150	-30 to 225	20	Open Tank	2885K27
8"	3/8"	150	-30 to 225	20	Open Tank	2885K29
8"	1/2"	150	-30 to 225	20	Open Tank	2885K31

Floats without Connections

These floats are untethered by a float rod so they can float freely in your tank.

316 Stainless Steel—316 stainless steel floats are more corrosion resistant than 304 stainless steel floats.

	Max. Pressure, psi	Temp. Range, ° F	Ga.	For Container Type		Each
304 Stainless Steel Ball Floats—For Hydraulic Fluid, Oil, and Water



	2"	250	-30 to 225	26	Open Tank, Closed Tank	2833K42	000000


	3"	250	-30 to 225	24	Open Tank, Closed Tank	2833K16	00000
	4"	375	-30 to 225	20	Open Tank, Closed Tank	2833K21	00000
	5"	500	-30 to 225	18	Open Tank, Closed Tank	2833K24	000000
	6"	450	-30 to 225	18	Open Tank, Closed Tank	2833K26	000000
	8"	275	-30 to 225	18	Open Tank, Closed Tank	2833K32	000000
	10"	200	-30 to 225	18	Open Tank, Closed Tank	2833K36	000000


	316 Stainless Steel Ball Floats—For Hydraulic Fluid, For Oil, For Water



			2"	250	-30 to 225	26	Open Tank, Closed Tank	2833K92	00000


			3"	250	-30 to 225	24	Open Tank, Closed Tank	2833K66	00000
			4"	375	-30 to 225	20	Open Tank, Closed Tank	2833K71	000000
			5"	500	-30 to 225	18	Open Tank, Closed Tank	2833K74	000000
			6"	450	-30 to 225	18	Open Tank, Closed Tank	2833K76	000000
			8"	275	-30 to 225	18	Open Tank, Closed Tank	2833K82	000000

Floats for Chemicals

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

Polyethylene Ball Floats

Image of Product. Front orientation. Floats. Floats for Chemicals, Ball.

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

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	8154K11	000000
6"	5/16"-18	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K21	00000
8"	1/4"-20	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K51	00000
8"	5/16"-18	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K41	00000
8"	3/8"-16	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K31	00000