Sight Domes | McMaster-Carr

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45 Products

About Air Preparation

Customize your air preparation system with dryers, filters, and other purifying parts.

Parker Compressed Air Lubricator Sight Domes

Replace a cracked or lost sight dome on your Parker compressed air lubricator. These sight domes let you keep an eye on how much lubricant is entering your air line. All come with an O-ring to ensure a tight seal.

	Material	Includes		Each
For Series No. P31, P32, and P33



	P31LB, P32LB, P33LA	Polycarbonate	O-Ring	3106N12	000000


	For Series No. 06, 07, 15, 16, 17, and P3N



			06L, 07L, 15L, 16L, 17L, P3N	Polycarbonate	O-Ring	3106N11	00000

Wilkerson Compressed Air Lubricator Sight Domes

Replace a cracked or lost sight dome on your Wilkerson compressed air lubricator. These sight domes let you keep an eye on how much lubricant is entering your air line. All come with an O-ring to ensure a tight seal.

	Material	Includes		Each
For Series No. 08



	L08	Polycarbonate	O-Ring	3282N13	000000


	For Series No. 16, 17, and 26



			L16, L17, L26	Polycarbonate	O-Ring	3282N11	00000


			For Series No. 18 and 28



					L18, L28	Polycarbonate	O-Ring	3282N14	00000


					For Series No. 30, 31, and 32



							L30, L31, L32	Nylon	O-Ring	3282N12	00000

Norgren Compressed Air Lubricator Sight Domes

Replace a cracked or lost sight dome on your Norgren compressed air lubricator. These sight domes let you keep an eye on how much lubricant is entering your air line. All come with an O-ring to ensure a tight seal.

	Material	Includes		Each
For Series No. 17, 72, 73, and 74



	L17, L72M, L73M, L74M	Nylon	O-Ring	3091N12	000000


	For Series No. 82 and 84



			L82M, L84M	Nylon	O-Ring	3091N13	00000

SMC Compressed Air Lubricator Sight Domes

Replace a cracked or lost sight dome on your SMC compressed air lubricator. These sight domes let you keep an eye on how much lubricant is entering your air line. All come with an O-ring to ensure a tight seal.

	Material	Includes		Each
For Series No. 10



	AL10-A	Polycarbonate	O-Ring	3303N101	00000


	For Series No. 20, 30, 40, 50, and 60



			AL20-A, AL20-D, AL30-A, AL30-D, AL40-A, AL40-D, AL50-A, AL50-D, AL60-A, AL60-D	Polycarbonate	O-Ring	3303N11	0000

Easy-View Sights

View tank contents from multiple angles through the plastic domed window.

Zinc-Plated Steel with Plastic Window

Zinc-plated steel sights have a shatter-resistant window.

	Window Dia.	Hex Size	Max. Pressure @ Temp.	Temp. Range, ° F	For Use With	Seal Material		Each
NPT Male



	3/4	1"	1 1/4"	10 psi @ 70° F	0 to 160	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	1128K3	000000


	1	1"	1 1/2"	10 psi @ 70° F	0 to 160	Water, Hydraulic Fluid, Diesel Fuel	Neoprene	1128K4	00000
	1 1/4	1 1/4"	1 7/8"	10 psi @ 70° F	0 to 160	Water, Hydraulic Fluid, Diesel Fuel	Neoprene	1128K5	00000
	1 1/2	1 5/8"	2 1/8"	10 psi @ 70° F	0 to 160	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	1128K6	00000

Plastic with Plastic Window

Plastic sights have an impact-resistant window and brass threads.

	Window Dia.	Max. Pressure @ Temp.	Temp. Range, ° F	For Use With		Each
NPT Male



	1/4	3/8"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T21	000000


	3/8	1/2"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T22	00000

Easy-View All-Plastic Sights

Machined from one piece of stain- and impact-resistant plastic. They have a domed window so you can view tank contents from multiple angles.

Plastic with Plastic Window

	Temp. Range, ° F	For Use With		Each
NPT Male







	With One-Piece Construction

	1/2	7/8"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T23	000000


	3/4	1 1/8"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T24	00000
	1	1 3/8"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T25	00000
	1 1/4	1 3/4"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T26	00000
	1 1/2	2"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T27	00000
	2	2 1/2"	65 psi @ 70° F	-40 to 180	Hydraulic Fluid	6406T28	00000

Press-Fit Through-Wall Sights

Press these sights into a hole in your tank wall; no additional mounting nuts are needed. They mount from the outside. The shatter-resistant plastic domed window allows you to view tank contents from multiple angles.

Zinc-Plated Brass with Plastic Window

Image of Product. Front orientation. Sights. Press-Fit Through-Wall Sights.

OD	Window Dia.	For Max. Tank Wall Thk.	Max. Pressure @ Temp.	Temp. Range, ° F	For Use With	Seal Material		Each



1 1/4"	1 1/4"	1"	9/32"	Not Rated	0 to 160	Water, Hydraulic Fluid, Diesel Fuel	Neoprene	1128K11	000000


1 1/2"	1 1/2"	1 1/4"	9/32"	Not Rated	0 to 160	Water, Hydraulic Fluid, Diesel Fuel	Neoprene	1128K12	00000
2"	2"	1 5/8"	9/32"	Not Rated	0 to 160	Water, Hydraulic Fluid, Diesel Fuel	Neoprene	1128K13	00000

Festo Compressed Air Lubricator Sight Domes

Replace a cracked or lost sight dome on your Festo compressed air lubricator. These sight domes let you keep an eye on how much lubricant is entering your air line. All come with an O-ring to ensure a tight seal.

	Material	Includes		Each
For Series No.4, 6, and 9



	MS4, MS6, MS9	Polycarbonate	O-Ring	8786N11	000000

Panel-Mount Flow Sights for Water, Oil, and Inert Gas

The included mounting ring lets you install these sights in instrument panels. They have three ball indicators that bounce in the domed-top window to show flow in your line.

	Flow Sights																Repair Kits
					Window							Indicator
	Pipe Size	Thread Type	Gender	Temp. Range, ° F	Dia.	Type	End-to-End Lg.	Ht.	Max. Pressure @ Temp.	Panel Cutout Dia.	Direction of Flow	No. of	Material	For Use With		Each		Each
Ball Indicator







				Brass Body

				1/4	NPT	Female	35 to 120	1 5/8"	Domed Top	3 1/8"	2 1/8"	150 psi @ 70° F	2 3/8"	Bottom to Top, Left to Right, Right to Left, Top to Bottom	3	White Polyethylene White Polyethylene Green Acrylic Plastic	Water, Oil, Inert Gas	4202K12	0000000	4202K216	000000


				3/8	NPT	Female	35 to 120	1 5/8"	Domed Top	3 1/8"	2 1/8"	150 psi @ 70° F	2 3/8"	Bottom to Top, Left to Right, Right to Left, Top to Bottom	3	White Polyethylene White Polyethylene Green Acrylic Plastic	Water, Oil, Inert Gas	4202K14	000000	4202K216	00000
				1/2	NPT	Female	35 to 120	1 5/8"	Domed Top	3 1/8"	2 1/8"	150 psi @ 70° F	2 3/8"	Bottom to Top, Left to Right, Right to Left, Top to Bottom	3	White Polyethylene White Polyethylene Green Acrylic Plastic	Water, Oil, Inert Gas	4202K16	000000	4202K216	00000
				3/4	NPT	Female	35 to 120	1 5/8"	Domed Top	3 1/8"	2 1/8"	150 psi @ 70° F	2 3/8"	Bottom to Top, Left to Right, Right to Left, Top to Bottom	3	White Polyethylene White Polyethylene Green Acrylic Plastic	Water, Oil, Inert Gas	4202K18	000000	4202K552	00000
				1	NPT	Female	35 to 120	1 5/8"	Domed Top	3 1/8"	2 5/8"	150 psi @ 70° F	2 3/8"	Bottom to Top, Left to Right, Right to Left, Top to Bottom	3	White Polyethylene White Polyethylene Green Acrylic Plastic	Water, Oil, Inert Gas	4202K19	000000	4202K552	00000

ARO Compressed Air Lubricator Sight Domes

Replace a cracked or lost sight dome on your ARO compressed air lubricator. These sight domes let you keep an eye on how much lubricant is entering your air line. All come with an O-ring to ensure a tight seal.

	Material	Includes		Each
For Series No. 1000



	1000	Polycarbonate	O-Ring	8792N11	000000


	For Series No. 1500



			1500	Nylon	O-Ring	8792N14	00000


			For Series No. 2000



					2000	Nylon	O-Ring	8792N12	00000


					For Series No. 3000



							3000	Nylon	O-Ring	8792N13	00000

Easy-View Flanged Sights

Check the contents of your tank from multiple angles with the domed window on these sights. The window is plastic, so it’s shatter resistant. To mount these sights, fasten their extended flange to tank walls.

Zinc with Plastic Window

Window Dia.	Bolt Circle Dia.	No. of Bolt Holes	For Screw Size	Max. Pressure @ Temp.	Temp. Range, ° F	For Use With	Seal Material		Each



2 1/4"	1 1/4"	1 7/8"	4	No. 8	10 psi @ 70° F	0 to 160	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	1128K22	0000000

Flanged Sights

An extended flange makes these sights easy to bolt onto tank walls. Sights for dark liquid have a reflector that makes liquid easy to see, especially in low-light conditions.

Zinc with Glass Window

Image of Product. Front orientation. Sights. Flanged Sights.

									For Dark Liquids
Flange OD	Window Dia.	Bolt Circle Dia.	No. of Bolt Holes	For Screw Size	Max. Pressure @ Temp.	Temp. Range, ° F	For Use With	Seal Material		Each



	1 5/8"	3/4"	1 5/16"	4	No. 6	10 psi @ 70° F	-20 to 250	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	3946N16	000000


	1 7/8"	1"	1 9/16"	4	No. 6	10 psi @ 70° F	-20 to 250	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	3946N17	000000
	2 9/16"	1 1/2"	2 5/32"	4	No. 8	10 psi @ 70° F	-20 to 250	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	3946N19	00000

Zinc-Plated Steel with Glass Window

									For Dark Liquids
Flange OD	Window Dia.	Bolt Circle Dia.	No. of Bolt Holes	For Screw Size	Max. Pressure @ Temp.	Temp. Range, ° F	For Use With	Seal Material		Each



	2 1/4"	1 1/4"	1 7/8"	4	No. 8	10 psi @ 70° F	-20 to 250	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	3946N18	0000000


	3 1/8"	2"	2 11/16"	4	No. 10	10 psi @ 70° F	-20 to 250	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Buna-N	3946N21	000000

Flow Sights with Indicator for Water and Oil

Ball Indicator

The indicator moves when flow is present, so it’s easy to visually confirm flow from a distance.

Ball Indicator—Ball indicator shows flow more prominently for easier viewing at a distance.

Bronze Body—Sights with a bronze body are harder and more durable than sights with a brass body for a longer service life.

					Window						Indicator
	Pipe Size	Thread Type	Gender	Temp. Range, ° F	Dia.	Type	End-to-End Lg.	Ht.	Max. Pressure @ Temp.	Direction of Flow	Material	Color	For Use With		Each
Ball Indicator







				Bronze Body

				1/2	NPT	Female	32 to 250	1 5/8"	Domed Top	2 7/8"	2 3/4"	100 psi @ 70° F	Left to Right, Right to Left	PTFE	White	Water, Oil	4220K63	0000000


				3/4	NPT	Female	32 to 180	2 7/8"	Domed Top	4 5/16"	3 3/4"	100 psi @ 70° F	Left to Right, Right to Left	PTFE	White	Water, Oil	4220K17	000000