High Visibility Sights | McMaster-Carr

	Pipe Size Pipe Size

	Thread Type Thread Type

NPT

NPTF

UN/UNF (SAE Straight)

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Material Material

Brass

Steel

	For Use With For Use With

Diesel Fuel

Hydraulic Fluid

Water

	Window Diameter Window Diameter

	For Liquid Type For Liquid Type

Dark

	Hex Size Hex Size

	Maximum Pressure Maximum Pressure

	Connection Type Connection Type

	Pipe

	Gender Gender

Male

	Connection Style Connection Style

	Threaded

	Maximum Temperature Maximum Temperature

Less than 250° F

250° to 499° F

	Minimum Temperature Minimum Temperature

-49° to 0° F

	Window Material Window Material

Glass

	Mount Type Mount Type

Screw

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Seal Material Seal Material

Rubber

	Specifications Met Specifications Met

SAE

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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25 Products

High-Visibility Sights

Easily view liquid movement and level changes from a distance—these sights have an indicator ball inside the glass window. They also have a reflector that makes dark liquid easy to see, especially in low-light conditions.

Brass sights have good corrosion resistance.

UN/UNF (SAE Straight) threads are also known as O-ring boss threads; a gasket can be added to prevent leaks.

For technical drawings and 3-D models, click on a part number.

					Temp. Range, °F							For Dark Liquid
Pipe Size	Thread Size	Window Dia.	Hex Size	Max. Pressure	Min.	Max.	For Use With	Window Material	Seal Material	Features	Specifications Met		Each
Steel
NPT Male Thread
1/2	__	1/2"	1"	125 psi @ 70° F	-40°	250°	Water, Hydraulic Fluid, Diesel Fuel	Glass	__	Fused Window, Indicator Ball	__	0000000	000000
1	__	1"	1 3/8"	125 psi @ 70° F	-40°	250°	Water, Hydraulic Fluid, Diesel Fuel	Glass	__	Fused Window, Indicator Ball	__	0000000	00000
1 1/4	__	1 1/4"	1 3/4"	125 psi @ 70° F	-40°	250°	Water, Hydraulic Fluid, Diesel Fuel	Glass	__	Fused Window, Indicator Ball	__	0000000	00000
1 1/2	__	1 1/2"	2"	125 psi @ 70° F	-40°	250°	Water, Hydraulic Fluid, Diesel Fuel	Glass	__	Fused Window, Indicator Ball	__	0000000	00000
2	__	2"	2 1/2"	125 psi @ 70° F	-40°	250°	Water, Hydraulic Fluid, Diesel Fuel	Glass	__	Fused Window, Indicator Ball	__	0000000	00000
NPTF Male Thread
3/8	__	3/8"	3/4"	125 psi @ 70° F	-40°	250°	Water, Hydraulic Fluid, Diesel Fuel	Glass	__	Fused Window, Indicator Ball	__	0000000	00000
3/4	__	3/4"	1"	125 psi @ 70° F	-40°	250°	Water, Hydraulic Fluid, Diesel Fuel	Glass	__	Fused Window, Indicator Ball	__	0000000	00000
UN/UNF (SAE Straight) Male Thread
__	3/4"-16	9/16"	7/8"	75 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	SAE J1926/3	0000000	00000
__	1 1/16"-12	3/4"	1 1/4"	75 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	SAE J1926/3	0000000	00000
__	1 5/16"-12	15/16"	1 1/2"	75 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	SAE J1926/3	0000000	00000
__	1 7/8"-12	1 7/16"	2"	20 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	SAE J1926/3	0000000	00000
Brass
NPTF Male Thread
3/8	__	7/16"	3/4"	100 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
3/8	__	7/16"	3/4"	415 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1/2	__	9/16"	7/8"	100 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1/2	__	9/16"	7/8"	250 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
3/4	__	3/4"	1 1/8"	60 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
3/4	__	3/4"	1 1/8"	200 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1	__	15/16"	1 7/16"	60 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1	__	15/16"	1 7/16"	100 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1 1/4	__	1 1/8"	1 3/4"	60 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1 1/4	__	1 3/16"	1 3/4"	25 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1 1/2	__	1 3/8"	2"	50 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
1 1/2	__	1 7/16"	2"	25 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
2	__	1 7/8"	2 1/2"	10 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	00000
2	__	1 7/8"	2 1/2"	20 psi @ 70° F	-40°	180°	Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based)	Glass	Buna-N Rubber	Indicator Ball	__	0000000	000000