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System of Measurement
Inch
Metric
Pipe Size
1/8
1/4
3/8
1/2
3/4
1
1
1/4
1
1/2
2
Thread Type
Acme
BSPP
Metric
NPT
NPTF
UN/UNF (SAE Straight)
UNF
UNS
Material
Aluminum
Brass
Bronze
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Glass
Graphite Composite
Iron
Plastic
Quartz
Rubber
Stainless Steel
Steel
Zinc Alloy
For Use With
Alcohol-Based Solvents
Beverage
Chemicals
Compressed Air
Food
Liquids
Acetic Acid (White Vinegar)
Air
Alcohol
Ammonia
Ammonium Hydroxide
Benzene
Boric Acid
Citric Acid
Coolant
Diesel Fuel
Ethanol
Fuel Oil
Window Diameter
1/4"
5/16"
3/8"
7/16"
1/2"
9/16"
5/8"
11/16"
3/4"
13/16"
7/8"
15/16"
1"
1
1/16"
1
1/8"
1
3/16"
1
1/4"
1
5/16"
1
3/8"
1
7/16"
1
1/2"
1
9/16"
1
5/8"
1
3/4"
1
7/8"
1
15/16"
2"
2
3/16"
2
1/2"
2
9/16"
2
5/8"
2
3/4"
2
7/8"
3
1/8"
3
1/4"
3
1/2"
3
35/64"
4"
5"
Thread Size
1/2"
-20
5/8"
-27
3/4"
-16
3/4"
-27
1
1/16"
-12
1
5/16"
-5
1
5/16"
-12
1
7/8"
-12
M16
M20
M25
M27
M30
M40
Maximum Temperature
Less than 200° F
200° F to 249° F
250° F to 399° F
400° F to 499° F
500° F or greater
Not Rated
Maximum Pressure @ Temperature
10 psi @ 70° F
20 psi @ 70° F
25 psi @ 70° F
30 psi @ 70° F
50 psi @ 70° F
60 psi @ 70° F
65 psi @ 70° F
70 psi @ 70° F
75 psi @ 70° F
90 psi @ 70° F
100 psi @ 70° F
110 psi @ 70° F
120 psi @ 70° F
125 psi @ 70° F
130 psi @ 70° F
150 psi @ 70° F
175 psi @ 70° F
180 psi @ 70° F
Hex Size
5/8"
3/4"
13/16"
7/8"
15/16"
1"
1
1/16"
1
1/8"
1
3/16"
1
1/4"
1
3/8"
1
7/16"
1
1/2"
1
5/8"
1
3/4"
1
7/8"
2"
2
1/8"
2
3/16"
2
1/4"
2
1/2"
2
5/8"
2
3/4"
Fitting Connection
Barbed
Cam and Groove
Flanged
Quick Clamp
Threaded
For Liquid Appearance
Clear
Dark
Gender
Female
Male
Window Material
Glass
Plastic
Quartz
Shape
90° Elbow
Cap and Plug
Flat Oval
Straight
Tube
Connection Center-to-Center
3"
4"
5"
6"
7"
8"
8
1/4"
9"
9
3/8"
10"
10
5/8"
11
1/4"
11
3/4"
12"
13
1/4"
13
3/8"
14"
14
1/8"
15"
16"
17
1/2"
18"
20"
22"
24"
30"
Connects To
Hose
Pipe
Tube
Valve
Minimum Temperature
-250° F or less
-249° F to -50° F
-49° F to -1° F
0° F to 49° F
50° F or greater
Not Rated
Mount Type
Clamp On
Flange
Screw
Screw In
Weld On
Seal Material
Plastic
Rubber
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
Yes
No
RoHS
Compliant
Compliant with Exemptions
Not Compliant
REACH
Compliant
Not Compliant
DFARS Specialty Metals
Exempt
Export Control Classification Number (ECCN)
2B999
EAR99
OD
1/2"
5/8"
11/16"
3/4"
27/32"
29/32"
15/16"
1"
1
1/4"
1
1/2"
2"
2
1/2"
3"
3
5/8"
4"
4
7/16"
5"
5
13/16"
7"
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1,173 Products
Sights
Sights
Observe and monitor the contents of pipes, tanks, and other containers
85 products
Shatter-Resistant Sights
Window and body are made from a single piece of plastic for shatter resistance
17 products
High-Visibility Sights
An indicator ball lets you view liquid movement and level changes from afar
25 products
Easy-View Sights
View tank contents from multiple angles through the plastic domed window
6 products
High-Pressure Sights
Thick glass fused to a metal body resists cracking at high pressures
21 products
Press-Fit Through-Wall Sights
Press into a hole from the outside of your tank, no mounting nuts required
3 products
Easy-View All-Plastic Sights
View tank contents from multiple angles through the plastic domed window
6 products
Through-Wall Sights
Mount in unthreaded holes from the inside of your tank using a lock nut
24 products
Sights for Oil Inspection
Reservoir is made of clear plastic so you can monitor oil quality
6 products
Easy-View Flanged Sights
Check tank contents from multiple angles through the domed window
The extended flange is easily bolted to tank walls
1 product
Flanged Sights
The extended flange is easily bolted to tank walls
5 products
High-Temperature Sights
Quartz window withstands heat up to 1600° F in equipment such as kilns
6 products
Sights for Quick-Clamp Sanitary Tube Fittings
Connect to quick-clamp fittings in food processing lines
12 products
Weld-On Sights
Weld to single-wall tanks in equipment such as process vessels and mixers
6 products
Ultra-High-Vacuum Flanged Sights
A CF flange bolts onto vacuum chambers, tee fittings, and manifolds
11 products
High-Vacuum Sights for Quick-Clamp Fittings
Connect to ISO-KF quick-clamp connections on high-vacuum chambers
12 products
Other Products
Liquid-Level Gauges
Monitor fluid levels in containers
574 products
Flow Sights
Visually confirm flow and inspect liquid color and clarity
154 products
Gauge Glass
Create or repair liquid-level gauges to monitor fluid levels in containers
138 products
Flow Transmitters
Send flow rate measurements to PLCs, data loggers, and remote displays
29 products
Gauge Glass Gaskets
Seal the glass on level indicators to monitor liquids without leaks
14 products
Hose and Hose Fittings
Flexible and stronger than tubing; often used to convey liquids and gases under pressure
2 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)