Aluminum
Oil Level Sight Glasses
With Natural Glass
GN 743

GN 743

 GN 743 GN 743
Specification
Information

Sight glass body: Aluminum, turned, with bright finish
Sight glass: Natural glass
Seal: NBR synthetic rubber
Reflector: Heat resistant technopolymer plastic (Polysulfon)

Oil level sight glasses GN 743 offer the following features:
1. Genuine glass of high stability and scratch proof.
2. Sealing with an O-ring on the periphery and not on the face edge of the glass. Leak tightness is therefore not affected by axial pressures.
Oil level sight glasses GN 743 can be used on pressurized oil tanks. Tests regarding maximum pressure are available upon request.
NBR seal: maximum heat resistance: 100°C (212°F).
Sight glasses can be ordered with or without a reflector.

See our Technical Section for pipe thread size details.
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For CAD download instructions, click HERE
Metric Thread Table

Dimensions in:

millimeters
(inches)
Part Number
d1
d2
Thread
d3
l1
l2
s
Max Pressure,
psi @ 70°F
With
Reflector
Without
Reflector
11
(.43)
M16 x 1.5
22
(.87)
8
(.31)
7.5
(.30)
20
(.79)
725
14
(.55)
M20 x 1.5
26
(1.02)
8.5
(.33)
7.5
(.30)
23
(.91)
725
18
(.71)
M26 x 1.5
32
(1.26)
9
(.35)
8
(.31)
30
(1.18)
360
18
(.71)
M27 x 1.5
32
(1.26)
9
(.35)
8
(.31)
30
(1.18)
360
24
(.94)
M33 x 1.5
40
(1.57)
11
(.43)
8.5
(.33)
36
(1.42)
290
32
(1.26)
M40 x 1.5
50
(1.97)
12
(.47)
9
(.35)
46
(1.81)
180
32
(1.26)
M42 x 1.5
50
(1.97)
12
(.47)
9
(.35)
46
(1.81)
180
BSPP Parallel Thread Table

Dimensions in:

millimeters
(inches)
Part Number
d1
d2
Pipe Thread
d3
l1
l2
s
Max Pressure,
psi @ 70°F
With
Reflector
Without
Reflector
11
(.43)
G 3/8"
22
(.87)
8
(.31)
7.5
(.30)
20
(.79)
725
14
(.55)
G 1/2"
26
(1.02)
8.5
(.33)
7.5
(.30)
23
(.91)
725
18
(.71)
G 3/4"
32
(1.26)
9
(.35)
8
(.31)
30
(1.18)
360
24
(.94)
G 1"
40
(1.57)
11
(.43)
8.5
(.33)
36
(1.42)
290
32
(1.26)
G 1 1/4"
50
(1.97)
12
(.47)
9
(.35)
46
(1.81)
180