GN 743 Fluid Level Sight Glasses Aluminum, With Natural Glass, resistant up to 212° F (100° C), black anodized


Product description


GN 743 Fluid level sight glasses 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.
3. The seal is housed in a groove and it can therefore not be lost. In addition, this groove prevents the seal from being extruded when the sight glass is tightened. The location of this seal allows also the softer elastomer which guarantees better and easier sealing.

GN 743.1 Fluid level sight glasses can be used on pressurized oil tanks. Tests regarding maximum pressure are available upon request.

Sight glasses can be ordered with or without a reflector.

Note: When mounting fluid level sight glases on walls of less than 4 mm thickness, use nut GN 543.1.


Sight glass body
  • Aluminum
  • fine turned, black anodized

Contrast screen
Technopolymer (Polsysulfon)

Sight glass
  • Float glass
  • Maximum heat resistance 212 °F (100 °C)

Rubber NBR (Perbunan®)

RoHS compliant


Fixing nuts GN 543.1

Technical drawing

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GN 743 Aluminum Fluid Level Sight Glasses, With Natural Glass, resistant up to 212° F (100° C), black anodized sketch

Part Options / Table


ASwith contrast screen, black anodized
BSwithout contrast screen, black anodized
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Dimensions in: Inch | Metric
Pipe Thread
.28G 1/4M 14 x 1.5-.
.43G 3/8M 16 x 1.5-.
.55G 1/2M 20 x 1.5-
.71G 3/4M 26 x 1.5M 27 x
.94G 1M 33 x 1.5-
1.26G 11/4M 40 x 1.5M 42 x
1.26G 11/2--

Build & Price

Window glass d1
Inch thread d2
Fine thread d1

Selected Part

Total USD (net)
In stock: 0
Call / Email for Delivery Time
Please note our quantity discounts (USD).
≥ 250$9.45
Weight: 0.012 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
RoHS compliant: Yes
This article conforms to RoHS, which means it complies with EU Directive 2011/65/EU for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).
All Prices are in US Dollars. Taxes Not Included.

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