GN 537 Oil level sight glasses Aluminum / Perspex, without thread


Product description


This oil level glass GN 537 does not require a thread.

The oil level sight glass is inserted into the bore d2 to H11. By simply tightening the ring nut using the pin key the seal is pressed against the contact surface which, at the same time, will hold the sight glass in position. For removal reverse the procedure.

Their application is limited to non-pressurised or only slightly pressurised tanks.


Ring nut

Window glass
Perspex (PMMA)
temperature resistant up to 80 °C

Rubber NBR (Perbunan)

white, with red oil level marks

RoHS compliant


Pin key for installation GN 537.1
(code no. see table)

Technical drawing

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GN 537 Oil level sight glasses, Aluminum / Perspex sketch

Article options / Table


Awithout max. / min. oil level marks
Bwith max. / min. oil level marks
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Window glass
d3d4±0,1hl1l2Code no.
Pin key
for installation
16209252,2215153,5GN 537.1-21
222810353306154,5GN 537.1-30
323812453408185,5GN 537.1-40
50581464358,510225,5GN 537.1-58,5

Build & Price

Window glass d1
Pressing diameter d2

Selected Part (How to order)

Weight: 0,008 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone+49 7723 6507 - 0
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)).
Please note our quantity discounts.
With a total value (net) per order:
from 150 Euro -> 10 % discount
from 250 Euro -> 20 % discount
from 350 Euro -> 30 % discount
All prices in accordance with our price list No. 51, valid from 1 February 2018, plus VAT only valid for Germany.

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