GN 541 Oil level sight glasses Crystal-clear plastic


ELESA Original design
code: HFTX.

Product description


Oil level sight glasses GN 541 are practically indestructible. Even at high torque there is no danger of any breakage.

These oil level sight glasses can also be used in tanks which are pressurised. The max permissible pressure is dependent on the tank size operating conditions (i.e. temperature). Test results are available.

Assembly instruction:
For mounting on walls of less than 4 mm thickness please use a mounting nut GN 543.1.


Crystal-clear Polyamid (PA 6-T)
  • ageing resistant
  • high mechanical strength,
    but not suitable for alcohol
  • temperature resistant up to 100 °C
  • solvent resistant,
    but not suitable for alcohol

Rubber NBR (Perbunan®)

natural color, anodized

RoHS compliant


Mounting nuts GN 543.1

Technical drawing

Hide technical drawing
GN 541 Oil level sight glasses, Plastic sketch

Article options / Table


Awith reflector
Bwithout reflector
Show / Hide columns
Window glass
tightening torque in Nm
11M 16 x 1,5-2287192 ... 3
14M 20 x 1,5-269,58228 ... 10
18M 25 x 1,5-31,589278 ... 10
18M 26 x 1,5-31,5139278 ... 10
20M 27 x 1,5-31,599278 ... 10
22M 30 x 1,5-35910308 ... 10
25M 35 x 1,5-401110348 ... 10
30M 40 x 1,5-47,511,51340,58 ... 10
9-G 1/418106152 ... 3
11-G 3/8227,57193 ... 5
14-G 1/22610,58224 ... 6
20-G 3/431,510,59276 ... 8
25-G 1401110348 ... 10
30-G 11/447,511,51340,5810

Build & Price

Window glass d1
Fine thread d2
Inch thread d2

Selected Part (How to order)

Weight: 0,002 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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