GN 743.7 Oil level sight glasses with conical thread Brass/ natural glass, up to 100 °C


GN 743.7 Oil level sight glasses with conical thread Type: B - without reflector
Type: B - without reflector
GN 743.7 Oil level sight glasses with conical thread Type: B - without reflector GN 743.7 Oil level sight glasses with conical thread Type: A - with reflector

Product description


The conical thread of the oil level sight glasses GN 743.7 makes a metallic seal possible. When tightening the conical male thread R it blocks itself with the appropriate cylindrical female thread Rp.

With the datum plane a the R-male thread has the same thread diameter as the Rp-female thread, so that it can be screwed in by hand. The strong tightening by means of a tool increases the length of engagement and seals the screw connection. Additionally a sealant (hemp or teflon band) is usually used. The R-thread is „roughened“, so that the sealant does not shift when screwing in.



Technoploymer (Polysulfon)

Sight glass
temperature resistant up to 100 °C

Rubber NBR (Perbunan®)


On request

EPDM seals

Technical drawing

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GN 743.7 Oil level sight glasses with conical thread sketch

Article options / Table


Awith reflector
Bwithout reflector
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Male thread
at a
Female thread

11R 3/86,416,7Rp 3/8-2213610,1191,34
113/8 NPT6,117,1-3/8 NPT22156-19,11,41
14R 1/28,221Rp 1/2-27,517713,2241,81
141/2 NPT8,121,2-1/2 NPT27,5167-23,81,81
18R 3/49,526,4Rp 3/4-3118814,5271,81
183/4 NPT8,626,6-3/4 NPT33188-28,61,81
24R 110,433,2Rp 1-40,521916,8362,30
241 NPT10,233,7-1 NPT41,5228-34,92,21
32R 1 1/412,742Rp 1 1/4-5324919,1462,30
321 1/4 NPT10,742,2-1 1/4 NPT51,5239-44,52,21

Build & Price

Window glass d1
Thread d2

Selected Part (How to order)

Weight: 0,019 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: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/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 175,00 Euro -> 10 % discount
from 275,00 Euro -> 20 % discount
from 375,00 Euro -> 30 % discount
With a total value (net) per order:
All prices in accordance with our price list No. 52, valid from 1 May 2019, plus VAT only valid for Germany.

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