This website uses cookies. You can find out more by viewing our cookie policy hereAccept & Close



Catalogue Technical Specification

CAD Data

3D CAD Files
2D CAD Files
GN743.8 Type A 3D CAD Model
GN743.8 Type B 3D CAD Model


GN743.8 Oil Level Sight Glass, Conical Thread, Brass & ESG Glass



GN743.8: Oil Level Sight Glass
Type: B - without Reflector


GN743.8: Oil Level Sight Glass
Type: A - with Reflector

CAD Viewer Technical Data

Series Selector

CAD Viewer Technical Data

Product Description

GN743.8 Oil Level Sight Glass, Brass ESG Glass, Conical Thread

The conical thread of these oil level sight glasses, GN 743.8 makes a metallic seal possible. When tightening, the conical male thread R blocks itself with the appropriate cylindrical female thread Rp.

With the datum plane a the male thread R has the same thread diameter as the Rp female thread, so that it can be screwed in by hand. Stronger tightening using 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.

Oil level sight glasses GN743.8 can also be used on pressurised tanks. Pressure and vacuum pressure test data is available.


Body - Brass MS CuZn40Pb2

Contrast screen - Technoploymer (Polysulfon), temperature resistant up to 180 °C

Sight glass - ESG glass

O ring - rubber FPM (Viton®), identification by not black finish of the sealing ring

On Request

EPDM seals

Related Series

Quality & Certification
Download our quality certificates & service information documentation


Email Address:

University or DIY Project
Friendly, technical help & advice and a low minimum order value of £5.00

Our Reviews & Feedback
Our customers are important to us Real feedback from real customers

Trade Accounts Welcome
30 day credit accounts available Easy, quick online application form

Key Cloud...
GN743.8 Oil Level Sight Glasses Brass ESG Conical Thread metallic seal pressurised tanks

HomeContact UsCompanyProductsYour BergerCataloguesFAQsDiscounts & Delivery ChargesBusiness Code of PractiseTerms and Conditions
Follow Us
© Berger Tools Ltd 2018 Admin Website by Goldhosts
Payment Methods