For circular sightports to DIN 28120, ANSI Bolt-On or similar.
Application:
For manual cleaning of inside glass surface of sightports.
Installation:
Sightglass disc with central bore hole 10.5 mm (.413″) dia. (similar to DIN 7080/8902), suitable for sightglass assemblies from a nominal bore DN 50, 2″ and greater.
