Fire Safe¬†| ASTM | 52.5 outside diameter (mm) –¬†Inside diameters (mm)

Fire Safe PSI plug

52.5-19/20mm

Fire Safe PSI plug

52.5-30/31mm

Fire Safe PSI plug

52.5-22/23mm

Fire Safe PSI plug

52.5-32/33mm

Fire Safe PSI plug

52.5-23/24mm

Fire Safe PSI plug

52.5-28/29mm