Automatic E-Tank Lock, 1/4″ Thread Stop Losing Thumb Screws and Avoid Survey Tags Spring Loaded Automatic E-Tank Security Lock Complies With NFPA Code 7.1.4.4 and UFC 7401.6.4 Securing compressed gas containers, cylinders and tanks. Compressed gas containers, cylinders and tanks shall be secured to prevent falling due to contact, vibration or seismic activity. Securing of compressed gas containers, cylinders and tanks shall be by one of the following methods: Exception: Compressed gas containers, cylinders and tanks in the process of examination, filling, transport or servicing. Universal Fit: 4.5″ Diameter Ring O2 Tank Bolt Measure Approx. 1/4-20 x 1″ Also Available with 5/16-20 x 1″ Diameter #72-02452
