Amazon.com: Gas Cylinder Regulator Protector Safety Cap Fine Thread 3-1/8 x 11
Gas Cylinder Lockout Devices, Cylinder Lockouts | Seton
Amazon.com: 1 Gallon Portable Gas Can Gas Tank with Spill-Proof Spout Design and Locking Cap (EPA and CARB Approved) : Automotive
Kenworth Leak Defender Fuel Cap and Anti-Siphon
Airgas - STCSC2FNNP-12 - Saf-T-Cart 3 1/2 in - 11 in Steel 1 Low Pressure Snap Cap
Perko Locking Gas cap insert
Snap Cap - Low Pressure - Fine Thread -Yellow | Beverage Gas Supplies
PERKO Inc. - Catalog - Fills & Tank Vents - Fuel System Locking Cap for 1-1/2" Non-Vented Fills [1324]
Lockey Abs Pneumatic Gas Cylinder Tank Lockout Safety Valve Lock - Buy Cylinder Tank Lockout,Pneumatic Lockout,Cylinder Tank Lock Valve Lockout Product on Alibaba.com
Airgas - RAD64003551 - RADNOR™ 1 Cylinder Cap
Gas cylinder locking system simple and easy idea. - YouTube