Master Lock S3910 Gas Valve Lockout Red Thermoplastic

Gas Valve Lockout S3910

The Master Lock S3910 is a red thermoplastic lockout device designed for gas valve handles up to three inches in diameter. It accepts up to two padlocks with shackles no larger than five-sixteenths of an inch and meets OSHA 1910.148 requirements for energy isolation.

Fits standard valve wheels

The unit clamps directly onto the valve wheel without tools, covering the operating handle to prevent accidental actuation. Its thermoplastic body withstands temperatures from minus fifty to three hundred fifty degrees Fahrenheit, so it remains functional in harsh industrial environments. The integrated "Danger Do Not Operate" legend provides clear visual warning in English.

Suits maintenance crews needing OSHA-compliant

Workers securing gas lines during service will appreciate the dual-padlock capability and wide temperature range. Facilities requiring lockouts for larger valve wheels, different handle styles, or multilingual warnings should evaluate other devices.