Master Lock S3476 Wedge-Style Ball Valve Lockout 1/4" to 1" Diameter

The Master Lock S3476 is a wedge-style, quarter-turn ball valve lockout device designed for use in lockout/tagout (LOTO) safety programs. Built with a heat-resistant powder-coated steel body, this compact device securely locks manual ball valves in the OFF position to prevent accidental or unauthorized operation during maintenance and servicing.

Key Features:

• Fits manual, quarter-turn ball valve handles on valves between 1/4 in (6 mm) and 1 in (25 mm) in diameter
• Single-piece wedge-style design locks valve firmly in the OFF position
• Two rows of lockout points allow for a more secure and accurate fit
• Constructed of heat-resistant powder-coated steel for durability in demanding environments
• Compact size for easy portability — can be stored in a tool bag or lockout kit
• Compatible with standard lockout padlocks (sold separately)
• Red finish for high visibility and quick identification

The Master Lock S3476 is an essential component of any industrial lockout/tagout kit, helping facilities comply with OSHA 29 CFR 1910.147 energy control procedures. Its rugged steel construction and intuitive one-piece design make it reliable for repeated use across industrial, manufacturing, and maintenance environments.