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Barrel Locks & Keys

Gas Valve Locks

General Purpose Locks

Cap Lock Assembly

Secures Male Pipe Threads from Unauthorized Access


The Cap Lock Assembly is a heavy duty steel locking assembly engineered to secure male pipe threads from unauthorized access. The internal cap meets NPT standards for pipe. The outer body is tapered and will freely rotate around the inner cap preventing efforts to unscrew the device. Special design features prevent moisture or glue from seeping between the inner and outer bodies. Cap Locks are available in standard thread sizes from 1/2" to 2".

Cap Lock Assembly


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Features and Benefits


• Heavy duty carbon steel construction
• Case hardened components resist cutting with hacksaws and other tools
• Threaded cap meets NPT standards
• Available in multiple sizes to fit 1/2" to 1-1/2" male pipe
• Available with optional metal or steel sealing ferrule
• Available with your choice of Inner-Tite standard length barrel lock
• Specially plated for corrosion resistance

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Additional Cap Lock Assembly Images

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The Cap Lock Assembly is an ideal solution for securing exposed male pipe threads.

The Outer Body turns freely while the Inner Body remains securely threaded in the pipe preventing the device from being unscrewed.

Cap Locks are available with an optional Metal Sealing Ferrule or Heavy Duty Steel Sealing Ferrule. Both provide an excellent means to seal the assembly.

Cap Lock Installed

Free Turning Outer Body

Optional Sealing Provisions