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Three-inch bronze square-head plug with threaded end

Legend Valve

Legend Valve 310-190NL 3" Bronze Square Head Plug No Lead

SKU CH-6F3S-JF5QA

A 3-inch threaded bronze square-head plug with no-lead construction for potable-water systems

  • 3" NPT threads fit standard piping directly
  • No-lead bronze meets potable-water safety requirements
  • Square head allows positive wrench engagement
  • Cast bronze body resists corrosion in water systems
  • California Proposition 65 warning applies to this product

Product Identity

This is a three-inch threaded cast bronze square head plug with male NPT threads. It is designed for plumbers and maintenance technicians who need to close a female threaded opening in a piping system. The no-lead bronze construction makes it suitable for potable water lines and other applications where lead content is restricted.

Build and Connection

The square head allows a standard wrench to apply torque for a secure seal without damaging the fitting. Cast bronze provides corrosion resistance and mechanical strength for typical residential and commercial plumbing pressures. The male NPT threads create a tapered seal when tightened into a compatible female fitting, and the no-lead alloy helps meet modern health and safety standards for drinking water.

Practical Limits

The tapered thread form relies on thread engagement and sealant to prevent leaks, so proper installation technique is required. California Proposition 65 warnings indicate the product contains chemicals known to cause cancer and reproductive harm, which installers should note when handling the fitting. This plug is intended only for capping off threaded ports and cannot be used to connect pipes or adapt to other thread types.

Highlights

  • 3" NPT threads fit standard piping directly
  • No-lead bronze meets potable-water safety requirements
  • Square head allows positive wrench engagement
  • Cast bronze body resists corrosion in water systems
  • California Proposition 65 warning applies to this product

Specifications

BrandLEGEND VALVE

Questions about this item

What thread standard does the 3" square-head plug use?

It uses MNPT threads, the standard tapered pipe thread for sealing in plumbing systems.

What are the physical dimensions and material of this plug?

The plug is a 3-inch cast bronze fitting with a square head for wrench engagement.

How is the plug installed and what common mistake should be avoided?

Apply thread sealant to the MNPT threads and tighten with a wrench on the square head; avoid over-tightening which can crack the bronze casting.

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