• Square Head Plugs for National Pipe Thread (NPT) Threads
  • Square Head Plugs for National Pipe Thread (NPT) Threads - 2
Square Head Plugs for NPT Threads protect NPT threads and fittings from moisture, dust and damage during low-pressure testing and in-plant handling. They can also be used as masking during plating and painting and are not intended for permanent applications.
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Item #

Item Name

Head Size

To Fit National Pipe Thread (NPT)

Threaded Area Length

N/A Square Head Plug for National Pipe Thread (NPT) 1/8-27 Size N/A 0.28 in7.1 mm N/A 1/8-27 N/A 0.29 in7.4 mm
N/A Square Head Plug for National Pipe Thread (NPT) 1/4-18 Size N/A 0.38 in9.7 mm N/A 1/4-18 N/A 0.35 in8.9 mm
N/A Square Head Plug for National Pipe Thread (NPT) 3/8-18 Size N/A 0.44 in11.2 mm N/A 3/8-18 N/A 0.42 in10.7 mm
N/A Square Head Plug for National Pipe Thread (NPT) 1/2-14 Size N/A 0.56 in14.2 mm N/A 1/2-14 N/A 0.47 in11.9 mm
N/A Square Head Plug for National Pipe Thread (NPT) 3/4-14 Size N/A 0.62 in15.7 mm N/A 3/4-14 N/A 0.52 in13.2 mm
N/A Square Head Plug for National Pipe Thread (NPT) 1-11 1/2 Size N/A 0.81 in20.6 mm N/A 1-11 1/2 N/A 0.59 in15 mm
N/A Square Head Plug for National Pipe Thread (NPT) 1 1/4-11 Size N/A 1 in25.4 mm N/A 1 1/4-11 N/A 0.83 in21.1 mm
N/A Square Head Plug for National Pipe Thread (NPT) 1 1/2-11 Size N/A 1.25 in31.8 mm N/A 1 1/2-11 N/A 0.83 in21.1 mm
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