Square Head Flanged Plugs for NPT Threads protect NPT Threads 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

To Fit National Pipe Thread (NPT)

Flange Outside Diameter

Threaded Area Length

04MSFPN0125RD4 N/A Square Head Flanged Plug for National Pipe Thread (NPT) 1/8-27 Size Thread N/A 1/8-27 N/A 0.55 in14.0 mm N/A 0.29 in7.4 mm
04MSFPNO250RD4 N/A Square Head Flanged Plug for National Pipe Thread (NPT) 1/4-18 Size Thread N/A 1/4-18 N/A 0.670 in17 mm N/A 0.35 in8.9 mm
04MSFPNO375RD4 N/A Square Head Flanged Plug for National Pipe Thread (NPT) 3/8-18 Size Thread N/A 3/8-18 N/A 0.800 in20.3 mm N/A 0.41 in10.4 mm
04MSFPN0500RD4 N/A Square Head Flanged Plug for National Pipe Thread (NPT) 1/2-14 Size Thread N/A 1/2-14 N/A 0.98 in24.9 mm N/A 0.47 in11.9 mm
04MSFPN0750RD4 N/A Square Head Flanged Plug for National Pipe Thread (NPT) 3/4-14 Size Thread N/A 3/4-14 N/A 1.240 in31.5 mm N/A 0.52 in13.2 mm
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