Product Name: High Pressure Hex Plug
Type: Hex Plug
Material: ASTM A105N
Standard: ASME / ANSI B16.11
Size: 2-1/2 Inch
Pressure Rating: Class 6000 LB
End Connection: NPT Threaded
Application: High Pressure Piping / Heavy Duty Industrial Systems

Source: https://www.landee.cn/high-pressure-hex-plug-ansi-b16-11-a105n-2-1-2-in-cl6000.html