3151 Brass Male NPT Square Head Plug Check Part Number A NPT C L WORKING PRESSURE 3151-02 1/8-27 .285 .60 1200 psi 3151-04 1/4-18 .373 .787 1200 psi 3151-06 3/8-18 .419 .728 1200 psi 3151-08 1/2-14 .563 .968 1200 psi 3151-12 3/4-14 .62 1.016 1200 psi
