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- Brand: Mueller
- Mueller boasts an extensive line of black and galvanized malleable iron fittings and steel nipples. Galvanized items are coated for water applications and meet low lead requirements. Fittings are offered from 1/8 - 6 in Dia. Each fitting has the Mueller brand cast into the body, a sign of assured 100 percent quality inspection and testing.
- Available in black finish for oil and gas fluid applications|
- Available for servicing 15 psi and 3 psi applications
- Mueller Pipe Plug, Square Head, Series: 521, Fitting/Connector Type: Plug, 1/2 in Nominal, MNPT, 150 lb Pressure Class, 300 psi, Malleable Iron, Black Oxide, -20 to 150 deg F