This reducing nipple is designed with male and female threads. Connection 1 has R 1/2 inch threads. Connection 2 has Rp 3/8 inch threads. It is a straight fitting. It is made out of cast iron (malleable) and is galvanic/electrolytic zinc plated for surface protection. At 20 °C (68 °F), it can handle a maximum pressure of 25 bar (363 psi).
FL2S-FM series
The FL2S-FM series are straight fittings with one female connection point and one male connection point. Thread standards of NPT, R, Rp, G, and metric are available. They are a 1-part design made out of brass, cast iron, steel, nitrified steel, and stainless steel.
Specifications
Thread : 1/2 inch
Thread (smaller) : 3/8 inch
Connection type : Outer thread conical BSPT-R,Inner thread cylindrical BSPT-Rp
Material : Cast iron
Max pressure at 20 °C (bar) : 25
Fitting features : Reducing
Quality of material : Malleable cast iron
Model : 1-part
Material connection 1 : Cast iron
Material connection 2 : Cast iron
Material quality connection 1 : Malleable cast iron
Material quality connection 2 : Malleable cast iron
Shape : Straight
Surface protection connection 1 : Galvanic/electrolytic zinc plated
Surface protection connection 2 : Galvanic/electrolytic zinc plated
![R 1/2'' x Rp 3/8'' M/F Zinc plated Cast iron Reducing Ring 25 Bar [5 Pieces]](https://www.coolgrittools.com/wp-content/uploads/2026/06/fl2s-mf-iz-012r-038r_00.154dfe35.webp)




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