This end cap is designed with male threaded connections. Connection 1 has male G 3/8 inch threads. It also has an outer hexagon for tightening/loosening. It is an end cap, so it has no output port. It is made out of brass. At 20 °C (68 °F), it can handle a maximum pressure of 16 bar (232 psi). It has a 19 mm nut to be tightened with a wrench.
FL1-M series
The FL1-M series consists of fittings with 1 connection port, so they are end caps. G, R, NPT, and metric (standard and conical) threads with a size range of 1/8 inch to 2 inches (metric range from 5 to 14 mm). Designed with either an external hex (to be used with a wrench for example) or an inner hex for an allen wrench. Material options of brass, steel, or stainless steel. They are designed to stop the media flow.
Specifications
Thread : 3/8 inch
Connection type : Outer thread cylindrical BSPP-G
Fitting features : Capped
Material : Brass
Max pressure at 20 °C (bar) : 16
Material connection 1 : Brass
With drain : No
Wrench width (mm) : 19
![G 3/8'' Brass Closing plug with Outer Hex 16 Bar [5 Pieces]](https://www.coolgrittools.com/wp-content/uploads/2026/06/fl1-m-b-038g-e_01.b12d56bd.webp)




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