Schroeder has a line of reservoir weld flanges. These flanges have SAE female O-ring port threads and are intended to be welded into a reservoir.
Unit of Measure

Specifications

Port Thread Size

N/A 3 3/8 in. - 12 UNF-2B

SAE Size

N/A SAE 48

Type

N/A SAE female O-ring port threads and are intended to be welded into a reservoir.

Material

N/A Forged Steel

Finish

N/A Black Phosphate (Suitable for Welding)

Dimensions

Outside Diameter

N/A 4.63 in118 mm

Hole Diameter

N/A 3.66 in93 mm

Flange Thickness

N/A 0.81 in21 mm

Hub Diameter

N/A 3.94 in100 mm