In reducing couplings, the cam and groove end is the first size given in the part number. (i.e., a 4030-B-AL is a 4" coupler to a 3" male NPT).

Pressure rating is based on the seal of the mating part.
Unit of Measure

Specifications

Size

1-1/2 x 2 in

Material

Aluminum

Type

Male Adapter x Male NPT