Forged pipe fittings are made according to ASME B16.11, MSS-SP-79\83\95\97 and BS3799 standards. It is a connector in between nominal bore pipes.
Rfs Brass 22mm Od X 10mm Od Reducing Union Coupling Compression
JIC Fittings - RFS Hydraulics
Pipe Fittings - 3000# Forged SS - Reducing Couplings (3030-RQSW)
Hydraulic Hose Adapters - Straight Fitting, FS6540 Series
NPT Reducing Tee 6000# – Reliable Fluid Systems
0035V-04 Green Line Hose & Fittings
NPT Boss 3000# – Reliable Fluid Systems
R4011754 Meritor_NA
Hydraulic Fittings & Adapters, Wil-Tech Industries Ltd.
NPT Tee 6000# – Reliable Fluid Systems
: Industrial & Scientific
RFS Stainless Steel SS316 Boss Forged Pipe Fitting, 1 1/4” NPT Female Thread, up to 3000 PSI, High Pressure Forged Pipe Fitting, Boss Connector