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Parker Instrumentation Pipe Fittings are designed as leak-free connections for process, power, instrumentation and general industrial applications. They are manufactured to the highest quality standards and are available in broad ranges of sizes, materials and configurations.

Parker Instrumentation Pipe fittings are made at the Instrumentation Products Division of Parker Hannifin in Huntsville, Alabama. These fittings are manufactured where strict adherence to quality control programs is maintained.

NOTE:
Dimensions for reference only, subject to change.
Reducing Bushing RB
Unit of Measure
1 

Item #

Connection Type

NPT Thread Male T1

NPT Thread Female T2

W HEX

D

R

Working Pressure - Brass

Working Pressure - Stainless Steel

Working Pressure - Steel

2-1 RB N/A FNPT to MNPT N/A 1/8 N/A 1/16 N/A 7/16 in N/A .63 in N/A .38 in N/A 2900 psig N/A 6400 psig N/A 6800 psig
4-1 RB N/A FNPT to MNPT N/A 1/4 N/A 1/16 N/A 5/8 in N/A .86 in N/A .56 in N/A 4100 psig N/A 7500 psig N/A 8000 psig
4-2 RB N/A FNPT to MNPT N/A 1/4 N/A 1/8 N/A 5/8 in N/A .86 in N/A .56 in N/A 3600 psig N/A 6000 psig N/A 6400 psig
6-1 RB N/A FNPT to MNPT N/A 3/8 N/A 1/16 N/A 3/4 in N/A .86 in N/A .56 in N/A 4000 psig N/A 7200 psig N/A 7600 psig
6-2 RB N/A FNPT to MNPT N/A 3/8 N/A 1/8 N/A 3/4 in N/A .86 in N/A .56 in N/A 4000 psig N/A 6400 psig N/A 6800 psig
6-4 RB N/A FNPT to MNPT N/A 3/8 N/A 1/4 N/A 3/4 in N/A .86 in N/A .56 in N/A 3000 psig N/A 5300 psig N/A 5600 psig
8-2 RB N/A FNPT to MNPT N/A 1/2 N/A 1/8 N/A 7/8 in N/A 1.11 in N/A .75 in N/A 3900 psig N/A 6600 psig N/A 6800 psig
8-4 RB N/A FNPT to MNPT N/A 1/2 N/A 1/4 N/A 7/8 in N/A 1.11 in N/A .75 in N/A 3900 psig N/A 6400 psig N/A 7000 psig
8-6 RB N/A FNPT to MNPT N/A 1/2 N/A 3/8 N/A 7/8 in N/A 1.11 in N/A .75 in N/A 2800 psig N/A 4600 psig N/A 4900 psig
12-2 RB N/A FNPT to MNPT N/A 3/4 N/A 1/8 N/A 1 1/8 in N/A 1.17 in N/A .75 in N/A 3800 psig N/A 6400 psig N/A 6800 psig
12-4 RB N/A FNPT to MNPT N/A 3/4 N/A 1/4 N/A 1 1/8 in N/A 1.17 in N/A .75 in N/A 3800 psig N/A 6400 psig N/A 6800 psig
12-6 RB N/A FNPT to MNPT N/A 3/4 N/A 3/8 N/A 1 1/8 in N/A 1.17 in N/A .75 in N/A 3500 psig N/A 5300 psig N/A 5600 psig
12-8 RB N/A FNPT to MNPT N/A 3/4 N/A 1/2 N/A 1 1/8 in N/A 1.17 in N/A .75 in N/A 2800 psig N/A 4900 psig N/A 5200 psig
16-2 RB N/A FNPT to MNPT N/A 1 N/A 1/8 N/A 1 3/8 in N/A 1.36 in N/A .94 in N/A 2700 psig N/A 4600 psig N/A 4900 psig
16-4 RB N/A FNPT to MNPT N/A 1 N/A 1/4 N/A 1 3/8 in N/A 1.36 in N/A .94 in N/A 2700 psig N/A 4600 psig N/A 4900 psig
16-6 RB N/A FNPT to MNPT N/A 1 N/A 3/8 N/A 1 3/8 in N/A 1.36 in N/A .94 in N/A 2700 psig N/A 4600 psig N/A 4900 psig
16-8 RB N/A FNPT to MNPT N/A 1 N/A 1/2 N/A 1 3/8 in N/A 1.36 in N/A .94 in N/A 2700 psig N/A 4600 psig N/A 4900 psig
16-12 RB N/A FNPT to MNPT N/A 1 N/A 3/4 N/A 1 3/8 in N/A 1.36 in N/A .94 in N/A 2500 psig N/A 4200 psig N/A 4500 psig
20-12 RB N/A FNPT to MNPT N/A 1 1/4 N/A 3/4 N/A 1 3/4 in N/A 1.47 in N/A .97 in N/A 2000 psig N/A 3500 psig N/A 3700 psig
20-16 RB N/A FNPT to MNPT N/A 1 1/4 N/A 1 N/A 1 3/4 in N/A 1.47 in N/A .97 in N/A 2000 psig N/A 3500 psig N/A 3700 psig
24-16 RB N/A FNPT to MNPT N/A 1 1/2 N/A 1 N/A 2 in N/A 1.58 in N/A 1.00 in N/A 1800 psig N/A 2900 psig N/A 3100 psig
24-20 RB N/A FNPT to MNPT N/A 1 1/2 N/A 1 1/4 N/A 2 in N/A 1.58 in N/A 1.00 in N/A 1700 psig N/A 2700 psig N/A 2800 psig
Unit of Measure
1