Parker PTR | Pipe Thread Reducers

This Section contains adapters with thread types including NPT, NPTF, BSPT, BSPP, SAE UN/UNF, and Metric. All the threads in this section are made to industry specifications with conformance shown in table on the right.
Thread Standard

NPT

ANSI B1.20.1, FED-STD-H28/7

NPTF

SAE J476, ANSI B1.20.3, FED-STD-H28/8

BSPT

BS 21, ISO 7/1

BSPP

BS 2779, ISO 228/1

Metric

ISO 261, ANSI B1.13M, FED-STD-H28/21

UN/UNF*

ANSI B1.1, FED-STD-H28/2

*Class 2A or 2B

Parker Pipe Reducer, Expander, & Conversion Configurations

 Parker Pipe Thread Reducer

 

Pipe Thread Reducers

Part #: PTR
Manufacturer: Parker

 

NPTF / NPTF


TUBE
FITTING
PART #

END SIZE

C2
HEX
(in.)

L2
(in.)

Dynamic
Pressure

(x 1,000 PSI)

1
NPTF

2
NPTF

-S

-SS

-B

1/4 x 1/8 PTR

1/4 - 18

1/8 - 27

5/8

0.86

6.0

6.0

3.9

3/8 x 1/8 PTR

3/8 - 18

1/8 - 27

3/4

0.86

6.0

6.0

3.9

3/8 x 1/4 PTR

3/8 - 18

1/4 - 18

3/4

0.86

6.0

6.0

3.9

1/2 x 1/8 PTR

1/2 - 14

1/8 - 27

7/8

1.11

6.0

6.0

3.2

1/2 x 1/4 PTR

1/2 - 14

1/4 - 18

7/8

1.11

6.0

6.0

3.2

1/2 x 3/8 PTR

1/2 - 14

3/8 - 18

7/8

1.11

6.0

6.0

3.2

3/4 x 1/8 PTR

3/4 - 14

1/8 - 27

1 1/8

1.17

5.5

6.0

3.3

3/4 x 1/4 PTR

3/4 - 14

1/4 - 18

1 1/8

1.17

5.5

6.0

3.7

3/4 x 3/8 PTR

3/4 - 14

3/8 - 18

1 1/8

1.17

5.5

6.0

3.7

3/4 x 1/2 PTR

3/4 - 14

1/2 - 14

1 1/8

1.17

5.0

6.0

3.3

1 x 1/8 PTR

1 - 11 1/2

1/8 - 27

1 3/8

1.36

4.5

5.4

3.3

1 x 1/4 PTR

1 - 11 1/2

1/4 - 18

1 3/8

1.36

4.5

5.4

3.3

1 x 3/8 PTR

1 - 11 1/2

3/8 - 18

1 3/8

1.36

4.5

5.4

3.0

1 x 1/2 PTR

1 - 11 1/2

1/2 - 14

1 3/8

1.36

4.5

5.4

3.0

1 x 3/4 PTR

1 - 11 1/2

3/4 - 14

1 3/8

1.36

4.0

4.8

2.7

1 1/4 x 1/4 PTR

1 1/4 - 11 1/2

1/4 - 18

1 3/4

1.47

3.0

3.6

2.3

1 1/4 x 3/8 PTR

1 1/4 - 11 1/2

3/8 - 18

1 3/4

1.47

3.0

3.6

2.3

1 1/4 x 1/2 PTR

1 1/4 - 11 1/2

1/2 - 14

1 3/4

1.47

3.0

3.6

2.3

1 1/4 x 3/4 PTR

1 1/4 - 11 1/2

3/4 - 14

1 3/4

1.47

3.0

3.6

2.3

1 1/4 x 1 PTR

1 1/4 - 11 1/2

1 - 11 1/2

1 3/4

1.47

3.0

3.6

2.3

1 1/2 x 1/4 PTR

1 1/2 - 11 1/2

1/4 - 18

2

1.52

3.0

3.6

2.3

1 1/2 x 3/8 PTR

1 1/2 - 11 1/2

3/8 - 18

2

1.58

3.0

3.6

2.3

1 1/2 x 1/2 PTR

1 1/2 - 11 1/2

1/2 - 14

2

1.58

3.0

3.6

2.3

1 1/2 x 3/4 PTR

1 1/2 - 11 1/2

3/4 - 14

2

1.58

3.0

3.6

2.3

1 1/2 x 1 PTR

1 1/2 - 11 1/2

1 - 11 1/2

2

1.58

3.0

3.6

2.3

1 1/2 x 1 1/4 PTR

1 1/2 - 11 1/2

1 1/4 - 11 1/2

2

1.58

2.5

3.0

1.9

2 x 1/2 PTR

2 - 11 1/2

1/2 - 14

2 1/2

1.75

2.0

2.4

1.5

2 x 3/4

2 - 11 1/2

3/4 - 14

2 1/2

1.75

2.0

2.4

1.5

2 x 1 PTR

2 - 11 1/2

1 - 11 1/2

2 1/2

1.75

2.0

2.4

1.5

2 x 1 1/4 PTR

2 - 11 1/2

1 1/4 - 11 1/2

2 1/2

1.75

2.0

2.4

1.5

2 x 1 1/2 PTR

2 - 11 1/2

1 1/2 - 11 1/2

2 1/2

1.75

2.0

2.4

1.5

 


California Prop 65 Warning WARNING: These products can expose you to chemicals including lead and/or DEHP and/or carbon black, which are known to the State of California to cause cancer or birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov