Parker HHP | Hollow Hex Pipe Plugs

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 Port & Bleed Adapter Configurations

 Parker Hollow Hex Pipe Plug

 

Hollow Hex Pipe Plugs

Part #: HHP
Manufacturer: Parker

 

NPTF


TUBE
FITTING
PART #

END SIZE

B
(in.)

C5 INTERNAL
HEX
(in.)

Dynamic
Pressure
(x 1,000 PSI)

1
NPTF

-S

-SS

-B

1/16 HHP

1/16 - 27

0.30

5/32

6.0

7.2

3.3

1/8 HHP

1/8 - 27

0.30

3/16

6.0

7.2

3.9

1/4 HHP

1/4 - 18

0.46

1/4

6.0

7.2

3.9

3/8 HHP

3/8 - 18

0.46

5/16

6.0

7.2

3.3

1/2 HHP

1/2 - 14

0.61

3/8

6.0

7.2

3.3

3/4 HHP

3/4 - 14

0.62

9/16

5.5

6.6

3.3

1 HHP

1 - 11 1/2

0.77

3/4

4.5

5.4

3.3

1 1/4 HHP

1 1/4 - 11 1/2

0.77

3/4

3.0

5.0

3.3

1 1/2 HHP

1 1/2 - 11 1/2

0.83

3/4

3.0

3.0

1.9

2 HHP

2 - 11 1/2

0.86

3/4

2.0

2.5

1.6