Parker 51 Series Standpipe Field Attachable Fittings

This page is for reference only. The 51 Series Fittings are now bein phased out and replaced by Series 51R. 

Parker 21D51 Field Attachable Fittings

Standpipe Light Series

Parker 51 series 21D51 field attachable fitting

For available sizes, refer to the table below. 

 


Steel
Part
Number

Tube
O.D.

Hose
I.D.

A

Cutoff
Allow.
B

C

H
Hex

W
Hex

Hose Fitting

mm

inch

inch

mm

inch

mm

inch

mm

mm

mm

21D51-6-3

6

3/16

2.17

55

1.38

35

0.87

22

17

16

21D51-6-6

6

3/8

2.64

67

1.26

32

0.71

18

19

22

21D51-8-4

8

1/4

2.28

58

1.42

36

0.87

22

14

17

21D51-10-5

10

5/16

2.52

64

1.50

38

0.91

23

14

29

21D51-10-6

10

3/8

2.80

71

1.65

42

0.91

23

17

22

21D51-15-8

15

1/2

3.15

80

1.89

48

0.98

25

19

27

21D51-22-12

22

3/4

3.46

88

1.89

48

1.10

28

27

35

21D51-28-16

28

1

4.09

104

2.28

58

1.18

30

32

43


 

Parker 23D51 Field Attachable Fittings

Standpipe Heavy Series

Parker 51 series 23D51 field attachable fitting

For available sizes, refer to the table below. 

 


Steel
Part
Number

Tube
O.D.

Hose
I.D.

A

Cutoff
Allow.
B

C

H
Hex

W
Hex

Hose Fitting

mm

inch

inch

mm

inch

mm

inch

mm

mm

mm

23D51-8-3 (+)

8 (+)

3/16

2.20

56

1.42

36

0.94

24

14

16

23D51-10-4 (+)

10 (+)

1/4

2.28

58

1.42

36

1.02

26

14

17

23D51-12-5 (+)

12 (+)

5/16

2.56

65

1.54

39

1.02

26

14

29

23D51-12-6

12

3/8

2.91

74

1.81

46

1.02

26

17

22

23D51-14-6

14

3/8

3.03

77

1.89

48

1.14

29

17

22

23D51-25-12

25

3/4

4.17

106

2.56

65

1.58

40

27

35

23D51-30-16

30

1

4.65

118

2.83

72

1.73

44

32

43