Parker 51 Series SAE Field Attachable Fittings

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

Parker 20651 Field Attachable Hose Fittings

Male SAE (JIC) 37° Swivel

Parker 51 series 20651 fitting

For available sizes, refer to the table below. 


Steel
Part
Number

Thread
Size

Hose
I.D.

A

Cutoff
Allow.
B

H, J
Hex

W
Hex

Hose Fitting

 

inch

inch

mm

inch

mm

inch

inch

20651-4-3

7/16-20

3/16

1.99

51

1.25

32

9/16

5/8

20651-4-4

7/16-20

1/4

2.18

55

1.25

32

9/16

5/8

20651-5-4

1/2-20

1/4

2.24

57

1.44

37

5/8

5/8

20651-6-4

9/16-18

1/4

2.34

59

1.44

37

11/16

5/8

20651-6-5

9/16-18

5/16

2.37

60

1.50

38

11/16

3/4

20651-6-6

9/16-18

3/8

2.74

70

1.44

37

11/16

7/8

20651-8-6

3/4-16

3/8

2.88

73

1.63

41

7/8

7/8

20651-8-8

3/4-16

1/2

3.25

83

1.75

44

7/8

1-1/16

20651-10-8

7/8-14

1/2

3.37

86

1.88

48

1

1-1/16

20651-12-12

1-1/16-12

3/4

3.75

95

2.13

54

1-1/4

1-3/8

20651-16-16

1-5/16-12

1

3.93

100

2.44

62

1-1/2

1-9/16

 NOTE: Sizes -4, -5, -8 and -10 incorporate a dual seat.

 

Parker 20851 Field Attachable Hose Fittings

SAE 45° Swivel

Parker 51 series 20851 fitting

For available sizes, refer to the table below. 


Steel
Part
Number

Thread
Size

Tube
O. D.

Hose
I.D.

A

Cutoff
Allow.
B

H, J
Hex

W
Hex

Hose Fitting

 

inch

inch

inch

mm

inch

mm

inch

inch

20851-6-6

5/18-18

3/8

3/8

2.82

72

1.56

40

3/4

7/8

 

How to Order