Gaytri Industrial Corporation
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End Fittings

END FITTINGS FOR PTFE, THERMOPLASTICS, HYDRAULIC & RUBBER HOSES.
END FITTINGS FOR PTFE, THERMOPLASTICS, HYDRAULIC & RUBBER HOSES
END FITTINGS FOR PTFE, THERMOPLASTICS, HYDRAULIC & RUBBER HOSES

Hose Size & Thread Size Selection Chart For All Types Of Hose

Hose Size inches
 
mm/nw
 
Corresponding Thread
BSP inches
NPT inches
SAE inches
Metric
Stand Pipe
Pipe dia mm
Length mm
NPTF*
Thread Inches
TPI
3/16
4
1/4
1/4
7/16 20 UNF
M 12 x 1.5
M 16 x 1.5
6
8
20
22
1/8
1/4
27
18
1/4
6
1/4
1/4
7/16 20 UNF
1/2   20 UNF
9/16 18 UNF
5/8 18 UNF
M 14 x 1.5
M 16 x 1.5
M 18 x 1.5
8
10
12
22
24
25
1/8
1/4
3/8
27
18
18
5/16
8
3/8
3/8
1/2   20 UNF
9/16 18 UNF
5/8   18 UNF
M 16 x 1.5
M 20 x 1.5
10
12
24
25
1/4
3/8
18
18
3/8
10
3/8
1/2
3/8
1/2
1/2   20 UNF
9/16 18 UNF
3/4 16 UNF
7/8 14 UNF
M 18 x 1.5
M 22 x 1.5
12
14
10
25
27
24
1/4
3/8
1/2
18
18
14
1/2
13
1/2
1/2
9/16 18 UNF
3/4 16 UNF
7/8 14 UNF
11/16 12 UNF
M 22 x 1.5
M 24 x 1.5
M 26 x 1.5
15
16
18
20
25
30
25
32
3/8
1/2
3/4
18
14
14
5/8
16
5/8
3/4
3/4
3/4 16 UNF
7/8 14 UNF
1 1/16 12 UNF
M 26 x 1.5
18
20
25
32
3/4
14
3/4
20
3/4
1
3/4
1
7/8 14 UNF
11/16 12 UNF
13/16 12 UNF
15/16 12 UNF
M 30 x 1.5
M 30 x 2.0
M 36 x 2.0
22
25
25
34
3/4
1
14
111/2
1
25
1
1 1/4
1
1 1/4
1 5/16 12 UNF
1 5/8 12 UNF
M 38 x 1.5
M 42 x 2.0
28
30
25 or
40
36
40
1
111/2
11/4
32
11/4
11/2
11/4
11/2
1 5/8 12 UNF
1 7/8 12 UNF
M 45 x 1.5
M 52 x 1.5
38
30
35
38
35
30
1 1/4
11 1/2
11/2
38
11/2
2
11/2
2
1 7/8 12 UNF
21/4 12 UNF
21/2 12 UNF
M 52 x 1.5
M 52 x 1.5
42
50
36
70
11/4
2
111/2
111/2
2
50
2
21/2
2
21/2
21/2 12 UNF
M 65 x 2.0
-
-
2
111/2
21/2
63
21/2
3
21/2
3
3
M 78 x 2.0
-
-
-
-
3
76
3
3
-
M 100 x 2.0
-
-
-
-

Note: The National Pipe Tapered Thread for fules is a dryseal thread used for both male and female ends. The interface crest and root fit of the mating threads produces the seal. (This thread should not be confused with American Standard NPT thread which does not produce crest and root seal).