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Whitworth Pipe Thread DIN/ISO 228

Standard ISO Hardware
Fastening Joining Assembly

All dimensional data given in mm (millimeters)

Whitworth Pipe Thread Section View DIN ISO 228

Nominal
Diameter
Major
Diameter
Minor Diamter
Nut
Tapping
Drill Size
Threads per Inch
Pitch
G 1/8"
9,73
8,85
8,80
28
0,907
G 1/4"
13,16
11,89
11,80
19
1,337
G 3/8"
16,66
15,39
15,25
19
1,337
G 1/2"
20,95
19,17
19,00
14
1,814
G 5/8"
22,91
21,13
21,00
14
1,814
G 3/4"
26,44
24,66
24,50
14
1,814
G 7/8"
30,20
28,42
28,25
14
1,814
G 1"
33,25
30,93
30,75
11
2,309
G 1 1/8"
37,90
35,58
35,30
11
2,309
G 1 1/4"
41,91
39,59
39,25
11
2,309
G 1 3/8"
44,32
42,00
41,70
11
2,309
G 1 1/2"
47,80
45,48
45,25
11
2,309
G 1 3/4"
53,74
51,43
51,10
11
2,309
G 2"
59,61
57,29
57,00
11
2,309
G 2 1/4"
65,71
63,39
63,10
11
2,309
G 2 1/2"
75,18
72,86
72,60
11
2,309
G 2 3/4"
81,53
79,21
78,90
11
2,309
G 3"
87,88
85,56
85,30
11
2,309
G 3 1/4"
93,98
91,66
91,50
11
2,309
G 3 1/2"
100,33
98,01
97,70
11
2,309
G 3 3/4"
106,68
104,30
104,00
11
2,309
G 4"
113,03
110,71
110,40
11
2,309

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