KARASTO: THREAD TABLES
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| Whitworth pipe thread (cylindrical). To DIN 259 (ISO 228) |
| Thread |
G1/8" |
G1/4" |
G3/8" |
G1/2" |
G5/8" |
G3/4" |
G7/8" |
| Thread-Ø mm |
9,728 |
13,157 |
16,662 |
20,955 |
22,911 |
26,441 |
30,201 |
| Core-Ø mm |
8,566 |
11,445 |
14,950 |
18,631 |
20,587 |
24,117 |
27,877 |
Num. of starts 1"
( = 25,4 mm) |
28 |
19 |
19 |
14 |
14 |
14 |
14 |
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| Thread |
G2 1/4" |
G2 3/8" |
G2 1/2" |
G2 3/4" |
G3" |
G3 1/4" |
G3 1/2" |
| Thread-Ø mm |
65,710 |
69,390 |
75,184 |
81,534 |
87,884 |
93,980 |
100,330 |
| Core-Ø mm |
62,752 |
66,440 |
72,226 |
78,577 |
84,926 |
91,022 |
97,372 |
Num. of starts 1"
( = 25,4 mm) |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
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| Thread |
G1" |
G11/8" |
G1 1/4" |
G1 3/8" |
G1 1/2" |
G1 3/4" |
G 2" |
| Thread-Ø mm |
33,249 |
37,897 |
41,910 |
44,323 |
47,803 |
53,746 |
59,614 |
| Core-Ø mm |
30,291 |
34,939 |
38,952 |
41,365 |
44,845 |
50,788 |
56,656 |
Num. of starts 1"
( = 25,4 mm) |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
| |
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| Thread |
G3 3/4" |
G4" |
G4 1/2" |
G5" |
G5 1/2" |
G6" |
|
| Thread-Ø mm |
106,680 |
113,030 |
125,730 |
138,430 |
151,130 |
163,830 |
|
| Core-Ø mm |
103,722 |
110,072 |
122,772 |
135,472 |
148,172 |
160,872 |
|
Num. of starts 1"
( = 25,4 mm) |
11 |
11 |
11 |
11 |
11 |
11 |
|
| Whitworth pipe thread (conical). To DIN 2999 (ISO 7/1) Rp-R BS 21 (BSP-BSPT) |
| Thread |
R1/8" |
R1/4" |
R3/8" |
R1/2" |
R5/8" |
R3/4" |
R7/8" |
| Thread-Ø mm |
9,728 |
13,157 |
16,662 |
20,955 |
22,911 |
26,441 |
30,201 |
| Core-Ø mm |
8,566 |
11,445 |
14,950 |
18,631 |
20,587 |
24,117 |
27,877 |
Num. of starts 1"
( = 25,4 mm) |
28 |
19 |
19 |
14 |
14 |
14 |
14 |
| |
|
|
|
|
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|
| Thread |
R2 1/4" |
R2 3/8" |
R2 1/2" |
R2 3/4" |
R3" |
R3 1/4" |
R3 1/2" |
| Thread-Ø mm |
65,710 |
69,390 |
75,184 |
81,534 |
87,884 |
93,980 |
100,330 |
| Core-Ø mm |
62,752 |
66,440 |
72,226 |
78,577 |
84,926 |
91,022 |
97,372 |
Num. of starts 1"
( = 25,4 mm) |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
| |
|
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|
| Thread |
R1" |
R1 1/8" |
R1 1/4" |
R1 3/8" |
R1 1/2" |
R1 3/4" |
R2" |
| Thread-Ø mm |
33,249 |
37,897 |
41,910 |
44,323 |
47,803 |
53,746 |
59,614 |
| Core-Ø mm |
30,291 |
34,939 |
38,952 |
41,365 |
44,845 |
50,788 |
56,656 |
Num. of starts 1"
( = 25,4 mm) |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
| |
|
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| Thread |
R3 3/4" |
R4" |
R4 1/2" |
R5" |
R5 1/2" |
R6" |
|
| Thread-Ø mm |
106,680 |
113,030 |
125,730 |
138,430 |
151,130 |
163,830 |
|
| Core-Ø mm |
103,722 |
110,072 |
122,772 |
135,472 |
148,172 |
160,872 |
|
Num. of starts 1"
( = 25,4 mm) |
11 |
11 |
11 |
11 |
11 |
11 |
|
| American pipe thread NPT (conical). To ASA B 2.1 |
| Thread |
1/8"NPT |
1/4"NPT |
3/8"NPT |
1/2"NPT |
3/4"NPT |
1"NPT |
11/4"NPT |
| Thread-Ø mm |
10,287 |
13,716 |
17,145 |
21,336 |
26,670 |
33,401 |
42,164 |
Num. of starts 1"
( = 25,4 mm) |
27 |
18 |
18 |
14 |
14 |
11 1/2 |
11 1/2 |
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| Thread |
11/2"NPT |
2"NPT |
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| Thread-Ø mm |
48,260 |
60,325 |
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Num. of starts 1"
( = 25,4 mm) |
11 1/2 |
11 1/2 |
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