|
ASTM A320
Continuous Stud Bolts-NINGBO BOLT |
ASTM A320 Continuous Stud Bolts
|
Dimensions for Continuous Thread Studs |
|
Nominal Size |
Diameter,D |
Threads Per Inch |
Chamfered Thread Distance, U |
|
UNC |
UNF |
8UN |
UNC |
UNF |
8UN |
|
Max |
Min |
Max |
Min |
Max |
Min |
|
1/4 |
0.2500 |
20 |
28 |
... |
0.100 |
0.050 |
0.071 |
0.036 |
... |
... |
|
5/16 |
0.3125 |
18 |
24 |
... |
0.111 |
0.056 |
0.083 |
0.042 |
... |
... |
|
3/8 |
0.3750 |
16 |
24 |
... |
0.125 |
0.063 |
0.083 |
0.042 |
... |
... |
|
7/16 |
0.4375 |
14 |
20 |
... |
0.143 |
0.072 |
0.100 |
0.050 |
... |
... |
|
1/2 |
0.5000 |
13 |
20 |
... |
0.154 |
0.077 |
0.100 |
0.050 |
... |
... |
|
9/16 |
0.5625 |
12 |
18 |
... |
0.167 |
0.084 |
0.111 |
0.056 |
... |
... |
|
5/8 |
0.6250 |
11 |
18 |
... |
0.182 |
0.091 |
0.111 |
0.056 |
... |
... |
|
3/4 |
0.7500 |
10 |
16 |
... |
0.200 |
0.100 |
0.125 |
0.063 |
... |
... |
|
7/8 |
0.8750 |
9 |
14 |
... |
0.222 |
0.111 |
0.143 |
0.072 |
... |
... |
|
1 |
1.0000 |
8 |
12 |
... |
0.250 |
0.125 |
0.167 |
0.084 |
... |
... |
|
1-1/8 |
1.1250 |
7 |
12 |
8 |
0.286 |
0.143 |
0.167 |
0.084 |
0.250 |
0.125 |
|
1-1/4 |
1.2500 |
7 |
12 |
8 |
0.286 |
0.143 |
0.167 |
0.084 |
0.250 |
0.125 |
|
1-3/8 |
1.3750 |
6 |
12 |
8 |
0.333 |
0.167 |
0.167 |
0.084 |
0.250 |
0.125 |
|
1-1/2 |
1.5000 |
6 |
12 |
8 |
0.333 |
0.167 |
0.167 |
0.084 |
0.250 |
0.125 |
|
1-5/8 |
1.6250 |
... |
... |
8 |
... |
... |
... |
... |
0.250 |
0.125 |
|
1-3/4 |
1.7500 |
5 |
... |
8 |
0.400 |
0.200 |
... |
... |
0.250 |
0.125 |
|
1-7/8 |
1.8750 |
... |
... |
8 |
... |
... |
... |
... |
0.250 |
0.125 |
|
2 |
2.0000 |
4-1/2 |
... |
8 |
0.444 |
0.222 |
... |
... |
0.250 |
0.125 |
|
2-1/4 |
2.2500 |
4-1/2 |
... |
8 |
0.444 |
0.222 |
... |
... |
0.250 |
0.125 |
|
2-1/2 |
2.5000 |
4 |
... |
8 |
0.500 |
0.250 |
... |
... |
0.250 |
0.125 |
|
2-3/4 |
2.7500 |
4 |
... |
8 |
0.500 |
0.250 |
... |
... |
0.250 |
0.125 |
|
3 |
3.0000 |
4 |
... |
8 |
0.500 |
0.250 |
... |
... |
0.250 |
0.125 |
|
3-1/4 |
3.2500 |
4 |
... |
8 |
0.500 |
0.250 |
... |
... |
0.250 |
0.125 |
|
3-1/2 |
3.5000 |
4 |
... |
8 |
0.500 |
0.250 |
... |
... |
0.250 |
0.125 |
|
3-3/4 |
3.7500 |
4 |
... |
8 |
0.500 |
0.250 |
... |
... |
0.250 |
0.125 |
|
4 |
4.0000 |
4 |
... |
8 |
0.500 |
0.250 |
... |
... |
0.250 |
0.125 |
GENERAL PURPOSE STUDS (END-TO-END)
LENGTH
The length of stud, measured parallel to the axis, is the distance from extreme
end to extreme end. The
tolerance on length shall be tabulated below:
|
Nominal Stud Size in. |
Tolerance on Length, in. |
|
Dia. |
For Lengths 6 in. and Shorter |
For Lengths Over 6 in. |
|
To 5/16 |
+/- 0.03 |
+/- 0.06 |
|
over 5/16 to 3/4 |
+/- 0.06 |
+/- 0.12 |
|
over 3/4 to 1-1/4 |
+/- 0.12 |
+/- 0.19 |
|
over 1-1/4 |
+/- 0.25 |
+/- 0.25 |
STUD BOLTS FOR PRESSURE-TEMPERATURE PIPING (FIRST TO
FIRST)
LENGTH-FIRST TO FIRST
The length of stud bolt, measured parallel to the axis, is the distance from
first thread to first thread. First thread is defined as the intersection of the
major diameter of the thread with the base of the point. Stud bolts are normally
available in 1/4 in. length increments. Length tolerances, all stud bolt sizes,
shall be as tabulated below:
|
Length, In. |
Length Tolerance, In. |
|
to 12 |
+/- 0.062 |
|
over 12 to 18 |
+/- 0.125 |
|
over 18 |
+/- 0.250 |
|
