ASME B18.31.3 Standard Dimensions for Threaded rods, inch series
Threaded rods
Threaded rods are normally produced in, but not limited to, 3-ft, 6-ft, 10-ft and 12-ft. The length of the threaded rods shall be mesured, overall, from end to end. The length tolerance for nominal lengths of 6-ft and longer is ± 1/2 in. and ± 1/4 in. for lengths less than 6 ft. Associated to this category there are also the following products: Carbon Steel Threaded Rods Plain Finish & Zinc Plated; Carbon Steel Hot Dip Galvanized Threaded Rods; Carbon Steel ACME Threaded Rods; Fully threaded Carbon Steel Threaded Studs; ASTM A193 B7; ASTM A320 L7 Threaded Rods Alloy Steel Bolting Material for Low-Temperature Service; ASTM A320 L7 Threaded Studs; ASTM A193 B16 Threaded Rods a heat-treated chromium-molybdenum-vanadium steel for high-pressure, high-temperature service; Stainless Steel Threaded Rods; ASTM A449 Threaded Rods Quenched and Tempered Steel; ASTM A242 Threaded Rods High-Strength Low-Alloy Structural Steel.
Dimensional Drawing and Technical Diagrams
Key Dimensions and Technical Parameters
|
Dimensions in inches (1 inch=25.4 mm) - source ASME B18.31.3 Publication date: 2009 |
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|
d thread size
|
UNC
|
UNF
|
|
| Nr. of threads x inch | Nr. of threads x inch | ||
|
Nr° 0
|
64
|
80
|
|
|
Nr° 1
|
56
|
72
|
|
|
Nr° 2
|
48
|
64
|
|
|
Nr° 3
|
40
|
56
|
|
|
Nr° 4
|
40
|
48
|
|
|
Nr° 5
|
32
|
44
|
|
|
Nr° 6
|
32
|
40
|
|
|
Nr° 8
|
24
|
36
|
|
|
Nr° 10
|
24
|
32
|
|
|
Nr° 12
|
20
|
28
|
|
|
1/4
|
18
|
28
|
|
|
5/16
|
16
|
24
|
|
|
3/8
|
14
|
24
|
|
|
7/16
|
13
|
20
|
|
|
1/2
|
12
|
20
|
|
|
9/16
|
11
|
18
|
|
|
5/8
|
10
|
18
|
|
|
3/4
|
9
|
16
|
|
|
7/8
|
8
|
14
|
|
|
1
|
7
|
12
|
|
|
1 1/8
|
7
|
12
|
|
|
1 1/4
|
6
|
12
|
|
|
1 3/8
|
6
|
12
|
|
|
1 1/2
|
6
|
12
|
|
|
1 3/4
|
5
|
- | |
|
2
|
4.5
|
- | |
|
2 1/4
|
4.5
|
-
|
|
|
2 1/2
|
4
|
-
|
|
|
2 3/4
|
4
|
-
|
|
|
3
|
4
|
-
|
|
|
3 1/4
|
4
|
-
|
|
|
3 1/2
|
4
|
-
|
|
|
3 3/4
|
4
|
-
|
|
|
4
|
4
|
- | |