Category Archives: Uncategorized
US Threads Per Inch Table
Bolt Size
Threads Per Inch (TPI)
Coarse Thread
UNC
Fine Thread
UNF
#0000
-
160
#000
-
120
#00
-
90
#0
-
80
#1
64
72
#2
56
64
#3
48
56
#4
40
48
#5
40
44
#6
32
40
#8
32
36
#10
24
32
#12
24
28
1/4"
20
28
5/16"
18
24
3/8"
16
24
7/16"
14
20
1/2"
13
20
9/16"
12
18
5/8"
11
18
3/4"
10
16
7/8"
9
14
1"
8
12*
1-1/8"
7
12
1-1/4"
7
12
1-1/2"
6
12
* 12tpi is the UNF standard however 14tpi is far more common in actual use.
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Walk Through the Pressure Aging Process with Pavement Interactive
https://pavementinteractive.org/reference-desk/testing/binder-tests/pressure-aging-vessel/
Pavement Interactive explains the Aging Process using the 9300 PAV and 9900 VDO. https://pavementinteractive.org/reference-desk/testing/binder-tests/pressure-aging-vessel/…