Products - Lead Screws - Unified National V

Unified National Threaded Rods

Precision rolled UN V threads have a 2A thread fit (3A upon request). The lead error over the length of the rod is 0.003" maximum per foot.

Thread
Name
Thread
Size
Threads
per Inch
Thread
Series
Thread
Class
Thread
Lead
Numbered Unified National Threads
#4-40 UNC 2A
#4
40
UNC
2A
.0250
#4-36 UNS 2A
#4
36
UNS
2A
.0278
#5-40 UNC 2A
#5
40
UNC
2A
.0250
#6-40 UNF 2A
#6
40
UNF
2A
.0250
#6-36 UNS 2A
#6
36
UNS
2A
.0278
#6-32 UNC 2A
#6
32
UNC
2A
.0313
#8-40 UNS 2A
#8
40
UNS
2A
.0250
#8-36 UNF 2A
#8
36
UNF
2A
.0278
#8-32 UNC 2A
#8
32
UNC
2A
.0313
#10-40 UNS 2A
#10
40
UNS
2A
.0250
#10-32 UNF 2A
#10
32
UNF
2A
.0313
Fractional Unified National Threads
1/4-40 UNS 2A
1/4
40
UNS
2A
.0250
1/4-36 UNS 2A
1/4
36
UNS
2A
.0278
1/4-32 UNEF 2A
1/4
32
UNEF
2A
.0313
1/4-28 UNF 2A
1/4
28
UNF
2A
.0357
1/4-24 UNS 2A
1/4
24
UNS
2A
.0417
1/4-20 UNC 2A
1/4
20
UNC
2A
.0500
9/32-40 UNS 2A
9/32
40
UNS
2A
.0250
9/32-32 UNS 2A
9/32
32
UNS
2A
.0313
5/16-40 UNS 2A
5/16
40
UNS
2A
.0250
5/16-36 UNEF 2A
5/16
36
UNEF
2A
.0278
5/16-24 UNF 2A
5/16
24
UNF
2A
.0417
5/16-20 UN 2A
5/16
20
UN
2A
.0500
5/16-18 UNC 2A
5/16
18
UNC
2A
.0556
3/8-40 UNS 2A
3/8
40
UNS
2A
.0250
3/8-32 UNEF 2A
3/8
32
UNEF
2A
.0313
3/8-24 UNF 2A
3/8
24
UNF
2A
.0417
3/8-20 UN 2A
3/8
20
UN
2A
.0500
3/8-16 UNC 2A
3/8
16
UNC
2A
.0625
7/16-20 UNS 2A
7/16
20
UNS
2A
.0500
7/16-14 UNS 2A
7/16
14
UNS
2A
.0714
7/16-12 UNS 2A
7/16
12
UNS
2A
.0833
1/2-40 UNS 2A
1/2
40
UNS
2A
.0250
1/2-20 UNF 2A
1/2
20
UNF
2A
.0500
1/2-13 UNC 2A
1/2
13
UNC
2A
.0769
9/16-24 UNS 2A
9/16
24
UNS
2A
.0417
9/16-20 UNS 2A
9/16
20
UNS
2A
.0500
9/16-18 UNS 2A
9/16
18
UNS
2A
.0556
9/16-12 UNS 2A
9/16
12
UNS
2A
.0833
5/8-20 UN 2A
5/8
20
UN
2A
.0500
5/8-18 UNF 2A
5/8
18
UNF
2A
.0556
5/8-11 UNC 2A
5/8
11
UNC
2A
.0909

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