Eisen Limited Thread Gauge SPU, SRU series

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Hotline: 0365930441

SPU Series

Steel thread plug gauge for unified threads Coarse

Explanation about series
SPU Series
 

Dimensions

Dimensions
  • UNC (uniform coarse) = indicates the type of thread
  • 3/8 (inch) = thread external diameter
  • 16 (16 threads per inch) = indicates the number of threads per inch
 

 

 

Details of series

Table for unified Thread, Type and Number of thread

Nominal  designation Major diameter Threads per inch Threads per inch
(Series thread)
inch mm UNC UNF UNEF 4 UN 6 UN 8 UN 12 UN 16 UN 20 UN 28 UN 32 UN
No. 0
 
No. 2
 
No. 1
 
0.0600
0.0730
0.0860
1.524
1.854
2.184
 
64
56
80
72
64
                 
 
No. 4
No. 5
No. 3
 
 
0.0990
0.1120
0.1250
2.515
2.845
3.175
48
40
40
56
48
44
                 
No. 6
No. 8
No.10
  0.1380
0.1640
0.1900
3.505
4.166
4.826
32
32
24
40
36
32
                 
 
 
1/4
No.12
 
 
0.2160
 
0.2500
5.486
 
6.350
24
 
20
28
 
28
32
 
32
               
5/16
3/8
7/16
  0.3125
0.3750
0.4375
7.938
9.525
11.113
18
16
14
24
24
20
32
32
28
         
 
16
20
20
 
28
28
 
 
 
32
1/2
9/16
5/8
  0.5000
0.5625
0.6250
12.700
14.288
15.875
13
12
11
20
18
18
28
24
24
       
 
12
16
16
16
 
20
20
 
28
28
32
32
32
 
3/4
 
11/16
 
13/16
0.6875
0.7500
0.8125
17.463
19.050
20.638
 
10
 
 
16
 
24
20
20
      12
12
12
16
 
16
20
 
 
28
28
28
32
32
32
7/8
 
1
 
15/16
 
0.8750
0.9375
1.0000
22.225
23.813
25.400
9
 
8
14
 
12
20
20
20
      12
12
 
16
16
16
  28
28
28
32
32
32
 
1 1/8
 
1 1/16
 
1 3/16
1.0625
1.1250
1.1875
26.988
28.575
30.163
 
7
 
 
12
 
18
18
18
    8
8
8
12
 
12
16
16
16
20
20
20
28
28
28
 
1 1/4
 
1 3/8
 
1 5/16
 
1.2500
1.3125
1.3750
31.750
33.338
34.925
7
 
6
12
 
12
18
18
18
    8
8
8

12
 
16
16
16
20
20
20
28
28
28
 
 
1 1/2
 
1 7/16
 
1 9/16
1.4375
1.5000
1.5625
36.513
38.100
39.688
 
6
 
 
12
 
18
18
18
  6
 
6
8
8
8
12
 
12
16
16
16
20
20
20
28
28
 
 
1 5/8
 
1 3/4
 
1 11/16
 
1.6250
1.6875
1.7500
41.275
42.863
44.450
 
 
5
  18
18
 
  6
6
6
8
8
8
12
12
12
16
16
16
20
20
20
   
 
1 7/8
 
1 13/16
 
1 15/16
1.8125
1.8750
1.9375
46.038
47.625
49.213
        6
6
6
8
8
8
12
12
12
16
16
16
20
20
20
   
2   2.0000 50.800 4 1/2       6 8 12 16 20    
  • Note) Unified screw threads which do not fall under the above category are classified into UNS(special thread)