Metric
| Types AB,B,BT & Y |
|
Application Test Plates for Types AB,B,BT & Y |
| Screw Size |
Minimum Torsional Load |
Screw Size |
Plate Thickness |
Hole Diameter |
| mm |
No. |
Nm |
lbf in |
mm |
No. |
mm |
in. |
mm |
in. |
| 2.2 |
2 |
0.49 |
4 |
2.2 |
2 |
1.22 |
0.048 |
1.93 |
0.076 |
| 2.9 |
4 |
1.47 |
13 |
2.9 |
4 |
1.22 |
0.048 |
2.44 |
0.096 |
| 3.5 |
6 |
2.74 |
24 |
3.5 |
6 |
2.03 |
0.08 |
2.95 |
0.116 |
| 4.2 |
8 |
4.41 |
39 |
4.2 |
8 |
2.03 |
0.08 |
3.46 |
0.136 |
| 4.8 |
10 |
6.27 |
56 |
4.8 |
10 |
3.18 |
0.125 |
4.05 |
0.159 |
| 5.5 |
12 |
10.78 |
88 |
5.5 |
12 |
3.18 |
0.125 |
4.75 |
0.188 |
| 6.3 |
14 |
15.98 |
142 |
6.3 |
14 |
4.75 |
0.187 |
5.5 |
0.217 |
| 7 |
16 |
34.71 |
290 |
7 |
16 |
4.75 |
0.187 |
6.91 |
0.272 |
Inch
| Unified Threads Types D & T |
|
Application Test Plates for Types D & T |
| Screw Size |
Minimum Torsional Load |
Screw Size |
Plate Thickness |
Hole Diameter |
| No. |
Threads per Inch |
lbf in |
No. |
Threads per Inch |
mm |
in. |
mm |
in. |
| 4 |
40 |
13 |
4 |
40 |
2.77 |
0.109 |
2.4 |
0.096 |
| 4 |
48 |
15 |
4 |
48 |
2.77 |
0.109 |
2.44 |
0.096 |
| 6 |
32 |
23 |
6 |
32 |
3.58 |
0.141 |
3.05 |
0.12 |
| 6 |
40 |
27 |
6 |
40 |
3.58 |
0.141 |
3.05 |
0.12 |
| 8 |
32 |
42 |
8 |
32 |
3.58 |
0.141 |
3.74 |
0.147 |
| 8 |
36 |
47 |
8 |
36 |
3.58 |
0.141 |
3.74 |
0.147 |
| 10 |
24 |
56 |
10 |
24 |
4.75 |
0.187 |
4.4 |
0.173 |
| 10 |
32 |
74 |
10 |
32 |
4.75 |
0.187 |
4.5 |
0.177 |
| 1/4" |
20 |
140 |
1/4" |
20 |
6.35 |
0.25 |
5.79 |
0.228 |
| 1/4" |
28 |
179 |
1/4" |
28 |
6.35 |
0.25 |
5.94 |
0.234 |
| 5/16" |
18 |
306 |
5/16" |
18 |
7.92 |
0.312 |
7.36 |
0.29 |
| 5/16" |
24 |
370 |
5/16" |
24 |
7.92 |
0.312 |
7.5 |
0.295 |
The minimum torsional loads shown for unified sizes are based on BS 1580, an imperial units standard
Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.