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Fastener Torque Recommendations
Listed below are the recommended torque values for most ARP fasteners. Recommended torque value is 75% of the fastener's yield strength.
THE TORQUE VALUES REPRESENTED ON THIS PAGE ARE INTENDED TO BE FOR GENERAL INFORMATION, NOT FOR SPECIFIC INSTALLATIONS!
In special instances where supplied instructions deviate from the torque values listed here, always go with the enclosed instructions. Stud torque values are based upon coarse thread yield strength and torque being applied to the fine thread. (Example: a 7/16"-14 in the block and a 7/16"-20 threaded nut).
Recommended Torque to Achieve Optimum Preload (clamping force) Using ARP Moly Assembly Lubricant or 30-wt oil
Torque = (ft/lbs.), Preload = (lbs.)
NOTE: For those using Newton/meters as a torquing reference, you must multipy the appropriate ft/lbs. factor by 1.356
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Thread Size and Type
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Fastener Tensile Strength (PSI)
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170,000 (1171N/mm²)
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190,000 (1309 N/mm²)
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220,000 (1515N/mm²)
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Torque w/30wt oil
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Torque w/ARP Moly
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Preload
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Torque w/30wt oil
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Torque w/ARP Moly
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Preload
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Torque w/30wt oil
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Torque w/ARP Moly
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Preload
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| 1/4" Stud |
12 |
10 |
3,804 |
14 |
11 |
4,280 |
15 |
12 |
4,755 |
| 1/4-20 |
13 |
10 |
3,804 |
14 |
11 |
4,280 |
16 |
13 |
4,755 |
| 1/4-28 |
14 |
11 |
4,344 |
16 |
13 |
4,887 |
18 |
14 |
5,430 |
| 5/16" Stud |
25 |
20 |
6,264 |
28 |
22 |
7,047 |
32 |
25 |
7,830 |
| 5/16-18 |
26 |
21 |
6,264 |
29 |
23 |
7,047 |
32 |
26 |
7,830 |
| 5/16-24 |
28 |
22 |
6,948 |
32 |
25 |
7,817 |
35 |
28 |
8,685 |
| 3/8" Stud |
45 |
35 |
9,276 |
50 |
39 |
10,436 |
56 |
44 |
11,595 |
| 3/8-16 |
46 |
36 |
9,276 |
51 |
41 |
10,436 |
57 |
45 |
11,595 |
| 3/8-24 |
50 |
39 |
10,512 |
57 |
44 |
11,826 |
63 |
49 |
13,140 |
| 7/16" Stud |
71 |
56 |
12,720 |
80 |
63 |
14,310 |
89 |
70 |
15,900 |
| 7/16-14 |
73 |
58 |
12,720 |
82 |
65 |
14,310 |
91 |
72 |
15,900 |
| 7/16-20 |
80 |
62 |
14,220 |
90 |
70 |
15,998 |
100 |
78 |
17,775 |
| 1/2" Stud |
108 |
84 |
16,992 |
122 |
95 |
19,116 |
135 |
105 |
21,240 |
| 1/2-13 |
111 |
88 |
16,992 |
125 |
99 |
19,116 |
138 |
110 |
21,240 |
| 1/2-20 |
122 |
95 |
19,164 |
137 |
107 |
21,560 |
152 |
119 |
23,995 |
| 9/16" Stud |
156 |
122 |
21,792 |
175 |
137 |
24,516 |
195 |
152 |
27,240 |
| 9/16-12 |
159 |
126 |
21,792 |
179 |
142 |
24,516 |
199 |
158 |
27,240 |
| 9/16-18 |
174 |
136 |
24,312 |
196 |
153 |
27,351 |
217 |
170 |
30,390 |
| 5/8" Stud |
214 |
167 |
27,072 |
241 |
187 |
30,456 |
268 |
208 |
38,840 |
| 5/8-11 |
220 |
174 |
27,072 |
247 |
196 |
30,456 |
275 |
217 |
38,840 |
| 5/8-18 |
243 |
189 |
30,660 |
273 |
212 |
34,493 |
303 |
236 |
38,325 |
| 10mm Stud |
54 |
42 |
10,680 |
61 |
48 |
12,015 |
68 |
53 |
13,350 |
| 11mm Stud |
80 |
63 |
14,220 |
90 |
71 |
15,998 |
100 |
79 |
17,775 |
| 12mm Stud |
97 |
77 |
15,540 |
109 |
86 |
17,483 |
122 |
96 |
19,425 |
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