At 12:30 PM 9/27/2009, Tom Hargrave wrote... >Lug nut & log bolt torque values are based on threads lubricated with >light >machine oil. Torque specifications are given for clean, dry threads unless otherwise specified. That's true for SAE, DIN, and JIS standards, as well as the aviation industry. Example: "Be sure the bolt and nut threads are clean and dry, unless otherwise specified by the manufacturer." (FAA AC 43.13-1B, 7-40b) SAE J1701M specifies torque reduced by ~25% for lubricated fasteners. |
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