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Lubrication rule for the torque table

Aviation Mechanic General (AMG) practice question 25 of 33 on Aircraft Materials, Hardware, and Processes. ACS element AM.I.E.K8 · difficulty: recall. Want to answer it in a timed quiz? Use the Aviation Mechanic General (AMG) practice mode.

Question bank updated 2026-09-22

QUESTIONUnder the rules for using the standard torque table, for which parts may nuts and bolts be lubricated when no specific instruction calls for it?

  1. ACorrosion-resistant steel parts
  2. BCadmium-plated steel parts in tension
  3. CAll parts, to make the torque readings consistent
Show the answer and explanation

Correct answer: A. Corrosion-resistant steel parts

  • A — correct The rule is not to lubricate nuts or bolts except for corrosion-resistant steel parts or where specifically instructed to do so.
  • B — incorrect The standard torque values apply to unlubricated cadmium-plated steel nuts. These parts are not lubricated unless specifically instructed.
  • C — incorrect Lubrication is the exception, not the rule. Unspecified lubrication changes the relationship between wrench reading and fastener load.

BACKGROUND

The standard torque table is used as a guide whenever specific torque values are not called out in maintenance procedures. Its rules include converting inch-pounds to foot-pounds by dividing by 12, tightening by rotating the nut first when possible, and using maximum torque ranges only when the materials being joined are of sufficient thickness, area, and strength. Nuts and bolts are not lubricated except for corrosion-resistant steel parts or where specifically instructed. The table's torque loads apply to unlubricated cadmium-plated steel nuts of the fine or coarse thread series, and they do not apply where the maintenance manual specifies special torque requirements.

STUDY TIP

Default to dry threads; lubricate only corrosion-resistant steel parts or when the instructions say so.

KEY POINTS

  • Do not lubricate nuts or bolts unless they are corrosion-resistant steel or instructions require it.
  • Standard torque values are for unlubricated cadmium-plated steel nuts.
  • Manufacturer-specified torque values override the standard table.

SOURCES

  • FAA-H-8083-30B ch07 "Torque Tables"
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SkyDrill is not affiliated with the FAA. This is an original practice item based on FAA-H-8083-30B Aviation Maintenance Technician Handbook – General, 14 CFR part 43 and part 65. Regulations and handbooks are revised; confirm details against the current edition.