FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 11. Aircraft Electrical Systems | 15. Grounding and Bonding | 11-190. Creepage Distance
AC 43.13-1B
TABLE 11-14. Stud bonding or grounding to flat surface.
9/8/98
Structure
Aluminum
Alloys
Screw or
Bolt and
Lock nut
Cadmium
Plated steel
Aluminum Terminal and Jumper
Plain nut
Cadmium
Plated Steel
Washer
A
Aluminum
Alloy
Washer
B
Aluminum
Alloy
Washer
C & D
Cadmium
Plated Steel or
Aluminum
Lock
washer E
Cadmium
Plated Steel
Lock
washer F
Cadmium
Plated Steel
Magnesium
Alloys
Cadmium
Plated Steel
Cadmium
Plated Steel
Magnesium
Alloy
Magnesium
Alloy
Cadmium
Plated Steel or
Aluminum
Cadmium
Plated Steel
Cadmium
Plated Steel
Steel, Cadmium
Plated
Cadmium
Plated Steel
Cadmium
Plated Steel
None
None
Cadmium
Plated Steel or
Aluminum
Cadmium
Plated Steel
Cadmium
Plated Steel
Steel, Corrosion
Resisting
Corrosion Re
sisting Steel
Aluminum
Alloys
Cadmium
Plated Steel
Cadmium
None
None
Cadmium
Plated Steel
Plated Steel or
Aluminum
Tinned Copper Terminal and Jumper
Cadmium
Aluminum
Aluminum
Cadmium
Plated Steel
Alloy
Alloy
Plated Steel
Corrosion
Resist Steel
Cadmium
Plated Steel
Cadmium
Plated Steel
Cadmium
Plated Steel
or Aluminum
Magnesium
Alloys1
Steel, Cadmium
Plated
Cadmium
Plated Steel
Cadmium
Plated Steel
None
None
Cadmium
Plated Steel
Cadmium
Plated Steel
Cadmium
Plated Steel
Steel, Corrosion
Resisting
Corrosion Re
sisting Steel
Corrosion
Resisting Steel
1 Avoid connecting copper to magnesium.
None
None
Cadmium
Plated Steel
Corrosion
Resisting
Steel
Corrosion
Resisting
Steel
Page 11-76
Par 11-190