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 11-16. Bolt and nut bonding or grounding to flat surface.
9/8/98
Structure
Aluminum Alloys
Screw or bolt
and nut plate
Cadmium Plated
Steel
Aluminum Terminal and Jumper
Lock-nut
Cadmium Plated
Steel
Washer A
Cadmium Plated
Steel or Aluminum
Washer B
None
Washer C
Cadmium Plated
Steel or
Aluminum
Magnesium Alloys
Cadmium Plated
Steel
Cadmium Plated
Steel
Magnesium Alloy
None or
Magnesium alloy
Cadmium Plated
Steel or
Aluminum
Steel, Cadmium
Plated
Cadmium Plated
Steel
Cadmium Plated
Steel
Cadmium Plated
Steel
Cadmium
Plated Steel
Cadmium Plated
Steel or
Aluminum
Steel, Corrosion Re-
sisting
Aluminum Alloy
Magnesium Alloy1
Corrosion Resisting Cadmium Plated
Corrosion
Steel or Cadmium
Steel
Resisting Steel
Plated Steel
Tinned Copper Terminal and Jumper
Cadmium Plated
Cadmium Plated
Cadmium Plated
Steel
Steel
Steel
Cadmium
Plated Steel
Aluminum2
Alloy
Cadmium Plated
Steel or
Aluminum
Cadmium
Plated Steel
Steel, Cadmium
Plated
Cadmium Plated
Steel
Cadmium Plated
Steel
Cadmium Plated
Steel
None
Cadmium
Plated Steel
Steel, Corrosion Re
sisting
Corrosion Resisting
Steel or Cadmium
Cadmium Plated
Steel
Corrosion Resisting
Steel
None
Plated Steel
1 Avoid connecting copper to magnesium.
2.Use washers having a conductive finished treated to prevent corrosion, suggest AN960JD10L
Cadmium
Plated Steel
Page 11-78
Par 11-190