Which publication would you consult for standards on protrusion of bolts, studs, and screws through self-locking nuts?

Which publication would you consult for standards on protrusion of bolts, studs, and screws through self-locking nuts?

• A. AC 65-75
• B. AC 18-1
• C. AC 27-1
• D. AC 43.13-1B

Answer: (D)

Understanding fastener protrusion limits is about ensuring proper engagement and avoiding interference with surrounding parts. AC 43.13-1B is the FAA reference that provides acceptable methods, techniques, and practices for aircraft inspection and repair, including detailed guidance on fasteners and how they should protrude through self-locking nuts. It sets the criteria used during maintenance to determine whether protrusion is within spec and to ensure the self-locking nut can function correctly without damage or loosening. The other publications cover different topics or broader guidance and don’t provide these specific protrusion standards.

Understanding fastener protrusion limits is about ensuring proper engagement and avoiding interference with surrounding parts. AC 43.13-1B is the FAA reference that provides acceptable methods, techniques, and practices for aircraft inspection and repair, including detailed guidance on fasteners and how they should protrude through self-locking nuts. It sets the criteria used during maintenance to determine whether protrusion is within spec and to ensure the self-locking nut can function correctly without damage or loosening. The other publications cover different topics or broader guidance and don’t provide these specific protrusion standards.