FAA Aviation Mechanic Airframe (AMA)Airframe StructuresEasy
A technician is selecting a protruding-head solid rivet for a general repair on an aluminum skin where head style is not critical. The rivet has a smooth, dome-shaped head that is flatter than the old round-head style. Which AN rivet designation describes this head style?
- AAN426 countersunk head
- BAN441 flat head
- CAN470 universal head
- DAN455 round head
Show answer & explanationAnswer & explanation
Correct answer: C. AN470 universal head
The AN470 universal head rivet has a low, flat dome shape and has replaced the round-head (AN430) and brazier-head rivets for most general sheet metal repair work. AN426 is a flush (countersunk) rivet, AN455 is the older round-head style, and AN441 is a flat-head rivet used mainly on internal structure.
Why the other options are wrong
- A. AN426 is a flush 100° countersunk rivet, not a protruding dome-shaped head.
- B. AN441 flat head has an almost flat top, not a dome shape.
- D. AN455 round head is an older style largely replaced by the AN470.
AN470 Universal Head Rivet
A solid aluminum rivet with a low dome-shaped head used for the majority of protruding-head sheet metal repairs.
- Replaced round-head (AN430) and brazier-head rivets in most applications
- Head shape is a low, flat dome
- Identified by shank diameter and length codes stamped after AN470
Memory trick: 'Universal' rivets Uniformly replace old round heads.