Ungazihlula njani ii-rivet nuts ezincinci ezifakwe kwi-countersunk kwi-rivet nuts ezinkulu ezifakwe kwi-countersunk?

I-rivet nut ene-engile ye-90 ° yintloko enkulu echasene ne-countersunk, ngelixa i-rivet nut ene-engile ye-120 ° yintloko encinci echasene ne-countersunk.

Umahluko phakathi kwezi zimbini:
1. I-engile yentloko yahlukile.
2. Ububanzi bangaphandle bentloko bahlukile.