Bakin karfe (countersunk / lebur kai) rivet kwayoyi;Countersunk kai / lebur kai ja ƙusa;Hexagon goro / bolt) - menene ma'auni na ƙasa?

Countersunk head hexagon soket: GB70.3 DIN7991

Bude zagaye na cire ƙusa: GB12618

Kwayar hexagon: GB6170 DIN934

Na waje hexagon cikakken zaren bakin ciki: GB5783 DIN933

Nauyin Rivet: GB17880.1