Stainless steel (countersunk / flat head) rivet nuts; Countersunk head / flat head pull nail; Hexagon nut / bolt) — what is the national standard number?

Countersunk head hexagon socket: GB70.3  DIN7991

Open round head pull nail: GB12618

Hexagon nut: GB6170  DIN934

External hexagon full thread bolt: GB5783  DIN933

Rivet nut: GB17880.1