O a suega ma'a'a o lo'o iai mo rivets tauaso?

O suega masani o le ma'a'a e aofia ai: Rockwell Hardness (HR), Surface Rockwell Hardness (HR), Vickers Hardness (HV), Micro Vickers Hardness (HV), Knoop Hardness (HK), Brinell Hardness (HB), Leeb hardness (HL) (metotia rebound), ultrasonic hardness test (UCI), Shore hardness (SHORE).

https://www.yukerivet.com/news/pull-rivets-include-aluminum-iron-and-stainless-steel-what-are-semi-stainless-steel-blind-rivets/