Hardness Requirements
|
|||
Grade Type | Complete Nuts | Sample Nut After | |
Brinell Hardness | Rockwell Hardness | ||
C Scale
|
B Scale
|
Brinell Hardness, min
|
Rockwell Hardness B Scale, min |
2H 1.1/2" & Under Over 1. 1/2" |
ASTM A194 GR.2H ASTM A194 GR.2HM ASTM A194 GR.4L ASTM A194 GR.7L ASTM A194 GR.7M ASTM A563 GR.C F10T |