Mechanical properties of ASTM A194 Hex Nuts
These nuts are usually thicker and heavier than usual hex nuts DIN 934 and have higher strength and tensile. Different grades of this standard are produced following tempering and quenching procedure and therefore, Hex nuts A194 can withstand higher pressure and temperature. Since A194 nuts are often used with stud bolts, you can amass further information regarding these nuts in our stud bolt category. Mechanical properties of these nuts are available in the table below.
Hardness- Rockwell |
Proof load ksi |
Heating temperature |
Nominal Dia in |
ASTM A194 Nut Grade |
159-352 |
150 |
0 °F |
1/4 - 4 |
ASTM A194 Grade 2 |
C24-C38 |
175 |
850 °F - 450 °C |
1/4 - 4 |
ASTM A194 Grade 2H |
159-237 |
150 |
1150 °F - 620 °C |
1/4 - 4 |
ASTM A194 Grade 2HM |
C24-C38 |
175 |
1100 °F - 600 °C |
1/4 - 4 |
ASTM A194 Grade 4 |
C24-C38 |
175 |
1100 °F - 600 °C |
1/4 - 4 |
7 |
159-237 |
150 |
1150 °F - 620 °C |
1/4 - 4 |
ASTM A194 Grade 7M |
126-300 |
80 |
- |
1/4 - 4 |
ASTM A194 Grade 8 |
126-300 |
80 |
- |
1/4 - 4 |
ASTM A194 Grade 8M |
Hex Nuts and Heavy Hex Nuts