|
Standard for Nut |
Grade |
Hardness |
Dimensional style of nut |
Nominal nut size |
Proof Load Stress ksi |
Head Marking |
|
|
in. |
Non-Zinc coated Nuts |
Zinc coated Nuts |
|||||
|
A194 |
2 |
HRB159-352 |
hex |
1/4 to 1-1/2 |
135 |
135 |
|
|
heavy hex |
1/4 to 4 |
150 |
150 |
||||
|
2H |
≦1-1/2: 248-352， ﹥1-1/2 : 212-352 |
hex |
1/4 to 1-1/2 |
150 |
150 |
|
|
|
heavy hex |
1/4 to 4 |
175 |
175 |
||||
|
2HM |
HRB159-235 |
hex |
1/4 to 1-1/2 |
135 |
135 |
|
|
|
heavy hex |
1/4 to 4 |
150 |
150 |
||||
|
4 |
248-327 |
hex |
1/4 to 1-1/2 |
150 |
150 |
|
|
|
heavy hex |
1/4 to 4 |
175 |
175 |
||||
|
7 |
248-327 |
hex |
1/4 to 1-1/2 |
150 |
150 |
|
|
|
heavy hex |
1/4 to 4 |
175 |
175 |
||||
|
7M |
HRB159-235 |
hex |
1/4 to 1-1/2 |
135 |
135 |
|
|
|
heavy hex |
1/4 to 4 |
150 |
150 |
||||
|
8 |
126-300 |
hex |
1/4 to 1-1/2 |
75 |
75 |
|
|
|
heavy hex |
1/4 to 4 |
80 |
80 |
||||
|
8M |
126-300 |
hex |
1/4 to 1-1/2 |
75 |
75 |
|
|
|
heavy hex |
1/4 to 4 |
80 |
80 |
||||
