|
| |
|
|
SAE
Grade
|
Markings
|
Tensile
PSI
|
Material
|
5/16 |
3/8 |
7/16 |
1/2 |
9/16 |
5/8 |
3/4 |
7/8 |
|
Brass
|
 |
60,000
|
Copper 63%
Zinc 37%
|
9
|
17
|
27
|
37
|
49
|
78
|
104
|
160
|
|
Stainless
|
 |
72,000
|
AISI 303
|
10
|
18
|
28
|
40
|
54
|
80
|
117
|
180
|
|
2
|
 |
74,000
|
Low
Carbon
|
12
|
20
|
32
|
47
|
69
|
96
|
155
|
206
|
|
3
|
 |
100,000 |
Medium
Carbon
|
17
|
30
|
47
|
69
|
103
|
145
|
234
|
372
|
|
5
|
 |
120,000 |
Medium
Carbon Heat
Treated
|
19
|
33
|
54
|
78
|
114
|
154
|
257
|
382
|
|
6
|
 |
133,000 |
Medium
Carbon
Tempered
|
24
|
43
|
69
|
106
|
150
|
209
|
350
|
550
|
|
7
|
 |
133,000 |
Medium
Carbon
Alloy
|
25
|
44
|
71
|
110
|
154
|
215
|
360
|
570
|
|
8
|
 |
150,000 |
Medium
Carbon
Alloy
|
29
|
47
|
78
|
119
|
169
|
230
|
380
|
600
|
|
10
|
 |
160,000 |
High
Carbon
Case Hardened
|
33
|
54
|
84
|
125
|
180
|
250
|
400
|
640
|
Safety Notes
|
These values are given in lb-ft and apply to clean
smooth lubricated threads on NEW fasteners.
The nut and washer must have equal or greater rating
then the bolt.
Consult your manual for material type
The values are for the fastener not the assembly.
Some assembles can not with stand the maximum clamping force.
The values for fine treads are slightly higher.
Compiled By Chris Klossner
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The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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