Snorkel T125J, Repair Parts Manual, Page: 377 / 415

Capscrew torque chart
T
B125
9
GRADE
BOLT
SAE GRADE
1 OR 2
SAE GRADE
5
SAE GRADE
6
SAE GRADE
8
MARKING
MIN. TENSILE
STRENGTH
64,000 P.S.I. 105,000 P.S.I. 133,000 P.S.I. 150,000 P.S.I.
MATERIAL
DEFINITION
LOW
CARBON
STEEL
MEDIUM
CARBON
STEEL
TEMPERED
MEDIUM
CARBON
STEEL
Q & T
MED. CARBON
ALLOY
STEEL
Q & T
INDETERMINATE
QUALITY
MINIMUM
COMMERCIAL
QUALITY
MEDIUM
COMMERCIAL
QUALITY
BOLT SIZE
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
5
9
15
24
37
53
74
120
190
282
7
14
25
40
60
88
120
200
302
466
10
19
34
55
85
120
167
280
440
660
10.5
22
37
60
92
132
180
296
473
714
RECOMMENDED TORQUE VALUES (FT - LBS)
The following rules apply to the chart
1. Consult manufacturers' specific recommendations when available.
2. The chart may be used with both course and fine thread fasteners lightly lubricated.
3. Increase torque by 20% when multiple tapered tooth (shake proof) lock washers are used.
4. The torque values are given in foot-pounds.
5. Inch pound equivalent may be obtained by multiplying by 12.