Case 2050M Operator's Manual page 160

Inch non-flanged hardware
Nominal size SAE grade 5 bolt and nut
Unplated or
silver plated
8 N·m
1/4
(71 lb in)
17 N·m
5/16
(150 lb in)
30 N·m
3/8
(22 lb ft)
48 N·m
7/16
(36 lb ft)
74 N·m
1/2
(54 lb ft)
107 N·m
9/16
(79 lb ft)
147 N·m
5/8
(108 lb ft)
261 N·m
3/4
(193 lb ft)
420 N·m
7/8
(310 lb ft)
630 N·m
1
(465 lb ft)
Identification
Inch bolts and free-spinning nuts
1 Grade 2 - No Marks
2 Grade 5 - Three Marks
3 Grade 8 - Five Marks
7 - MAINTENANCE
SAE grade 8 bolt and nut
Plated Unplated or
W/ZnCr gold
Plated silver
11 N·m 12 N·m
(97 lb in) (106 lb in)
23 N·m 24 N·m
(204 lb in) (212 lb in)
40 N·m 43 N·m
(30 lb ft) (31 lb ft)
65 N·m 68 N·m
(48 lb ft) (50 lb ft)
98 N·m 104 N·m
(73 lb ft) (77 lb ft)
142 N·m 150 N·m
(105 lb ft) (111 lb ft)
196 N·m 208 N·m
(145 lb ft) (153 lb ft)
348 N·m 369 N·m
(257 lb ft) (272 lb ft)
561 N·m 594 N·m
(413 lb ft) (438 lb ft)
841 N·m 890 N·m
(620 lb ft) (656 lb ft)
20083682
Grade marking examples
SAE Grade Identification
7-4
Locknut GrB W/
Plated
W/ZnCr gold
16 N·m
(142 lb in)
32 N·m
(283 lb in)
57 N·m
(42 lb ft)
91 N·m
(67 lb ft)
139 N·m
(103 lb ft)
201 N·m
(148 lb ft)
277 N·m
(204 lb ft)
491 N·m
(362 lb ft)
791 N·m
(584 lb ft)
1187 N·m
(875 lb ft)
3
4 Grade 2 Nut - No Marks
5
Grade 5 Nut - Marks 120 ° Apart
6 Grade 8 Nut - Marks 60 ° Apart
Locknut GrC W/
Gr5 bolt Gr8 bolt
8.5 N·m 12.2 N·m
(75 lb in) (109 lb in)
17.5 N·m 25 N·m
(155 lb in) (220 lb in)
31 N·m 44 N·m
(23 lb ft) (33 lb ft)
50 N·m 71 N·m
(37 lb ft) (53 lb ft)
76 N·m 108 N·m
(56 lb ft) (80 lb ft)
111 N·m 156 N·m
(82 lb ft) (115 lb ft)
153 N·m 215 N·m
(113 lb ft) (159 lb ft)
271 N·m 383 N·m
(200 lb ft) (282 lb ft)
437 N·m 617 N·m
(323 lb ft) (455 lb ft)
654 N·m 924 N·m
(483 lb ft) (681 lb ft)