Table of Contents
Advertisement
Unified Inch Bolt and Screw Torque Values
SAE Grade 1
Screw
Size
Lubricated
Dry
6
N-m lb.-in. N-m
1/4
3.7
33
4.7
5/16
7.7
68
9.8
3/8
13.5 120
17.5 155 22
N-m
7/16
22
194
28
N-m lb.-ft.
1/2
34
25
42
9/16
48
35.5
60
5/8
67
49
85
3/4
120
88
150
7/8
190
140
240
1
285
210
360
1-1/8
400
300
510
1-1/4
570
420
725
1-3/8
750
550
950
1-1/2
990
730
1250 930 990
Torque values listed are for general use only, based on the
strength of the bolt or screw. DO NOT use these values if a
different torque value or tightening procedure is given for a specific
application. For plastic insert or crimped steel type lock nuts, for
stainless steel fasteners, or for nuts on U-bolts, see the tightening
instructions for the specific application.
Shear bolts are designed to fail under predetermined loads.
Always replace shear bolts with identical grade.
Grade 2 applies for hex cap screws (not hex bolts) up to 6 in. (152 mm) long. Grade 1 applies for hex cap
5
screws over 6 in. (152 mm) long, and for all other types of bolts and screws of any length.
"Lubricated" means coated with a lubricant such as engine oil, fasteners with phosphate and oil coatings,
6
or 7/8 in. and larger fasteners with JDM F13C, F13F or F13J zinc flake coating.
"Dry" means plain or zinc plated without any lubrication, or 1/4 to 3/4 in. fasteners with JDM F13B, F13E
7
or F13H zinc flake coating.
TIGHTENING HARDWARE
Figure 21: Common imperial bolt grade markings
SAE Grade 2
5
Lubricated
Dry
6
7
lb.-
N-m
lb.-in. N-m
in.
42
6
53
7.5
86
12
106
15.5 137 19.5
194
27
lb.-
N-m
lb.-ft. N-m
ft.
20.5 35
26
44
31
53
39
67
45
76
56
95
63
105
77
135
110 190
140
240
175 190
140
240
265 285
210
360
375 400
300
510
535 570
420
725
700 750
550
950
730
1250 930 2250 1650
Utility Sprayer 25' / 30' / 40' / 45'
TIGHTENING HARDWARE
SAE Grade 5, 5.1 or 5.2
Lubricated
Dry
7
6
lb.-
N-m
lb.-in. N-m
in.
66
9.5
84
12
172
25
N-m
lb.-ft. N-m lb.-ft.
240 35
26
44
lb.-
ft.
32.5 56
41
70
49
85
63
110
70
125
92
155
100 170
125
215
175 300
220
380
175 490
360
615
265 730
540
920
375 910
670
1150 850
535 1280 945
1630 1200 2050 1500
700 1700 1250
2140 1580 2700 2000
2850 2100 3600 2650
Replace fasteners with the same or higher grade. If higher
grade fasteners are used, tighten these to the strength of the
original. Make sure fastener threads are clean and that you
properly start thread engagement. When possible, lubricate
plain or zinc plated fasteners other than lock nuts, wheel bolts,
or wheel nuts, unless different instructions are given for the
specific application.
SAE Grade 8 or 8.2
Lubricated
Dry
7
6
lb.-
N-m
lb.-in. N-m lb.-in.
in.
106
13.5
120
17
N-m
lb.-ft. N-m lb.-ft.
221
28
20.5
35
32.5 49
36
63
52
80
59
100
80
120
88
155
115
175
130
220
160
240
175
305
280
425
315
540
455
690
510
870
680
1030 760
1300 960
1450 1075
1850 1350
2600 1920
3400 2500
4550 3350
Page 101
7
150
26
46
74
115
165
225
400
640
Advertisement
Table of Contents
