Standard Torque For Dry, Zinc Plated, And Steel Fasteners (Inch Series) - Toro Greensmaster eFlex 1021 Service Manual

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch
Series)
Thread Size Grade 1, 5
and 8 with
Thin Height
Nuts
in-lb
# 6 - 32 UNC
10 ± 2
# 6 - 40 UNF
# 8 - 32 UNC
13 ± 2
# 8 - 36 UNF
# 10 - 24
UNC
18 ± 2
# 10 - 32
UNF
1/4 - 20 UNC 48 ± 7
1/4 - 28 UNF 53 ± 7
5/16 - 18
115 ± 15
UNC
5/16 - 24
138 ± 17
UNF
ft-lb
16 ± 2
3/8 - 16 UNC
3/8 - 24 UNF 17 ± 2
7/16 - 14
27 ± 3
UNC
7/16 - 20
29 ± 3
UNF
1/2 - 13 UNC 30 ± 3
1/2 - 20 UNF 32 ± 4
5/8 - 11 UNC 65 ± 10
5/8 - 18 UNF 75 ± 10
3/4 - 10 UNC 93 ± 12
3/4 - 16 UNF 115 ± 15
7/8 - 9 UNC 140 ± 20
7/8 - 14 UNF 155 ± 25
Note: Reduce the torque values listed in the table above by 25% for lubricated fasteners. Lubricated
fasteners are defined as threads coated with a lubricant, such as engine oil, or a thread sealant, such
as Loctite.
Specifications and Maintenance: Torque Specifications
SAE Grade 1 Bolts, Screws,
Studs, and Sems with
Regular Height Nuts
(SAE J995 Grade 2 or
Stronger Nuts)
in-lb N∙cm
13 ± 2 147 ± 23
25 ± 5 282 ± 56
30 ± 5 339 ± 56
53 ± 7 599 ± 79
65 ± 10 734 ± 113
105 ± 15 1186 ± 169
128 ± 17 1146 ± 192
ft-lb N∙m
16 ± 2 22 ± 3
18 ± 2 24 ± 3
27 ± 3 37 ± 4
29 ± 3 39 ± 4
48 ± 7 65 ± 9
53 ± 7 72 ± 9
88 ± 12 119 ± 16
95 ± 15 129 ± 20
140 ± 20 190 ± 27
165 ± 25 224 ± 34
225 ± 25 305 ± 34
260 ± 30 353 ± 41
Note: The torque values must be reduced when installing the fasteners into
threaded aluminum or brass. The specified torque value should be determined
based on the aluminum or base material strength, fastener size, length of thread
engagement, etc.
Note: The nominal torque values listed above for Grade 5 and 8 fasteners are
based on 75% of the minimum proof load specified in SAE J429. The tolerance
is approximately ± 10% of the nominal torque value. The thin height nuts include
jam nuts.
SAE Grade 5 Bolts, Screws,
Studs, and Sems with
Regular Height Nuts
(SAE J995 Grade 2 or
Stronger Nuts)
in-lb N∙cm
15 ± 2 169 ± 23
17 ± 2 192 ± 23
29 ± 3 328 ± 34
31 ± 4 350 ± 45
42 ± 5 475 ± 56
48 ± 5 542 ± 56
100 ± 10 1130 ± 113
115 ± 12 1299 ± 136
200 ± 25 2260 ± 282
225 ± 25 2542 ± 282
ft-lb N∙m
30 ± 3 41 ± 4
35 ± 4 47 ± 5
50 ± 5 68 ± 7
55 ± 6 75 ± 8
75 ± 8 102 ± 11
85 ± 9 115 ± 12
150 ± 15 203 ± 20
170 ± 18 230 ± 24
265 ± 27 359 ± 37
300 ± 30 407 ± 41
430 ± 45 583 ± 61
475 ± 48 644 ± 65
Page 2–8
SAE Grade 8 Bolts, Screws,
Studs, and Sems with
Regular Height Nuts
(SAE J995 Grade 2 or
Stronger Nuts)
in-lb N∙cm
23 ± 3 262 ± 34
25 ± 3 282 ± 34
41± 5 463 ± 56
43 ± 5 486 ± 56
60 ± 6 678 ± 68
68 ± 7 768 ± 79
140 ± 15 1582 ± 169
160 ± 17 1808 ± 192
300 ± 30 3390 ± 339
325 ± 33 3672 ± 373
ft-lb N∙m
43 ± 5 58 ± 7
50 ± 6 68 ± 8
70 ± 7 95 ± 9
77 ± 8 104 ± 11
105 ± 11 142 ± 15
120 ± 12 163 ± 16
210 ± 21 285 ± 28
240 ± 24 325 ± 33
375 ± 38 508 ± 52
420 ± 43 569 ± 58
600 ± 60 813 ± 81
667 ± 66 904 ± 89
Greensmaster ® eFlex 1021
20248SL Rev C