Toro Z Master 7500-D Series Service Manual page 14

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series)
Thread Size Grade 1, 5, &
8 Fasteners
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 UNC
115 ± 15
5/16-24 UNF
138 ± 17
ft-lb.
3/8-16 UNC 16 ± 2
3/8-24 UNF
17 ± 2
7/16-14 UNC 27 ± 3
7/16-20 UNF
29 ± 3
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 torque values listed in the table above by 25% for lubricated fasteners. Lubricated
fasteners are defined as threads coated with a lubricant such as oil, graphite, or thread sealant
such as Loctite.
Torque values my have to be reduced when installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based on the fastener size, the aluminum or base
material strength, length of thread engagement, etc.
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. Thin nuts include jam nuts.
Z Master 7500-D Series Service Manual
March 2018 - Digital Edition
SPECIFICATIONS
SAE Grade 1 Bolts,
Screws, Studs & Sems
with Regular Height
Nuts (SAE Grade 2 or
Better Nut)
In-lb. N-cm
13 ± 2 147 ± 23
25 ± 5 282 ± 30
30 ± 5 339 ± 56
53 ± 7 599 ± 79
65 ± 10 734 ± 113
105 ± 15 1186 ± 169
128 ± 17 1446 ± 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
SAE Grade 5 Bolts,
Screws, Studs & Sems
with Regular Height
Nuts (SAE Grade 5 or
Better Nut)
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
SAE Grade 8 Bolts,
Screws, Studs & Sems
with Regular Height
Nuts (SAE Grade 8 or
Better Nut)
In-lb. N-cm
23 ± 3 260 ± 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
2-5
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