Toro Z MASTER 2000 Series - Page 18

Standard T orque for Dry , Zinc Plated, and Steel Fasteners (Inch Series)
Thread Size Grade 1,
5, & 8
Fasteners
with Thin
Height Nuts
SAE Grade 1 Bolts, Screws,
Studes & Sems with
Regular Height Nuts (SAE
Grade 2 or Better Nut)
SAE Grade 5 Bolts, Screws,
Studs & Sems with Regular
Height Nuts (SAE Grade
5 or Better Nut)
SAE Grade 8 Bolts, Screws,
Studs & Sems with Regular
Height Nuts (SAE Grade
8 or Better Nut)
in-lb in-lb N • cm in-lb N • cm in-lb N • cm
#6-32 UNC
15 ± 2 169 ± 23 23 ± 3 260 ± 34
#6-40 UNF
10 ± 2 13 ± 2 147 ± 23
17 ± 2 192 ± 23 25 ± 3 282 ± 34
#8-32 UNC
29 ± 3 328 ± 34 41 ± 5 463 ± 56
#8-36 UNF
13 ± 2 25 ± 5 282 ± 30
31 ± 4 350 ± 45 43 ± 5 486 ± 56
#10-24 UNC
42 ± 5 475 ± 56 60 ± 6 678 ± 68
#10-32 UNF
18 ± 2 30 ± 5 339 ± 56
48 ± 5 542 ± 56 68 ± 7 768 ± 79
1/4-20 UNC
48 ± 7 53 ± 7 599 ± 79 100 ± 10 1 130 ± 1 13 140 ± 15 1582 ± 169
1/4-28 UNF
53 ± 7 65 ± 10 734 ± 1 13 1 15 ± 12 1299 ± 136 160 ± 17 1808 ± 192
5/16-18 UNC
1 15 ± 15 105 ± 15 1 186 ± 169 200 ± 25 2260 ± 282 300 ± 30 3390 ± 339
5/16-24 UNF
138 ± 17 128 ± 17 1446 ± 192 225 ± 25 2542 ± 282 325 ± 33 3672 ± 373
ft-lb ft-lb
N • m
ft-lb
N • m
ft-lb
N • m
3/8-16 UNC
16 ± 2 16 ± 2 22 ± 3 30 ± 3 41 ± 4 43 ± 5 58 ± 7
3/8-24 UNF
17 ± 2 18 ± 2 24 ± 3 35 ± 4 47 ± 5 50 ± 6 68 ± 8
7/16-14 UNC
27 ± 3 27 ± 3 37 ± 4 50 ± 5 68 ± 7 70 ± 7 95 ± 9
7/16-20 UNF
29 ± 3 29 ± 3 39 ± 4 55 ± 6 75 ± 8 77 ± 8 104 ± 1 1
1/2-13 UNC
30 ± 3 48 ± 7 65 ± 9 75 ± 8 102 ± 1 1 105 ± 1 1 142 ± 15
1/2-20 UNF
32 ± 4 53 ± 7 72 ± 9 85 ± 9 1 15 ± 12 120 ± 12 163 ± 16
5/8-1 1 UNC
65 ± 10 88 ± 12 1 19 ± 16 150 ± 15 203 ± 20 210 ± 21 285 ± 28
5/8-18 UNF
75 ± 10 95 ± 15 129 ± 20 170 ± 18 230 ± 24 240 ± 24 325 ± 33
3/4-10 UNC
93 ± 12 140 ± 20 190 ± 27 265 ± 27 359 ± 37 375 ± 38 508 ± 52
3/4-16 UNF
1 15 ± 15 165 ± 25 224 ± 34 300 ± 30 407 ± 41 420 ± 43 569 ± 58
7/8-9 UNC
140 ± 20 225 ± 25 305 ± 34 430 ± 45 583 ± 61 600 ± 60 813 ± 81
7/8-14 UNF
155 ± 25 260 ± 30 353 ± 41 475 ± 48 644 ± 65 667 ± 66 904 ± 89
Note: Reduce torque values listed in the table above by 25% for lubricated fasteners. Lubricated
fasteners are dened as threads coated with a lubricant such as oil, graphite, or thread sealant such
as Loctite.
T orque values may have to be reduced when installing fasteners into threaded aluminum or brass. The
specic 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 specied in SAE J429. The tolerance is approximately ± 10% of the nominal torque value.
Thin nuts include jam nuts.
Specications and Maintenance: T orque Specications Page 2–6 2000 Series Z MASTER®Service Manual
3460-328 Rev A