Maintenance Standard 1
5
Flange Nut
Unit : (N•m {kgf•cm, lbf•ft})
Bite Type Pipe Joint
Unit : (N•m {kgf•cm, lbf•ft})
Strength Classification for Bolt
Designation/Type
4T 7T
M4 Without slotted 1.5 to 2.0 {15 to 20, 1.08 to 1.45} -
M5
Without slotted 3.9 to 4.4 {40 to 45, 2.89 to 3.25} 6.9 to 7.9 {70 to 80, 5.06 to 5.79}
With slotted 2.9 to 3.4 {30 to 35, 2.17 to 2.53} 5.4 to 6.4 {55 to 65, 3.98 to 4.7}
M6
Without slotted 6.4 to 8.4 {65 to 85, 4.7 to 6.15}
13.7 to 15.7
{140 to 160, 10.12 to 11.6}
With slotted 4.9 to 6.9 {50 to 70, 3.62 to 5.06} 10.8 to 12.7 {110 to 130, 7.96 to 9.4}
M8
Without slotted
16.7 to 21.6
{170 to 220, 12.29 to 15.9 }
26.5 to 31.4 {270 to 320, 19.5 to 23.1}
With slotted 12.3 to 17.2 {125 to 175, 9.04 to 12.7}
20.6 to 25.5
{210 to 260, 15.19 to 18.8 }
M10
Without slotted 34.3 to 39.2 {350 to 400, 25.3 to 28.9} 50 to 54.9 {510 to 560, 36.9 to 40.5}
With slotted 33.3 to 38.2 {340 to 390, 24.6 to 28.2} 48.1 to 53 {490 to 540, 35.4 to 39.1}
Pipe Size (in {mm})
Temp. Tightening (1
st
) Tightening (2
nd
) Schematic Drawing
External
Diameter
Thickness
8 {0.315}
1 to 1.5 {0.039
to 0.059}
29 to 34
{3 to 3.5, 21.7 to 25.3}
29 to 34
{3 to 3.5, 21.7 to 25.3}
10
{0.394}
1 to 1.5{0.039
to 0.059}
29 to 39
{3 to 4, 21.7 to 28.9}
34 to 49
{3.5 to 5, 25.3 to 36.2}
12
{0.472}
1 to 2.5{0.039
to 0.098}
44 to 59
{4.5 to 6, 32.5 to 43.4}
49 to 69
{5 to 7, 36.2 to 50.6}
15
{0.591}
1 to 2.5 {0.039
to 0.098}
69 to 98
{7 to 10, 50.6 to 72.3}
88 to 118
{9 to 12, 65.1 to 86.8}
18
{0.709}
1.5 to 2 {0.059
to 0.079}
118 to 147
{12 to 15, 86.8 to 108.5}
147 to 167
{15 to 17, 108.5 to 122.9}
20
{0.787}
2 to 3 {0.079 to
0.118}
147 to 177
{15 to 18, 108.5 to 130.2}
167 to 206
{17 to 21, 122.9 to 151.9}
22
{0.866}
2 {0.079}
177 to 206
{18 to 21, 130.2 to 151.9}
196 to 235
{20 to 24, 144.6 to 173.6}
27.2
{1.071}
2.8 {0.11}
323 to 343
{33 to 35, 238.7 to 253.1}
343 to 373
{35 to 38, 253.1 to 274.8}
GZ3W20-001
www.mymowerparts.com
K&T Saw Shop 606-678-9623 or 606-561-4983
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