256
[Table 2]
Nominal
size
a
(mm)
Width
across
flat
b
(mm)
[3] Bolt marked with “12.9”
(strength classification)
on its head
[4] Any other bolts
Tightening torque {N•m (kgf•m)} Tightening torque {N•m (kgf•m)}
Target value Tolerance
Target
value
Tolerance
6 10 13.0 (1.30) 11.1–15.0 (1.11–1.50) 3.0 (0.30) 2.6–3.5 (0.26–0.35)
8 13 31.5 (3.20) 26.8–36.2 (2.72–3.70) 7.5 (0.75) 6.5–8.6 (0.65–0.85)
10 17 62.5 (6.40) 53.1–71.9 (5.44–7.35) 14.5 (1.45) 12.6–16.7 (1.25–1.65)
12 19 109 (11.1) 92.7–125 (9.44–12.8) 25.0 (2.55) 21.7–28.8 (2.20–2.95)
14 22 174 (17.7) 148–200 (15.0–20.4) 40.0 (4.10) 34.8–46.0 (3.55–4.70)
16 24 271 (27.7) 230–312 (23.5–31.9) 62.5 (6.40) 54.3–71.9 (5.55–7.35)
18 27 373 (38.1) 317–429 (32.4–43.8) 86.0 (8.75) 74.8–98.9 (7.60–10.0)
20 30 529 (54.0) 450–608 (45.9–62.1) 122 (12.4) 106–140 (10.8–14.3)
22 32 720 (73.4) 612–828 (62.4–84.4) 166 (16.9) 144–191 (14.7–19.4)
24 36 915 (93.3) 778–1050 (79.3–107) 211 (21.5) 183–243 (18.7–24.7)
27 41 1340 (136) 1140–1540 (116–156) 309 (31.4) 269–355 (27.3–36.1)
30 46 1820 (185) 1550–2090 (157–213) 419 (42.6) 364–482 (37.0–49.0)
33 50 2470 (252) 2100–2840 (214–290) 570 (58.0) 495–656 (50.4–66.7)
36 55 3180 (324) 2700–3660 (275–373) 732 (74.5) 636–842 (64.8–85.7)
7.2 LIST OF HOSE TIGHTENING TORQUE
Nominal
number
Width
across
flats
a (mm)
Tightening torque {N•m (kgf•m)}
Target value Tolerance
02 19 44 (4.5) 35–54 (3.5–5.5)
03
22 74 (7.5) 54–93 (5.5–9.5)
24 78 (8.0) 59–98 (6.0–10.0)
04 27 103 (10.5) 84–132 (8.5–13.5)
05 32 157 (16.0) 128–186 (13.0–19.0)
06 36 216 (22.0) 177–245 (18.0–25.0)