PRECOAT BOLTS
(Bolts with seal lock agent coating on threads)
1. Do not use the precoat bolt as it is in either of the following
cases:
(1) After it is removed.
(2) When the precoat bolt is moved (loosened or tightened)
by tightness check, etc.
Note:
For torque check, use the lower limit of the allowable
tightening torque range. If the bolt moves, retighten it
according to the steps below.
2. Method for reuse of precoat bolts
(1) Wash the bolt and threaded hole. (The threaded hole
must be washed even for replacement of the bolt.)
(2) Perfectly dry the washed parts by air blowing.
(3) Coat the specified seal lock agent to the threaded portion
of the bolt.
HIGH PRESSURE HOSE FITTING TIGHTENING TORQUE
1. When connecting a high pressure hose, wipe the hose fitting and mating nipple contact surfaces with clean cloth
to remove foreign matters and dirt. Also check no dent or other damage on the contact surfaces before
installation.
2. When connecting a high pressure hose, hold the hose to align the fitting with the nipple and tighten the fitting.
3. The maximum tightening torque must not exceed twice the standard tightening torque.
Seal lock agent
Nominal diameter
of screw
Standard tightening torque N·m (kgf·cm) [ft·lbf]
Hose inside
diameter mm (in)
Standard Tightening range
7/16 — 20UNF 25 (250) [18.1] 24 ~ 26 (240 ~ 270) [17.4 ~ 19.5] 6 (0.24)
9/16 — 18UNF 34 (350) [25.3] 32 ~ 36 (330 ~ 370) [29.3 ~ 26.8] 9 (0.35)
3/4 — 16UNF 59 (600) [43.4] 56 ~ 62 (570 ~ 630) [41.2 ~ 45.6] 12 (0.47)
7/8 — 14UNF 59 (600) [43.4] 56 ~ 62 (570 ~ 630) [41.2 ~ 45.6] 12 (0.47)
7/8 — 14UNF 78 (800) [57.9] 74 ~ 82 (740 ~ 840) [53.5 ~ 60.8] 15 (0.59)
1·1/16 — 12UNF 118 (1200) [86.8] 112 ~ 123 (1140 ~ 1250) [82.5 ~ 90.4] 19 (0.75)
1·5/16 — 12UNF 137 (1400) [101.3] 130 ~ 144 (1330 ~ 1470) [96.2 ~ 106.4] 25 (0.98)
PF1/4 25 (250) [18.1] 24 ~ 26 (240 ~ 270) [17.4 ~ 19.5] 6 (0.24)
PF3/8 34 (350) [25.3] 32 ~ 36 (330 ~ 370) [23.9 ~ 26.8] 9 (0.35)
PF1/2 59 (600) [43.4] 56 ~ 62 (570 ~ 630) [41.2 ~ 45.6] 12 (0.47)
PF3/4 118 (1200) [86.8] 112 ~ 123 (1140 ~ 1250) [82.5 ~ 90.4] 19 (0.75)
PF1 137 (1400) [101.3] 130 ~ 144 (1330 ~ 1470) [96.2 ~ 106.4] 25 (0.98)
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