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Tightening of Non
-
Structural Bolts
For light or medium duty fastening, Curtis recommends using a general industry standard of tightening until snug and then
giving an additional one quarter turn of the tool as deemed reasonable for the application (i.e.: at the installer
’
s discretion).
If torque values are required, the examples listed below are intended as a reasonable reference for use in the majority of
non
-
structural fastener applications such as: small diameter fasteners; bolts passing thru tubing, glass, plastic, nylon or
rubber washers, threaded inserts, etc.
If more than one application below applies, use the lower torque value.
FASTENER
SIZE:
FASTENER
TYPE:
WASHER
MATERIAL:
APPLICATION:
TORQUE
(INCH
-
POUNDS)
(±5)
#10
Machine Screws
-
in Nylon P
-
Clamps
20
#10
Machine Screws
-
Strobe Light
(plastic base)
35
M5
Set Screws
-
Wiper Arm
20
1/4”
Cap Nut
-
Windshield Wiper
20
1/4”
Bolts
-
Tubing
(5/8”
to
3/4”
wide)
132
1/4”
Bolts
Rubber
-
60
1/4”
Bolts
Nylon / Plastic
-
72
1/4”
Bolts
-
Factory Installed
Threaded Inserts
132
5/16”
Bolts
-
Tubing
(1”
or wider)
60
5/16”
Flat Head Bolts
-
Plastic Windshield
Hinge
79
5/16”
Bolts
Rubber
-
120
5/16”
Bolts
Nylon / Plastic
-
150
5/16”
Ball Studs
-
-
150
5/16”
Bolts
-
Factory Installed
Threaded Inserts
240
3/8”
Bolts
-
Tubing
120
M12
Door Striker Pins
-
-
120