9
B1001
M8 x 20
The following symbols are used as supplements
to the symbols above to describe the design or
function of the fasteners.
Definition of fasteners on following pages.
The size of a fastener is written as a diameter
measurement
(M)
ISO 68-1. For bolts, this is followed
by a length measurement. The length of the bolt is
measured from below the head to the tip of the bolt.
Low
Tensilock
Lock
Countersunk
Dome
ADDITIONAL SYMBOLS
Allen bolt
Partial thread Allen bolt
Partial thread hex bolt
Hex bolt
Partial thread flange bolt
Flange bolt
Carriage bolt
Shoulder bolt
Phillips bolt
Slotted bolt
Set screw
Hex nut
Flat washer
Flange nut
BOLTS & NUTS
(Diameter)
DIAMETER & LENGTH
(Length)
This symbol describes the
sawing direction and reappears
during assembly.
This symbol describes the
recommended lifting point for
heavy lifts.
Screw the joint finger-tight.
When this symbol appears
during assembly, parts must
be lubricated before installa-
tion. Lubricate affected parts
with universal grease.