Singer 321 KNITTER - Page 22

18
V
-c
Kinds
of
a
screw
The
screws
used
for
this
model
are
all
ISO.
43)
Binding
Head
Screw
•
Flat
Head
Screw
ER
Oval
Counter
-sunk
Screw
ED
Truss
Head
Screw
•
Pan
Head
Screw
Fig.
20
41)
Round
Head
Tapping
Screw
•
SW
Binding
Head
Screw
SPW
Binding
Head
Screw
(with
Spring
Washer)