Hakko Electronics 470B User manual

CAUTION : Remove the pump securing screws (M4x25 marked red)
from the bottom of the station.
Failure to do so may result in serious problems.
Desoldering Tool
Instruction Manual
Thank you for purchasing the Hakko 470B Desoldering
Tool.
Please read the manual before using the Hakko 470B.
Store the manual in a safe, easily accessible place for
future reference.
Packing List··················································
Precautions··················································
Part Names
Operation
Maintenance
Replacement Parts
Parts List
Specifications, Wiring·······························
(Desoldering Gun)··················
(Station)··································
(Preparation-
Assembly and Connection) ······
(Desoldering)························
(Cleaning during Operation) ········
(Problems during Desoldering )
( Post-operation Maintenance )···
(Troubleshooting Guide)········
(Desoldering Gun)···········
(Station)···························
(Replacing Heating Element) ·····
(Station)····························
(Desoldering Gun)················
10
11
21
22
Table of Contents
1
2
3
4
9
5·6
7·8
12~14
15·16
17·18
19·20
¨

SpannerStation
Iron Holder Base Spring Iron Holder Cleaning Sponge
Filter Pipe
Ceramic Paper Filter (S)
Ceramic Paper Filter (L) Spring Filter
Cleaning Pin for Ø1.0 mm (0.04 in.) Nozzle
Cleaning Drill for Ø1.0 mm (0.04 in.) Nozzle
Cleaning Pin for Heating Element Cleaning Pin Holder
Silicone Grease Desoldering Gun
1
Packing List Please check to make sure that all the items listed below
are included in the Hakko 470B package.
Station····················································
Desoldering Gun····································
Iron Holder Base····································
Spring Iron Holder··································
Cleaning Sponge····································
Filter Pipe···············································
1
1
1
1
1
1
Ceramic Paper Filter (S)····································
Ceramic Paper Filter (L)····································
Spring Filter·······················································
Cleaning Pin (for Ø1.0mm [0.04 in.] nozzle)······
Cleaning Pin (for Heating Element)···················
Cleaning Pin Holder···········································
Cleaning Drill (for Ø1.0mm [0.04 in.] nozzle)······
SIlicone Grease··················································
Spanner······························································
Instruction Manual··············································
2
4
3
1
1
1
1
1
1
1

2
When the power is ON, the nozzle temperature is between
380˚C and 480˚C (716˚F and 896˚F).
Since mishandling may lead to burns or fire, be sure to comply with
the following precautions.
Safety Instructions
Warnings, cautions are placed at critical points in this manual to direct the operator’s
attention to significant items. They are defined as follows:
WARNING
WARNING: Failure to comply with a WARNING may result in serious injury or death.
CAUTION : Failure to comply with a CAUTION may result in injury to the operator, or
damage to the items involved.
For your own safety, be sure to comply with these precautions.
CAUTION
Remove the pump securing screws (M4x25 marked red)
from the bottom of the station.
Failure to do so may result in serious problems.
To prevent accidents and failures, be sure to take the following precautions:
·Do not use the unit for applications other than desoldering.
·Do not rap the desoldering gun against the work bench to shake off
residual solder, or otherwise subject the iron to severe shocks.
·Do not modify the unit.
·Use only genuine Hakko replacement parts.
·Do not wet the unit or use the unit with wet hands.
·Set the ceramic paper filter (S) for the filter retainer (station), and the
ceramic paper filter (L) for the filter pipe (gun).
·Maintain the desoldering gun and the station.
·While using the unit, don't do anything which may cause bodily harm
or physical damage.
·Do not touch the metal parts near the nozzle, nearby plastic parts and
the spring iron holder .
·Do not use the product near flammable items.
·Advise those in the work area that the unit can reach very high
temperatures and should be considered potentially dangerous.
·Turn the power OFF when no longer using the Hakko 470B or when
leaving it unattended.
·Before replacing parts or storing the unit, allow the unit to cool and then
turn the power OFF.

Cord Assembly
Connects to the receptacle (station).
Hose
Connects to the vacuum outlet cap (station).
Trigger
Squeeze to start absorption.
Do not pull the trigger before
fully heating the nozzle.
Heating Element
Inside requires cleaning.
Nozzle
Transmits heat for melting solder.
Entrance for melted solder.
Expendable part
Filter Pipe
Set the ceramic paper filter (L) (No. A1033).
Contains melted solder and flux using filters.
Filter are expendable parts.
Back Holder
Assembly
Secures the filter
pipe.
Release Knob
Push down to
remove the filter
pipe.
Indicator
Indicates when
nozzle and heating
element need
cleaning and when
filters need replacing.
Desoldering Gun
3
(Refer to p.19,20,21 for part nos.)Part Names

Station
4
Temperature Control Knob
Provides nozzle temperature
control. (refer to p.7)
Temperature Control Set
Screw Clamp
Prevents the temperature
control knob from being reset.
(refer to p.7)
Power Lamp
Lights up when the
power switch is
turned to ON.
Power Switch
When turned to ON,
the heating element
starts to heat up.
CAL (Calibration)
Used for calibrating
the temperature
after replacing the
Heating Element.
Receptacle
Connector for the cord
assembly.
Vacuum Outlet Cap
Set the ceramic paper filter (S)
(No, A1009).
Connects with the hose, Filter
inside vacuum outlet cap is
expendable.
Fuse Holder
·120V unit contains
250V-2A (U) fuse.
Power Cord

5
Operation
CAUTION
The spring iron holder becomes
extremely hot during operation of the
desoldering gun. Do not touch the
spring iron holder during and
immediately after using the gun.
CAUTION
The sponge is compressed.
It will swell when moistened with water.
Be sure to dampen the sponge with
water before use.
Be sure to remove the round portion
of the sponge.
Spring Iron Holder
(No. B1094) Cleaning Pin Holder
(No. B1095)
Securely insert the
cleaning pin holder.
Cleaning Sponge
Iron Holder Base
Tube (red)
Preparation–Assembly and Connection
Assemble the Hakko 470B on a flat surface.
Remove the pump securing
screws (M4x25 marked red)
from the bottom of the station.
Assemble the iron holder.
·Set the spring iron holder and
cleaning pin holder in the iron
holder base.
·Dampen the cleaning sponge
with water and then squeeze
it dry.
Insert the desoldering gun
and cleaning pins.
·Fully insert the desoldering
gun into the spring iron holder.

CAUTION
Be sure to turn the power switch off
before connecting or disconnecting
the cord assembly and the power
plug. Failure to do so may damage
the P.W.B.
CAUTION
The entire unit is constructed of
conductive materials. Always ground
the unit.
CAUTION :
The desoldering gun must be placed in the iron
holder when not in use.
The power lamp doesn’t
light up.
1. Is the power cord properly
connected?
2. Is the fuse blown?
The nozzle doesn’t heat up.
1. Is the cord assembly
properly connected?
2. Is the heating element
broken?
Secure the plug by
turning it clockwise.
Fully insert the hose
into the vacuum
outlet cap.
Insert the cord
assembly by keying
the plug to the key
on the receptacle.
The power lamp
lights up.
The nozzle heats up.
Connections
·Connect the cord assembly to
the receptacle (marked "IRON").
·Connect the hose to the
vacuum outlet cap (marked
"VACUUM").
Power switch
·Confirm that the power switch
is set in the OFF position, then
connect the power plug to the
power source.
·Turn the power switch to ON.
The power lamp should light
up.
·The nozzle begins to heat up
as soon as the power switch
is turned to ON.
After turning the power
switch to ON, wait three (3)
minutes before beginning
desoldering operations. 6

Always set the temperature to as low
as possible for the work being done.
CAUTION
Never insert the cleaning pin in the
hole of temp. control set screw clamp.
As this may result in damage to the
unit.
CAUTION
Desoldering
·The temperature control knob
can be secured by tightening
the temperature control set
screw clamp ("+ " screw) at
the top of the Hakko 470B unit.
·To more precisely set the tem-
perature, measure the temper-
ature at the nozzle using a
soldering iron thermometer and
adjust the temperature control
knob accordingly.
Set the temperature.
Clean the tip of the nozzle.
·Keep the solder-plated section
of the nozzle a shiny white by
coating it with a small amount
of solder.
We recommend the Hakko
191 thermometer or Hakko
192 soldering tester for
measuring the nozzle tem-
perature.
If the tip of the nozzle is
coated with oxide, the
nozzle's heat conductivity
will be lowered.
Coating the tip with a small
amount of fresh solder
ensures maximum heat
conductivity.
knob P.W.B.
1 ~ 2
5 ~ 6
3 ~ 4 Single-sided P.W.B. Through-hole P.W.B.
Multilayer P.W.B.
Please refer to the chart below, and adjust
the temperature control knob.
The temperature can be adjusted between
380˚C and 480˚C(716˚F and 896˚F)
with temperature control knob.
7
Operation
Lock
Unlock
Secure the temperature
control set screw clamp
with a cross point screwdriver,
Wipe away any oxide or old solder
from the nozzle using the hole in
the center of the sponge.
After turning the power switch to
ON, wait three (3) minutes before
beginning desoldering operations.

Never allow the nozzle to touch the
board itself.
CAUTION
To confirm that all the solder is melted,
observe the inside of the hole and the
backside of the P.W.B. If this is difficult
to do, try slowly moving the lead with
the nozzle-if the lead moves, the
solder is melted.
CAUTION
Never move the lead by force. If it
doesn't move easily, the solder isn't
yet fully melted.
CAUTION
Never leave any solder remaining
inside the hole in the P.W.B.
CAUTION
Absorb the solder by slowly
moving the lead back and
forth with the tip of the
nozzle.
Slowly move
the lead with
the nozzle.
Nozzle
P.W.B.
Solder
Lead
·Apply the nozzle to the soldered
part and melt the solder.
·Confirm that the solder is
melted.
Melt the solder.
Absorb the solder.
·After confirming that the solder
is completely melted, absorb
the solder by squeezing the
trigger on the gun.
·After fully absorbing all the
solder, cool the soldering junc-
tion in order to prevent it from
becoming resoldered.
·If solder remains, resolder the
component and repeat the
desoldering process.
Problems during
desoldering
8

The indicator will not operate accurately
if the hole of the nozzle is closed or if
the solder in the hole of the P.W.B. is
not melted.
CAUTION
The indicator on the Hakko 471 reads
in a different way.
For instructions on the reading the
Hakko 471 indicator, please refer to
the Hakko 471 instruction manual.
CAUTION
If there is a noticeable drop in suction
efficiency, clean the nozzle and heating
element with the cleaning pin.
CAUTION :
Normal Abnormal Solution
Blue or slight
amount of red
can be seen.
More than half
of the indicator
is red.
If the indicator is more
than half red, replace
the filter and clean the
nozzle and the inside
of the heating element.
(refer to p.12
Maintenance of the
Desoldering Gun)
Replace the entire filter pipe
with the provided backup filter pipe.
Cleaning during Operation
While looking at the indicator
and with the hole of the nozzle
open, pull the trigger and look
at the indicator. If it is red,
clean the nozzle and heating
element, empty the filter pipe,
and replace the filters. If the
indicator is blue, cleaning is
not necessary and operations
can be resumed.
Observing the indicator
Replacing the filter
Replace the filter as shown
. During operation, the filter pipe
is very hot. Wait until the filter pipe
is cool before replacing the filter.
We recommend keeping a second
filter pipe containing new filters
handy, and replacing the installed
filter pipe with this backup filter
pipe.
Pull
Down
9
Operation
Heated solder and flux can cause oxides to form and adhere
to the nozzle and the inside of the heating element. These
oxides not only lower the heat conductivity, but can also clog
the nozzle and heating element, resulting in a drop in suction
efficiency. Should there be a noticeable drop in suction efficiency
during operation, replace the filter and clean the nozzle and
heating element with the provided cleaning pin.

Remove all solder from the inside of the nozzle and
heating element.
Clean the tip of the nozzle with the cleaning sponge,
then coat the tip with a fresh layer of solder to protect
the solder plating.
Problems during Desoldering
Post-operation Maintenance
To ensure a long service life, always
perform the following maintenance
procedures immediately after using
the Hakko 470B unit.
10
A. The solder in the junction
is not sufficiently melted.
B. Suction power is dropping.
A. The solder in the junction is not sufficiently melted.
Temperature is not high enough.
Nozzle is worn out.
The following parts require a greater heat capacity to
desolder.
·Multilayer P.W.B.s, power supplies, ground planes in
through-hole P.W.B.s, high-capacity transistors, triacs
with heat radiation fins, tuner P.W.B. ground wires,
and large-scale transformer terminals.
Use a preheating oven or heating gun to heat the P.W.B. to
a temperature that won't damage the board or its compo-
nents [between 70˚C(160˚F) and 80˚C(180˚F)], then desol-
der. Do not increase the temperature of the gun by recalibra-
tion as this may damage the P.W.B. and its components.
·When the nozzle begins to wear out, the heating efficiency
begins to decline. Check the nozzle. If the solder plating
is damaged, or the nozzle is eroded, replace the nozzle.
(refer to p.12)
Air is leaking from the vacuum system.
Air leakage cannot be determined from the indicator.
Check the air-tightness of the following parts and replace
any that are worn.
a. Contact point of the
nozzle and heating
element
b. Front holder and nearby
parts
c. O-ring in the back holder
d. Hose
e. Vacuum outlet cap
f. Packing and nearby parts
B. Suction power is dropping.
·Replace the filters, and clean the nozzle and the inside
of the heating element. (refer to p.12~16, Maintenance
of Desoldering Gun and Station )

WARNING :
If the power cord is damaged, it must be replaced by
the manufacturer, its service agent or similarity
qualified person in order to avoid personal injury or
damage to the unit.
Troubleshooting Guide
11
Power lamp does not light up.
· Is the power cord plugged in correctly?
Securely insert the power cord into the power supply.
· Is the fuse blown?
Investigate why the fuse blew and then replace the fuse.
If the cause can not be determined, replace the fuse.
If the fuse blows again, send the unit in for repair.
Example Is the inside of the gun short-circuited?
Pump does not operate.
· Is the cord assembly properly connected?
Reconnect the cord assembly. (refer to p.6)
· Is the nozzle or hole in the heating element clogged?
Clean it. (refer to p.12)
Solder is not being absorbed.
· Is the spring filter full of solder?
Replace it with a new one. (refer to p.13)
· Is the ceramic filter hardened?
Replace it with a new one.
· Is there a vacuum leak?
Check the connections and replace any worn parts.
(refer to p.10)
The nozzle does not heat up.
· Is the desoldering gun cord assembly properly
connected?
Reconnect it. (refer to p.6)
· Is the heating element damaged?
Replace it. (refer to p.17)
Note : When repairs are needed please send both the desoldering gun
and the station to your sales agent.

WARNING : Since the desoldering gun can reach a very high temperature, please work carefully.
Except when cleaning the nozzle and heating element, always turn the power switch
off and disconnect the power plug before performing any maintenance procedure.
The desoldering gun will be extremely hot.
During maintenance, please wear gloves
and work carefully.
CAUTION
The cleaning pin will not pass through
the nozzle until the solder inside the
nozzle is completely melted.
CAUTION
The inside hole and the surface of the
nozzle is plated with a special alloy.
Should this alloy become eroded by
high-temperature solder, the nozzle
will not be able to maintain the proper
temperature.
CAUTION
·If the cleaning pin does not
pass through the hole in the
nozzle, clean with the cleaning
drill.
The cleaning pin passes
completely through the hole.
Cleaning with the nozzle cleaning pin.
Cleaning with the cleaning drill.
• Before cleaning
• After cleaning
Insert the bit while turning it clockwise.
Pull the drill bit out straight without turning it.
solder plating
Diameter of hole is
widened through erosion. Note
CAUTION
Please use the proper sized
cleaning pin or cleaning drill
for the nozzle diameter.
If the cleaning drill is forced
into the nozzle, the drill bit
could break or be damaged.
CAUTION
Unfortunately, it is often diffi-
cult to observe this condition.
Therefore, if desoldering effi-
ciency goes down and all oth-
er parts appear to be OK, the
nozzle is probably eroded and
should be replaced.
Servicing the Desoldering Gun
Inspect and clean the
nozzle.
·Plug in the power cord, turn
the power switch on and let the
nozzle heat up.
·Clean out the hole of the nozzle
with the nozzle cleaning pin.
·Check the condition of the
solder plating on the tip of the
nozzle.
·If it is slightly worn, recoat the
tip with fresh solder to prevent
oxidation.
·Check the condition of the
surface and inside hole of the
nozzle.
·If either is worn or eroded, or
the inside diameter seems
unusually wide, replace the
nozzle.
12
(Desoldering Gun)Maintenance
Properly maintained, the Hakko 470B desoldering gun should provide years of good service.
Efficient desoldering depends upon the temperature, and the quality and quantity of the solder
and flux. Perform the following service procedures as dictated by the conditions of the gunÕs usage.

The heating element is very hot
during operation.
CAUTION
·If the cleaning pin cannot pass
through the hole, replace the
heating element.
·Turn the power off after
cleaning.
CAUTION
The filter pipe is very hot.
CAUTION
@Disassemble the heating
element.
@Replace the filters.
·Turn the power switch OFF.
·When the filter pipe is cool to
the touch, push down the
release knob at the back of
the gun and remove the filter
pipe.
@Clean out the hole in the
heating element with the
provided cleaning pin.
Be sure the solder in the hole in the
heating element is completely heated,
before cleaning the hole.
·Examine the front holder.
·Examine the spring filter.
·Examine the ceramic paper
filter (L). (No. A1033)
Replace
Stiff and cracked.
Replace
Solder is collected in two-thirds of the spring filter.
Replace
Ceramic paper filter is stiff with flux and solder.
13
Heating Element Element Cover
Remove the nut with the attached spanner.
Nozzle Nut
Scrape away all oxidation from the hole in the heating element until
the cleaning pin passes cleanly through the hole.
The cleaning pin passes cleanly
and completely through the hole.
Front Holder
Spring Filter Ceramic Paper
Filter (L)
(No. A1033)

Be sure the front holder is correctly
aligned.
CAUTION
Use the ceramic paper filter (L) for the
filter pipe (gun). Using of the ceramic
paper filter (S) in the filter pipe may
cause to break or the power to drop.
CAUTION
If the nut is loose, air will leak and
the temperature will drop.
CAUTION
·Attach the spring filter to the
front holder.
·Attach the front holder to the
filter pipe.
Secure the filters.
Assemble the heating
element.
·Attach the nozzle and securely
tighten the nut with the
attached spanner.
14
Attach the front holder to the filter pipe
so that it does not leak air.
Firmly press the back holder assembly
into the filter pipe in order to properly
seat the O-ring against the pipe.
Ceramic Paper
Filter (L)
(No. A1033)

Set the ceramic paper filter (S) for the
filter retainar (station).
Using the ceramic paper filter (L) in
the filter retainer may cause to break
or the power to drop.
CAUTION
VACUUM
Filter Retainer
Cleaning the inside of the Filter Case
Replace the ceramic
paper filter (No. A1009).
Reassemble the filter case.
Remove the ceramic paper
filter and inspect it. If it is stiff
with flux, replace it.
Ceramic Paper
Filter (S)
(No. A1009)
Remove the filter retainer
and push out the ceramic
paper filter.
Ceramic Paper
Filter (S)
(No. A1009) Secure the vacuum outlet cap.
Apply silicone grease to the O-ring (S20) and securely tighten
the vacuum outlet cap to prevent air leakage.
15
(Station)Maintenance

If the fixing plate is difficult to remove,
apply hot air to it to warm it up.
Never use excessive force to remove
the plate as it is easy to bend, and a
bent plate will allow air to leak out and
reduce solder vacuuming efficiency.
CAUTION
Clean the plates only with alcohol or
thinner.
CAUTION
When assembling the pump, be sure
to check for air leaks.
CAUTION
Unplug the power cord before
starting this procedure.
WARNING
Replace:
If the valve plate is bent or stiff,
replace it.
·If the exhaust filter is dirty,
replace it.
Cleaning the Pump
Disassemble the pump
heads.
Clean the pump head.
·Remove the valve plate and
fixing plate.
·Remove any flux adhering to
the plates.
Assemble the pump heads.
·Remove the rear panel.
·Remove the cover.
·Remove the pump head from
each side of the pump.
Reassemble the valve plate
and fixing plate.
16
Cover
Remove
the cover screws.
(right / left)
Remove
the screws.
Rear Panel
Clean the pump head
and fixing plate.
Fixing Plate
Valve Plate
Exhaust Filter Pump Head
Pump Head
Valve Plate
Fixing Plate
Be sure the parts are
aligned correctly.

Unplug the power cord before
starting this procedure.
CAUTION
Replacing the Heating Element
Disassemble the heating
parts.
Separate the housing.
Detach the terminal and
remove the heating
element.
17
Replacement Parts
Glass Tube
Detach
the terminal.
The resistance value of a
working heating element is 2-4
at 23˚C(73˚F). If the value
you get is outside this range,
replace the heating element.
Unscrew the screws.
Housing
Remove the Filter Pipe.

18
CAUTION
Before reassembling enclosure,
make sure connectors are completely
covered by the glass tube.
Cover the glass tube
on the connecting part.
Position the leads in groove
and press them into place.
Be careful that the leads do not
get caught in the housing.
Bend the lead
before inserting it.
push in.
Insert a new heating
element and reassemble.
(Heating element 24V-50W)
Recalibrate the tempera-
ture.
The resistance of new heating
element varies, resulting in
variations in operating tem-
peratures. It is necessary to
recalibrate the temperature
every time the heating element
is replaced.
· Set the temperature control
knob to 1 and allow the gun
to warm up for three (3)
minutes.
· Using a tip thermometer,
adjust the temperature
calibrator (marked 'CAL')
until the nozzle temperature
reads 380˚C(716˚F).
Adjust the temperature calibrator
(CAL) with a straight-edge (-)
screwdriver. Low
High

Pan Head Screw
with Washer
M 3 x 6 (4)
Pan Head Screw
with Washer
M 4 x 10 (8) Flat Head Screw
M 4 x 8 (4)
Hexagon Socket Set
Screw
M 4 x 6
Pan Head Screw
with Washer
M3x6 25 26
27 28
32
31
33
34
35
37 36
29
30
39
Flat Head Screw
M 4 x 12 (2)
1A1009
B1029 Vacuum Outlet Cap
2Ceramic Paper Filter (S) 10 pcs.
B1063
3Filter Retainer
B1031
4Vacuum Outlet Retainer With O-ring (S20) with screws
B1034
5O-ring (S20)
B1038
6Cover for Securing Screw set of 4
B1036
7Receptacle
B1028
8Knob With screw
B2438
9Front Panel With screws
B1093
10
11
12
13
Cover one side
B1061 Handle one side
B1044
Temp. Control Set Screws Clamp With screws
B2443 P.W.B. With potentiometer
Item No. Part No. Part Name Description
B2063 Hose Assembly
Transformer
B2078 120-24V
B2444 Pump Assembly
B2446 Rear Panel With Rating Seal
B1041 Fuse Holder Without Fuse
Fuse
B1275 250V-2A (U)/120V
Item No. Part No. Part Name Description
14
15
16
17
18
19
19
(Station)Parts List
Pan Head Screw
M 5 x 10 (4)
Internal Tooth Lock Washer
nominal size 4 (2)
Truss Screw (Zn, black)
M 4 x 5 (2)
17
18
19
20
Note: Spare or repair parts do not include mounting screws, if they are not listed on the description.
Screws must be ordered separately.
Pan Head Screw
with Washer
M 3 x 6 (2)
B2068 Power Cord 3 Core & American Plug
B2445 Chassis
B1037 Rubber Stopper set of 4
B1084 Switch
B1078
24
25
26
Potentiometer
B1053 Balance Weight
B1312 Crank With Bearing
Part No. Part Name Description
Item No.
20
21
22
23
B2060
B1057 Ring for Bearing
Crank Shaft With a screw
B2059 Pump Frame
B2058 Motor
B2085 Diaphragm Setting Plate
A1013 Diaphragm set of 2 with screws
B1056 Fixing Plate
A1014 Valve Plate set of 2
B1050 Pump Head With screws
B1059
36
37
38
Exhaust Filter set of 2
B1313 Filter Retaining Pin
B1064 Filter Case Joint
39 B2506 Damper set of 2
Item No. Part No. Part Name Description
27
28
29
30
31
32
33
34
35
20
Pan Head Screw
with Washer
M 4 x 8
Pan Head Screw
M 3 x 55
Pan Head Screw
M 5 x 10 (4)
Tapping Screw
M 2.6 x 6 (4)
Tapping Screw
M 2.6 x 6 (2)
Spacer
nominal
size 4 x 25
Pan Head Screw
with Washer
M 4 x 8 (2)
Pan Head Screw
with Washer
M 4 x 30
External
Tooth Lock
Washer
nominal size
4
Pan Head Screw
M 4 x 25 (4)
11
10
12
13
24
6
9
23
8
7
1
2
3
45
22
21
14
15
16
38
Spring Washer
nominal size 4 (4)
Pan Head
Screw
with Washer
M 4 x 8
Hexagon Nut
M 4 (4)