Required Tools; Types Of Screws - HP LaserJet PRO M521 Repair Manua

Required tools

#2 Phillips 152 mm (6 in) screwdriver with magnetic tip
●
#2 Phillips 76 mm (3 in) screwdriver with magnetic tip
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Small flat-tip screwdriver
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Small needle-nose pliers
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ESD mat
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Penlight
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CAUTION:
(callout 2) or any motorized screwdriver. These can damage screws or screw threads.
Figure 1-1

Types of screws

NOTE: The illustration in this section are for reference only. The screws in your product might look
slightly different.
Illustration
ENWW
Always use a Phillips screwdriver (callout 1). Do not use a Pozidriv® screwdriver
Phillips and Pozidriv screwdriver comparison
Description
Screw
Screw
Screw, tapping
Screw, tapping, truss
head
Size Part number
M3X6 0515-2908
M3X8 0515-4681
P-M3X6 0515-5621
M4X14 0515-4672
Removal and replacement strategy
Use
Used to secure metal
components to metal
components (for
example, a ground
wire to the frame)
Used to secure
anything to plastic
3