Inspiron 15 3521 Service Manual

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Screw list

NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.

NOTE: Some computers have magnetic surfaces. Ensure that the screws are not left attached to such surfaces when replacing a component.

NOTE: Screw color may vary with the configuration ordered.

Table 1. Screw listThe following table provides the different screws that are used in your Inspiron 15 3521.
Component	Screw type	Quantity	Screw image
Base cover	M2x5 Captive screw	6 2
3-cell battery/4-cell battery	M2x3	3/4
M.2 2230/2280 solid-state drive	M2x2	1
2.5-inch hard-disk drive 2.5-inch hard-disk drive bracket	M2x3.5 M3x3	4 4
Wireless-card	M2x3.5	1
System board thermal plate	M2x5 M2x3	2 4
Touchpad bracket Touchpad	M2x2 M2x2	3 2
Display assembly	M2.5x5	4
Display hinges	M2.5x3.8	6
System board	M2x2 M2x3.5	1 3
I/O daughter-board	M2x3.5	3
Power button	M2x2	1
Power button with optional fingerprint reader	M2x2	1
Power-adapter port	M2.5x5	2