Verpak elk onbeschadigd onderdeel goed.

Because this is a command/instruction. In Dutch, commands usually begin with the verb, just like in English:

• Verpak ... = Pack ...
• Lees ... = Read ...
• Controleer ... = Check ...

The subject is normally left out in commands. So Dutch does not need to say jij or u here.

This is especially common in manuals, instructions, labels, and recipes.

Verpak is the imperative form of the verb verpakken.

For a regular verb, the imperative is usually the bare stem:

• infinitive: verpakken
• stem: verpak
• imperative: Verpak!

Compare:

• werken → werk
• controleerden no, sorry? better: controleren → controleer
• pakken → pak

So verpak is the correct form for a direct instruction.

Because onderdeel is a het-word:

• het onderdeel

With singular het-words, Dutch uses elk. With singular de-words, Dutch uses elke.

Examples:

• elk onderdeel
• elk apparaat
• elke doos
• elke machine

So the form elk tells you that onderdeel is neuter.

Because elk means each/every, and in Dutch it is followed by a singular count noun.

So:

• elk onderdeel = each individual part
• alle onderdelen = all the parts

Both can be possible in context, but they are not the same structure:

• elk + singular
• alle + plural

Here the sentence focuses on each part one by one.

This is an adjective-ending question.

Onbeschadigd comes before a singular het-word (onderdeel) in an indefinite phrase, so the adjective usually has no -e ending.

That is why you get:

• elk onbeschadigd onderdeel

But compare:

• het onbeschadigde onderdeel
• dit onbeschadigde onderdeel
• elke onbeschadigde doos

So the missing -e is not random; it follows a grammar pattern.

It has two parts:

• beschadigd = damaged
• prefix on- = un- / not

So onbeschadigd means undamaged or not damaged.

This on- prefix is very common in Dutch:

• mogelijk → onmogelijk
• bekend → onbekend
• veilig → onveilig

So it is a useful pattern to recognize.

Here goed is an adverb, not an adjective. It describes how you should pack the part: properly, well, securely.

So it modifies the verb verpak.

Dutch often places this kind of adverb later in the sentence, and putting it at the end sounds very natural here:

• Verpak het goed.
• Controleer het goed.
• Sluit de doos goed.

So goed here does not describe the noun onderdeel. It describes the action of packing.

Yes, that is possible.

Dutch often uses both:

• verpakken
• inpakken

They overlap in meaning, but there can be a slight nuance:

• verpakken often sounds a bit more formal or technical
• inpakken often emphasizes wrapping or packing something up

In an instruction manual, verpak sounds very natural.
With inpakken, the separable verb splits in the sentence:

• infinitive: inpakken
• command: Pak ... in

So Pak elk onbeschadigd onderdeel goed in is grammatically correct and very understandable.

No. In instructions, manuals, warning labels, and work procedures, the bare imperative is completely normal and not rude.

Dutch often uses direct imperatives in practical writing:

• Open de doos voorzichtig.
• Gebruik geen scherpe voorwerpen.
• Bewaar op een droge plaats.

In conversation, you might soften it with alsjeblieft or phrase it differently, but in written instructions this direct style is standard.

In an instruction like this, verpak is neutral. It is not especially informal.

A bare imperative is very common in:

• manuals
• packaging instructions
• safety notices
• recipes

So even though Dutch also has polite ways to address someone, this sentence does not sound casually informal. It sounds like standard instructional Dutch.