הבורג הזה רופף, ולכן צריך לחזק אותו עם מברג.

A common pronunciation guide would be:

ha-boreg ha-ze rofef, ve-lakhen tsarikh lekhazek oto im mavreg.

A more fully pointed version is:

הַבּוֹרֶג הַזֶּה רוֹפֵף, וְלָכֵן צָרִיךְ לְחַזֵּק אוֹתוֹ עִם מַבְרֵג.

A few pronunciation notes:

• הזה = ha-ze
• רופף = rofef
• צריך = tsa-rikh
• אותו = o-to
• מברג = mav-reg

Because in Hebrew, the verb to be is usually omitted in the present tense.

So:

• הבורג הזה רופף literally looks like the screw this loose
• but it means This screw is loose

This is completely normal Hebrew. The same pattern appears in many sentences:

• הילד עייף = The boy is tired
• הדלת פתוחה = The door is open

If you want past or future, Hebrew does use forms of to be:

• הבורג הזה היה רופף = This screw was loose
• הבורג הזה יהיה רופף = This screw will be loose

In Hebrew, when you use this/that with a noun, the noun is usually definite, so it takes ה־.

So:

• הבורג הזה = this screw
• הספר הזה = this book
• הבית ההוא = that house

For an English speaker, this can feel repetitive, because English does not say the this screw. But in Hebrew, this is the normal structure.

That is the standard Hebrew word order for demonstratives like this and that.

Hebrew usually says:

• הבורג הזה = this screw
• האישה הזאת = this woman
• הילדים האלה = these children

So unlike English, the noun comes first, and this/that comes after it.

רופף is an adjective meaning loose.

Here it is in the masculine singular form, because בורג is a masculine singular noun.

Agreement in Hebrew works like this:

• masculine singular: רופף
• feminine singular: רופפת
• masculine plural: רופפים
• feminine plural: רופפות

So if the noun changed, the adjective would also change:

• ההברגה רופפת = The threading is loose / The fitting is loose
• הברגים רופפים = The screws are loose

ולכן means and therefore, and so, or therefore.

It is made of:

• ו־ = and
• לכן = therefore / so

So the sentence is connecting two ideas:

1. The screw is loose
2. therefore, it needs to be tightened

לכן is perfectly normal, but it can sound a little more formal or written than אז in everyday speech.

Compare:

• הבורג הזה רופף, ולכן צריך לחזק אותו = a bit more formal/neutral
• הבורג הזה רופף, אז צריך לחזק אותו = more conversational

Because צריך can be used impersonally, meaning something like:

• it is necessary to
• one needs to
• you need to (in a general sense)

So:

• צריך לחזק אותו = it is necessary to tighten it / you need to tighten it

Hebrew often leaves the subject unstated when it is general or obvious from context.

Also, צריך is in the masculine singular default form here. That is very common in general statements.

If you wanted to specify a person, you could:

• אתה צריך לחזק אותו = You (masculine singular) need to tighten it
• את צריכה לחזק אותו = You (feminine singular) need to tighten it
• אני צריך לחזק אותו = I need to tighten it (speaker is male)
• אני צריכה לחזק אותו = I need to tighten it (speaker is female)

Its basic meaning is to strengthen or to reinforce, but in context it can mean to tighten or to secure more firmly.

So in this sentence, לחזק אותו is understood as tighten it / make it more secure.

That said, for a screw, many speakers might also use:

• להדק = to tighten
• לחזק = to tighten / secure / make firmer

So the given sentence is understandable and natural, but להדק את הבורג may sound even more specifically mechanical.

אותו means him or it as a direct object, masculine singular.

Here it refers back to הבורג:

• לחזק אותו = to tighten it

Because בורג is masculine singular, the pronoun is אותו.

Other forms include:

• אותה = her / it (feminine singular)
• אותם = them (masculine or mixed plural)
• אותן = them (feminine plural)

So if the noun were feminine:

• הידית הזאת רופפת, ולכן צריך לחזק אותה = This handle is loose, so it needs to be tightened

Because אותו already functions as the direct-object pronoun by itself.

Compare:

• לחזק את הבורג = to tighten the screw
• לחזק אותו = to tighten it

You do not say:

• לחזק את אותו for this meaning

For English speakers, it helps to think of אותו as already containing the object idea. It is the normal pronoun form after a verb.

Yes, עם מברג is perfectly understandable and natural.

It literally means with a screwdriver:

• עם = with
• מברג = screwdriver

You may also hear:

• בעזרת מברג = with the help of a screwdriver
• באמצעות מברג = by means of a screwdriver

Those alternatives can sound a little more explicit or formal. In everyday speech, עם מברג is simple and good.

The given sentence is natural, but Hebrew has some flexibility.

This version:

• הבורג הזה רופף, ולכן צריך לחזק אותו עם מברג

could also be said as:

• הבורג הזה רופף, אז צריך לחזק אותו עם מברג
• צריך לחזק את הבורג הזה עם מברג, כי הוא רופף
• הבורג הזה רופף, וצריך לחזק אותו

The exact choice depends on tone, emphasis, and how formal or conversational you want to sound.

The original sentence is clear and well-formed.