user14288: Is it possible to attain stream-entry if one is only following "the 5 precepts"?
Are there any suttas that seem to address this question?

user13709: In SN55.23 Mahānāma asks about stream-entry. After giving the standard answer of experiential confidence in the Buddha, Teaching and Sangha, Mahānāma persists and asks for more detail. Godha explains further:

“Godhā, a person must have four things for me to recognize them as a stream-enterer.
  What four?
  It’s when a noble disciple has experiential confidence in the Buddha …
  the teaching …
  the Saṅgha …
  And they have the ethical conduct loved by the noble ones … leading to immersion.
  When a person has these four things I recognize them as a stream-enterer.”

Ethical conduct is guided by precepts. Five is a great start. Undertaking more precepts has greater benefit and will deepen study. 
Precepts are not about self-mortification. Precepts are guides for wholesome behavior. For example, the precept to not kill might lead one to consider being a vegetarian out of compassion for animals instead of gorging on steak. 
Precepts aren't about scoring high on merit--they are just thought guides and references that allow us to examine our motivations with clarity and an open heart.
Therefore to answer your question...
Since the five precepts guide ethical conduct, you would still need the first three things. You would also need experiential faith in the Buddha, the Teaching and the Sangha.

user43: "entering the stream" means you understood the main point of Buddhism and started applying that point to your entire life.
Which point? -- That you should stop creating causes for future dukkha.
Which causes create dukkha? -- Whatever leads to increase of conflict, increase of side-taking, increase of attachment, increase of obsession, increase of aversion, increase of ignorance - leads to increase of dukkha. Whatever leads to maintenance of conflict, maintenance of side-taking, maintenance of attachment, maintenance of obsession, maintenance of aversion, maintenance of ignorance - leads to maintenance of dukkha. Whatever leads to cessation of conflict, cessation of side-taking, cessation of attachment, cessation of obsession, cessation of aversion, cessation of ignorance - leads to cessation of dukkha. 
The nature of dukkha is conflict, clash, mismatch - so if you are setting in motion forces that will set up conditions for arising of conflict, clash, mismatch - then that's what you will get. Once you get that - there's suffering. Correspondingly, when you are laying down causes in the here and now that are by nature conducive to harmony - then that's what you'll get. It is that simple. We create Dukkha by ourselves, so once we stop creating Dukkha we may still get some Dukkha created in the past, but eventually all the past causes will run out and the new causes will come to effect, and so gradually we will attain the natural harmonious state - Nirvana.
Once you really "get" this, once you see it clearly, then you stop acting like that, because you know it's for your own benefit. It's not just blindly following the five precepts. It's about getting the principle. Sometimes you may still make mistakes and create trouble - but as long as you got the principle in the overall - you will keep making progress.
This is when we say you are "in the stream" leading to Nirvana.

user471: The Vera Sutta (AN 10.92) (quoted below) lists out the criteria for stream entry:

Five forms of fear and animosity are stilled (i.e. the effect of consistently and heedfully practising the five precepts)
Four factors of stream entry
Rightly seen and rightly ferreted out the noble method (i.e. understood dependent origination thoroughly through insight)

The four factors of stream entry are verified confidence (or experiential confidence) in the Buddha, Dhamma (the teaching) and Sangha, as well as, being endowed with the virtues appealing to the noble ones.
From the Vera Sutta (AN 10.92):

Then Anathapindika the householder went to the Blessed One and, on
  arrival, having bowed down to the Blessed One, sat to one side. As he
  was sitting there, the Blessed One said to him, "When, for a disciple
  of the noble ones, five forms of fear & animosity are stilled; when he
  is endowed with the four factors of stream-entry; and when, through
  discernment, he has rightly seen & rightly ferreted out the noble
  method, then if he wants he may state about himself: 'Hell is ended;
  animal wombs are ended; the state of the hungry shades is ended;
  states of deprivation, destitution, the bad bourns are ended! I am a
  stream-winner, steadfast, never again destined for states of woe,
  headed for self-awakening!'
"Now, which five forms of fear & animosity are stilled?
"When a person takes life, then with the taking of life as a requisite
  condition, he produces fear & animosity in the here & now, produces
  fear & animosity in future lives, experiences mental concomitants of
  pain & despair; but when he refrains from taking life, he neither
  produces fear & animosity in the here & now nor does he produce fear &
  animosity in future lives, nor does he experience mental concomitants
  of pain & despair: for one who refrains from taking life, that fear &
  animosity is thus stilled.
"When a person steals... engages in illicit sex... tells lies...
"When a person drinks distilled & fermented drinks that cause
  heedlessness, then with the drinking of distilled & fermented drinks
  that cause heedlessness as a requisite condition, he produces fear &
  animosity in the here & now, produces fear & animosity in future
  lives, experiences mental concomitants of pain & despair; but when he
  refrains from drinking distilled & fermented drinks that cause
  heedlessness, he neither produces fear & animosity in the here & now
  nor does he produce fear & animosity in future lives, nor does he
  experience mental concomitants of pain & despair: for one who refrains
  from drinking distilled & fermented drinks that cause heedlessness,
  that fear & animosity is thus stilled.
"These are the five forms of fear & animosity that are stilled.

Additional question from a comment:

OP: Would experiential faith in the Buddha, the Teaching, the Sangha and following the 5 precepts be enough for stream-entry?

No. All the criteria listed above are required.

14288: <p>Is it possible to attain stream-entry if one is only following "the 5 precepts"?</p>

<p>Are there any suttas that seem to address this question?</p>
 13709: <p>In <a href="https://suttacentral.net/sn55.23/en/sujato" rel="nofollow noreferrer">SN55.23</a> Mahānāma asks about stream-entry. After giving the standard answer of experiential confidence in the Buddha, Teaching and Sangha, Mahānāma persists and asks for more detail. Godha explains further:</p>

<blockquote>
  <p>“Godhā, a person must have four things for me to recognize them as a stream-enterer.
  What four?
  It’s when a noble disciple has experiential confidence in the Buddha …
  the teaching …
  the Saṅgha …
  And they have the <strong>ethical conduct loved by the noble ones</strong> … leading to immersion.
  When a person has these four things I recognize them as a stream-enterer.”</p>
</blockquote>

<p>Ethical conduct is guided by precepts. Five is a great start. Undertaking more precepts has greater benefit and will deepen study. </p>

<p>Precepts are not about self-mortification. Precepts are guides for wholesome behavior. For example, the precept to not kill might lead one to consider being a vegetarian out of compassion for animals instead of gorging on steak. </p>

<p>Precepts aren't about scoring high on merit--they are just thought guides and references that allow us to examine our motivations with clarity and an open heart.</p>

<p>Therefore to answer your question...</p>

<p>Since the five precepts guide ethical conduct, you would still need the first three things. You would also need experiential faith in the Buddha, the Teaching and the Sangha.</p>
 43: <p>"entering the stream" means you understood the main point of Buddhism and started applying that point to your entire life.</p>

<p>Which point? -- That you should stop creating causes for future dukkha.</p>

<p>Which causes create dukkha? -- Whatever leads to increase of conflict, increase of side-taking, increase of attachment, increase of obsession, increase of aversion, increase of ignorance - leads to increase of dukkha. Whatever leads to maintenance of conflict, maintenance of side-taking, maintenance of attachment, maintenance of obsession, maintenance of aversion, maintenance of ignorance - leads to maintenance of dukkha. Whatever leads to cessation of conflict, cessation of side-taking, cessation of attachment, cessation of obsession, cessation of aversion, cessation of ignorance - leads to cessation of dukkha. </p>

<p>The nature of dukkha is conflict, clash, mismatch - so if you are setting in motion forces that will set up conditions for arising of conflict, clash, mismatch - then that's what you will get. Once you get that - there's suffering. Correspondingly, when you are laying down causes in the here and now that are by nature conducive to harmony - then that's what you'll get. It is that simple. We create Dukkha by ourselves, so once we stop creating Dukkha we may still get some Dukkha created in the past, but eventually all the past causes will run out and the new causes will come to effect, and so gradually we will attain the natural harmonious state - Nirvana.</p>

<p>Once you really "get" this, once you see it clearly, then you stop acting like that, because you know it's for your own benefit. It's not just blindly following the five precepts. It's about getting the principle. Sometimes you may still make mistakes and create trouble - but as long as you got the principle in the overall - you will keep making progress.</p>

<p>This is when we say you are "in the stream" leading to Nirvana.</p>
 471: <p>The <a href="https://www.accesstoinsight.org/tipitaka/an/an10/an10.092.than.html" rel="nofollow noreferrer">Vera Sutta (AN 10.92)</a> (quoted below) lists out the criteria for stream entry:</p>

<ul>
<li>Five forms of fear and animosity are stilled (i.e. the effect of consistently and heedfully practising the five precepts)</li>
<li>Four factors of stream entry</li>
<li>Rightly seen and rightly ferreted out the noble method (i.e. understood <a href="https://buddhism.stackexchange.com/q/48/471">dependent origination</a> thoroughly through insight)</li>
</ul>

<p>The four factors of stream entry are verified confidence (or experiential confidence) in the Buddha, Dhamma (the teaching) and Sangha, as well as, being endowed with the virtues appealing to the noble ones.</p>

<p>From the <a href="https://www.accesstoinsight.org/tipitaka/an/an10/an10.092.than.html" rel="nofollow noreferrer">Vera Sutta (AN 10.92)</a>:</p>

<blockquote>
  <p>Then Anathapindika the householder went to the Blessed One and, on
  arrival, having bowed down to the Blessed One, sat to one side. As he
  was sitting there, the Blessed One said to him, "When, for a disciple
  of the noble ones, five forms of fear &amp; animosity are stilled; when he
  is endowed with the four factors of stream-entry; and when, through
  discernment, he has rightly seen &amp; rightly ferreted out the noble
  method, then if he wants he may state about himself: 'Hell is ended;
  animal wombs are ended; the state of the hungry shades is ended;
  states of deprivation, destitution, the bad bourns are ended! I am a
  stream-winner, steadfast, never again destined for states of woe,
  headed for self-awakening!'</p>
  
  <p>"Now, which five forms of fear &amp; animosity are stilled?</p>
  
  <p>"When a person takes life, then with the taking of life as a requisite
  condition, he produces fear &amp; animosity in the here &amp; now, produces
  fear &amp; animosity in future lives, experiences mental concomitants of
  pain &amp; despair; but when he refrains from taking life, he neither
  produces fear &amp; animosity in the here &amp; now nor does he produce fear &amp;
  animosity in future lives, nor does he experience mental concomitants
  of pain &amp; despair: for one who refrains from taking life, that fear &amp;
  animosity is thus stilled.</p>
  
  <p>"When a person steals... engages in illicit sex... tells lies...</p>
  
  <p>"When a person drinks distilled &amp; fermented drinks that cause
  heedlessness, then with the drinking of distilled &amp; fermented drinks
  that cause heedlessness as a requisite condition, he produces fear &amp;
  animosity in the here &amp; now, produces fear &amp; animosity in future
  lives, experiences mental concomitants of pain &amp; despair; but when he
  refrains from drinking distilled &amp; fermented drinks that cause
  heedlessness, he neither produces fear &amp; animosity in the here &amp; now
  nor does he produce fear &amp; animosity in future lives, nor does he
  experience mental concomitants of pain &amp; despair: for one who refrains
  from drinking distilled &amp; fermented drinks that cause heedlessness,
  that fear &amp; animosity is thus stilled.</p>
  
  <p>"These are the five forms of fear &amp; animosity that are stilled.</p>
</blockquote>

<p>Additional question from a comment:</p>

<blockquote>
  <p><strong>OP:</strong> Would experiential faith in the Buddha, the Teaching, the Sangha and following the 5 precepts be enough for stream-entry?</p>
</blockquote>

<p>No. All the criteria listed above are required.</p>
