The alleged abuse, residents say, is aimed at creating a climate of fear after India stripped the long-restive, blood-soaked Himalayan region of its autonomy on August 5.
Khan, 26, from Hirpora village in Shopian district, says he was dragged out and blindfolded along with his brother, who has learning difficulties, on August 14.
"They gave electric shocks to my brother right on the road outside. I heard him scream painfully," Khan told AFP, showing marks on his arms, legs and buttocks.
Once inside the nearby Chowgam army camp, Khan said soldiers stripped him naked, tied up his legs and wrists, suspended him and beat him with rods.
The camp major, Khan said, accused him of inviting Riyaz Naikoo from Hizbul Mujahideen - one of several militant groups fighting Indian rule - to his recent marriage.
An uprising in IOK has killed tens of thousands since 1989, mostly civilians.
"I kept repeating that was not true," Khan said. "Then they gave me electric shocks again on my genitals and wounds. One of them said 'I will make you impotent'."
After being released at dawn and barely able to stand - Khan says he kept vomiting for 10 days and only managed to start moving around again after 20 days.
"I can't eat properly anymore," he said. "I don't go into the room my wife sleeps in anymore... It's better to die with a bullet than undergo such torture."
New Delhi claims its IOK lockdown since last month, with mobile service and the internet still snapped in most areas, is to prevent "terrorists" from stirring up trouble.
India's national security advisor has denied that the military has committed any atrocities, a statement echoed by Colonel Rajesh Kalia, an army spokesman in occupied Kashmir.
"All counter-terrorism operations are conducted in the most professional and people-friendly manner. Allegations of manhandling levelled against the army are completely baseless," Kalia told AFP.
But people in Hirpora say they often hear screams from the army camp at night.
Three other villagers told AFP they were also tortured. In total, around two dozen young men in the villages of Shopian told similar stories.
Recounting stories of torture by Indian troops
"The army is making examples of two or three young men from each village," said one resident of Shopian who has compiled a list.
The pattern is often of soldiers raiding homes, taking identity cards and mobiles and telling young men to report to the camps to retrieve them.
One 21-year-old, who declined to be named but shared with AFP photos of his wounds, said he has reported to the Pahnoo camp three times since August 27 and was abused each time.
An officer accused of him of giving food to freedom fighters and then offered him money for information, he said. Another time, he was grilled about a former classmate who is now a freedom fighter.
"They gave me electric shocks inside a dark room for about two hours," the man said, showing scars on his forearm.
Obaid Khan, also 21, from Gugloora village said he had to go to the same camp to retrieve his ID and phone on August 26.
"Eight soldiers kept beating me with rods for a long time. Before they let me go, they asked me to come back with names of stone throwers in my village," he said, referring to protesters who clash with security forces.
Kashmir suffers under violent Indian army crackdown: BBC
Sajjad Hyder Khan, a local official in Pinjoora village told AFP he has seen a list of 1,800 people detained by police and soldiers from Shopian alone, one of the four districts in the southern Kashmir Valley.
Not far from his home in Shopian town, five soldiers in black with "COMMANDO" on their sleeves and carrying assault rifles were going house to house, seeking details of residents.
"In my humble subdued voice, all I can say is that the pressure is there in order to prevent people from protesting," said Khan, the Pinjoora official.
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