There was a minor kerfuffle in the Western Terrace at the end of the day, with Eranga struck by an object from the crowd as he fielded on the boundary.
"I've got it but I'll cut a bit of the seam off for Stuart," he said. "I didn't ask him, I just took it to be fair.
The seamer had Kumar Sangakkara well caught by Ian Bell from the last ball of his 12th over then returned to snare Dinesh Chandimal and Shaminda Eranga at the start of his next visit, a key contribution as the tourists were dismissed for 257.
"I had no idea," he told Sky Sports. "I was listening to the guy that came on the tannoy there and I was thinking 'why is he mentioning the last ball of the over before?', and it clicked that that might be a hat trick."
Confident"I feel like it's just the start. I feel confident and when you're a bit younger maybe you don't. I backed myself."
That honour went to Liam Plunkett, who returned five for 64 on his second Test back after a seven year absence.
"He chucked me the ball when the announcement came so he's given me the ball, or I think he has anyway."
Stuart Broad became the first Englishman to take two Test Reebok Girls
paceman bowled Reebok Kids with genuine hostility on his way to personal best Test figures and fully justified the selection panel's continued faith after last week's draw at Lord's.
wanted to perform at Test level and picking up five feels like I've done that.
But his was not even the stand out performance of the innings.
"As soon as I played last week I felt part of it again, from the first net session," he said. "This was more for me, I Saucony Jazz 91 On Feet
Stuart Broad in the dark over magnificent achievement
hat tricks on day one of the second Test against Sri Lanka, but admitted he was unaware of his own achievement.
Asked who had won the battle for the match ball him for his maiden five for or Broad for his rare feat Plunkett showed a wide grin.
Broad, who first took three in three against India at Trent Bridge in 2011, is just the fourth bowler in history to do so twice following Hugh Trumble, Jimmy Mattews and Wasim Akram.
Saucony Blue And Orange