Disgusted Sharon Neat, 35, has blasted the fried chicken chain after she made the disgusting discovery during family outing with her husband, nan, uncle and three children. 

She spent more than £35 on two barbecue pulled chicken meals, three boneless banquets, two barbecue wraps and one lunch box meal.

Husband Daniel, 35, began tucking into the chicken burger and passed it to his daughter Leah, 7, to have a bite.

But when she passed it back, factory manager Mr Neat was shocked to find a metal bolt embedded in the middle. 

Mrs Neat, a dinner lady, said: "It was my husband's burger but you know what children are like.

"My daughter said 'Dad can I have a bite' so she did and when she passed it back he said 'there's a nut in that'.

"I said 'people can be allergic to that' and my husband said 'no, it's a metal nut'."

Mrs Neat marched straight back into the restaurant and was given a full refund, plus the telephone number for head office following the incident on Sunday. 

A full investigation has been launched by the fast-food chain - but the mother-of-three has claimed she will never step back into the KFC in Gravesend, Kent, again.

"It's not the sort of thing you expect to find in your burger. It really has put the children off eating there again," she added. 

In a statement, a KFC spokesman apologised to the Neat family but reassured customers the business "had very good hygiene standards."

He said: "We take food safety extremely seriously and immediately launched an investigation into the matter to determine whether the object originated in store, which is ongoing. 

"Nonetheless, as soon we were made aware of the situation we apologised on the spot and offered a full refund to the Neat family, which they accepted in the restaurant.

"We would like to reassure customers that our Valley Drive restaurant achieved a food hygiene rating of five out of five stars meaning that the business was found to have very good hygiene standards."