Inspired by a real coal mine disaster known as Chasnala Mining Disaster happened on 27th December 1975 near Dhanbad, Jharkhand that killed 372 miners.
When the movie opened in Leicester's Natraj cinema, England,UK in 1979, Amitabh Bachchan & Shashi Kapoor both appeared on stage during the opening credits of the movie to surprise the movie audience. They were in the UK to promote the movie.
During the Kaala Patthar shooting, Shatrughan Sinha says Amitabh Bachchan kept a distance from him even though they were "great buddies" during their initial years in Bollywood.
Shatrughan Sinha's dialog Teesre Baadshah Hum Hai became very famous.