While addressing a gathering on the 18th anniversary of Pakistan's first nuclear tests, Khan said that Pakistan is capable enough to target Delhi from Kahuta near Rawalpindi in five minutes.
Pakistan carried the first nuclear tests under his supervision in 1998.
He said, Pakistan could have become a nuclear power as early as 1984 but the then President General Zia ul Haq "opposed the move".
"We were able and we had a plan to launch nuclear test in 1984. But President General Zia ul Haq had opposed the move," said Khan.
He said General Zia, who ruled Pakistan from 1979 to 1988, opposed the nuclear testing as he believed that the world would intervene militarily.
He regretted the treatment and said Pakistan would never have achieved the feat of becoming first Muslim nuclear country without his "services".
"We are facing the worst against our services to the country's nuclear program," he said referring to the humiliation he suffered.
(With inputs from PTI)