Christopher Tappin will be sentenced on 9th of January. In addition to the prison term of 33 months Tappin's plea deal includes a fine of $11,357.14 - the projected profit he stood to gain if his illegal activity had been brought to fruition.
He was originally thought to have faced up to 35 years in jail if found guilty.
His wife Elaine, 62, said ahead of today's hearing that "however upsetting" a plea deal was, it marked the beginning of his "swift and safe return" to the UK.
British businessman Christopher Tappin has pleaded guilty to selling surface-to-air missile parts to Iran, at a court hearing in the USA.
A retired British businessman who was extradited to the US in February to face arms dealing charges has been released on bail.