Lee Specialities Ltd. pleaded guilty in a Calgary court to contravening the Special Economic Measures Act in efforts to ship rubber parts that could have had nuclear applications.

It’s the first time investigators have laid charges under the act.

In 2011, Lee Specialties received a purchase order from Kan Dana Middle East LLC, which had affiliates in Dubai and Iran.

The order, which was initially worth $6,054.50, was for oilfield equipment, including 50 Viton O-rings, valued at 30¢ each.

Export of the rings from Canada to Iran has been banned since 2010.