All our stands are manufactured and approved to ASME standards, ISO 9001, GE Spec M50TF1338-S3 or Update, CFMI, Pratt and IAE, and Milspec. Stands are in accordance with M50TF3584-S2 Standard. IAE Stands conform to AE6r19814. All JT8D Stands meet PPS 171B (July 1981).