Aircraft Tubing: Michigan Seamless Tube manufactures 4130 aircraft tubing to meet the needs of the aircraft and aerospace industry. MSTube 4130 is quad certified to the following general specifications: A519, MIL-T-6736BN (AMS-T-6736), AMS-6371 and AMS-6360 with decarburization levels to AMS-6371. Our Tubing meets DFARS requirements and is manufactured from 100% US material with complete traceability. Please specify at time of inquiry and order. © Michigan Seamless Tube 2006