We are beginning to stock hard to find hardware and fasteners that are typically found on Beechcraft. ALL hardware we sell is brand new and fully traceable back to the original fastener manufacturer. All bolts that have blue head markings have been Magnetically Particle Inspected per ASTM E1444/E1444M-16. These bolts have been 100% inspected. South Seas Ventures maintains evidence of the aforementioned on file at SSV, Inc. Copies of these certifications are available for a nominal charge when placing an order.