| C-Spec 4000 Series Retainers - CAD Plated, Phillips Head. (Camloc® compatible)  100% Domestic USA Manufacturing, DFARs / RoHS Compliant Materials and Finishes. Fastening Systems Approved for Aircraft by US DOT, FAA in accordance with TSO-C148 Provisions. Conformance to all NASM5591 Parameters for Cycle Life, Strength, Corrosion Resistance etc. STC Approvals for Several Aircraft Manufacturers, Including Cessna and BeechCraft. Quality Assurance In Accordance With 14 CFR Part 21 Requirements, Verified by US DOT, FAA. All Mechanical Testing Conforms to ASTM Standards.  |