Ms812021 Standard Pdf May 2026

The official repository for U.S. Department of Defense specifications is the ASSIST database. If you have a .mil or authorized .gov account, you can often download MS812021 free of charge. Without credentials, access may be limited, but some documents are publicly releasable.

This standard establishes the requirements for the material properties, dimensional tolerances, and performance testing of high-strength composite fastening systems used in secondary aerospace structures. Specifically, MS812021 addresses the issue of galvanic corrosion between carbon-fiber reinforced polymers (CFRP) and traditional titanium fasteners by introducing a new standardized coating protocol (Coating Class IV-A). The paper details the shear strength and fatigue life requirements necessary for certification under modern aviation regulatory frameworks. ms812021 standard pdf

Every compliant clamp must be marked with: The official repository for U

These marking requirements are critical for traceability—a major theme throughout the PDF. MS812021 does not exist in a vacuum

MS812021 does not exist in a vacuum. For full compliance, also obtain these PDFs: