Northrop Grumman is an Aerospace and Defense company famous for the B-2 Spirit Bomber, and more recently its unmanned aircraft RQ-4.
Like other Major Tier 1 Aerospace companies, Northrop Grumman has special quality approvals for the procurement of Titanium. ACS-MRS-1205 is a quality specification for 6Al-4V for Titanium Plate in the Annealed condition.
Fighter Jet Metals works with Titanium Plate from .187″THK and exceeds 5″THK Titanium Plate.