About Guill

Guill Tool & Engineering Co. Inc. is the recognized Technology Leader in the Machining and Manufacturing of Defense Components. We have an extensive network of approved suppliers for turn-key assemblies and manufacturing projects.

Guill Tool & Engineering is a supplier of Subsafe/Level 1, Nuclear Level and Non-level fittings, valves, components and assemblies for the Naval Submarine Industry since 1962.

Guill Tool is a preferred supplier for Level 1 fittings to Electric Boat Corp., Northrop Grumman Newport News Corp. and participates in their Supplier Delegated Inspection Program.