About Guill

Experienced Staff + Impressive Machining Capabilities = Superior Quality Results

Guill Tool & Engineering Co. Inc. is an established government supplier and technology leader in precision CNC machining.  Our wide range of capabilities can handle an extensive variety of manufacturing projects.  We can provide you with the defense components or nuclear components your company requires.  We have an extensive network of approved suppliers to ensure we are able to meet the rigorous standards of complex military specifications.

Since 1962, Guill Tool has been a preferred defense supplier of Level 1/SUBSAFE, Nuclear and non-level fittings, valves, flanges, components and assemblies for the Naval Submarine Industry.  We are currently expanding to provide these services for surface ship construction and life-cycle maintenance.  We have decades of experience in a wide array of manufacturing projects based on drawing specifications.

In addition, Guill Tool maintains a robust design team.We utilize the latest 3D CAD/MCAD in conjunction with Finite Element Analysis (FEA) and Computational Fluid Dynamics (CDF) Systems, allowing us to collaborate with customers in the design of new, efficient components for custom requirements and turn key projects.

Guill has carried ISO 9001 Standard Certification since 1995. Guill Tool also participates in the General Dynamics Corporation, Electric Boat Division and Northrop Grumman Shipbuilding, Newport News Supplier Delegated Inspection Programs.

Please browse our Products and Facilities pages to better understand our superior manufacturing capabilities and to view the many defense components and parts we have machined and assembled at our West Warwick, RI facility.