4m Sigma Corporation
4M Sigma Corporation is an aerospace manufacturing company located in Seattle, Washington that designs, manufactures, and maintains flightline, hangar, and backshop test equipment; operational support equipment; airframe cable assemblies; and safety training equipment for commercial aviation and defense and homeland security industries. The company produces shorting adapters designed for fuel system applications.
Summarized from the company’s own website
At a glance
EmployeesNot reported
In business sinceNot reported
HeadquartersSeattle, WA
SAM.gov UEIT955WM3QK355
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| 4m Sigma Corporation | Seattle | WA | — | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.

