State Industrial Supply Corp. Is an ISO 9001 registered company. SIS headquarters in Tucson, Arizona houses a state of the art inspection lab. SIS features a full line of certified Ring Gauges, Plug Ganges, an optical comparator, and a newly added Video Measurement system.

Other services are:

- Level 1 through 3 PPAP processing
- Full lot traceability
- IMDS reporting
- Full RoHS certifications
- Hardness testing
- Micrometers, Calipers
- First article submission
- Vendor Audit program
- Quality manual
- 100 % sorting available