Material Document and Classification: QQ-A-225/8, ALLOY 6061, T6 FED SPEC SINGLE MATERIAL RESPONSE
Material: ALUMINUM ALLOY 6061
Usage Design: ADAPTS 1.975 INCH DIAMETER SYNCHRO TO 2.940 INCH DIAMETER SPACE IN
Identification
NSN: 5990-01-331-9438
NIIN: 013319438
FSC: 5990 — Synchros and Resolvers
FSG: 59 — Electrical and Electronic Equipment Components
General Description
The Adapter,synchro, cataloged under National Stock Number 5990-01-331-9438, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5990-01-331-9438
Item Name
Adapter,synchro
FSC / FSG
5990 / 59 — Synchros and Resolvers
Status
ACTIVE
Overall Diameter
2.940 INCHES NOMINAL IN
Material Document and Classification
QQ-A-225/8, ALLOY 6061, T6 FED SPEC SINGLE MATERIAL RESPONSE
Material
ALUMINUM ALLOY 6061
Usage Design
ADAPTS 1.975 INCH DIAMETER SYNCHRO TO 2.940 INCH DIAMETER SPACE IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
T800109
3/9Design control — primary reference
Qualimetrics Inc
No interchangeability data on file.
Other items in FSC 5990 — Synchros and Resolvers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5990-00-001-1764
SYNCHRO,DIFFERENTIAL TRANSMITTER
5990-00-001-1765
SYNCHRO,TRANSMITTER
5990-00-001-1766
SYNCHRO,CONTROL TRANSFORMER
5990-00-001-4570
5990-00-001-4570 · Item name not on file
5990-00-001-5956
5990-00-001-5956 · Item name not on file
5990-00-001-7588
SYNCHRO,TRANSMITTER
5990-00-003-0177
5990-00-003-0177 · Item name not on file
5990-00-003-0569
RESOLVER,ELECTRICAL
Frequently Asked Questions
What is NSN 5990-01-331-9438?
NSN 5990-01-331-9438 is a Adapter,synchro, classified under FSC 5990, Synchros and Resolvers. Status: active.
What are the specifications of 5990-01-331-9438?
Key specifications for 5990-01-331-9438: Overall Diameter: 2.940 INCHES NOMINAL IN; Material Document and Classification: QQ-A-225/8, ALLOY 6061, T6 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 1.210 INCHES NOMINAL IN; Material: ALUMINUM ALLOY 6061. 4 specifications are documented in the U.S. Government catalog.
Is NSN 5990-01-331-9438 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.