The Synchro,differential Transmitter, cataloged under National Stock Number 5990-01-085-3765, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Avionics Specialties, Inc.. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-01-085-3765 |
| Primary Part Number | 123-775 |
| Item Name | Synchro,differential Transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Avionics Specialties, Inc. |
| Status | ACTIVE |
| Body Size | 25 |
| Body Diameter | 2.5000 INCHES MINIMUM AND 2.5200 INCHES MAXIMUM IN |
| Flange Diameter | 2.6250 INCHES MINIMUM AND 2.6450 INCHES MAXIMUM IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | PICK-OFF B |
| Alignment Hole Bolt Circle Diameter | 0.5560 INCHES MINIMUM AND 0.5680 INCHES MAXIMUM IN |
| Mounting Facility Screw Thread Series Designator | UNF |
| Frequency in Hertz | 600.0 NOMINAL |
| Stator Input Electrical Power Rating | 500.0 MILLIWATTS MAXIMUM |
| Terminal Location | REAR |
| Body Thru-Hole Diameter | 0.3125 INCHES MINIMUM AND 0.3130 INCHES MAXIMUM IN |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 35.00 OUTPUT |
| Stator Input Voltage Rating in Volts | 26.0 NOMINAL |
| Mounting Facility Nominal Screw Thread Diameter | 0.125 INCHES IN |
| Securing Hole Quantity | 4 |
| Terminal Type and Quantity | 16 WIRE LEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 123-775 | Avionics Specialties, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 123-664 | 5/9 Secondary reference Avionics Specialties, Inc. |
| 123-775 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5990-01-085-3765 is a Synchro,differential Transmitter, manufactured by Avionics Specialties, Inc., classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-01-085-3765 has 1 manufacturer part number on file: 123-775 (Avionics Specialties, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-695-9112. Verify interchangeability with system specifications before substitution.
Key specifications for 123-775: Body Size: 25; Body Diameter: 2.5000 INCHES MINIMUM AND 2.5200 INCHES MAXIMUM IN; Flange Diameter: 2.6250 INCHES MINIMUM AND 2.6450 INCHES MAXIMUM IN; Fragility Factor: MODERATELY RUGGED. 16 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5990-01-085-3765 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.