The Synchro,differential Transmitter, cataloged under National Stock Number 5990-00-179-1871, is classified within Federal Supply Class 5990 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Sae International Dba Sae International. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-179-1871 |
| Primary Part Number | M20708/81-01B |
| Item Name | Synchro,differential Transmitter |
| FSC / FSG | 5990 / 59 — No Item Name Available |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Flange Thickness | 0.0930 INCHES NOMINAL IN |
| Undercut Diameter | 0.9750 INCHES NOMINAL IN |
| Shoulder Diameter | 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Flange Diameter | 1.0570 INCHES MINIMUM AND 1.0620 INCHES MAXIMUM IN |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Body Style | STANDARD ROUND C |
| Pilot Diameter | 0.6245 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN |
| Spline Tooth Quantity | 21 SINGLE SHAFT |
| Shaft Nominal Thread Size | 0.190 INCHES SINGLE SHAFT IN |
| Maximum Temp Rise | 20.0 CELSIUS DEGC |
| Stator Input Current Rating | 49.0 MILLIAMPERES MAXIMUM |
| Actuator Friction Torque at Plus 25 Deg Celsius | 0.07 INCH-OUNCES MAXIMUM IN |
| Shaft Thread Class | 2A SINGLE SHAFT A |
| Spline Tooth Diametral Pitch | 120 SINGLE SHAFT |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 60.00 OUTPUT |
| Frequency in Hertz | 400.0 NOMINAL |
| Zrs Impedance Angle in Deg | 23.00 MINIMUM AND 33.00 MAXIMUM |
| Shaft Type | SPLINE W/THREADS SINGLE SHAFT |
| Zso Impedance Angle in Deg | 79.00 MINIMUM AND 85.00 MAXIMUM |
| Specification/standard Data | 81349-MIL-S-20708/81 GOVERNMENT SPECIFICATION |
| Zso Impedance Magnitude in Ohms | 1590.00 MINIMUM AND 2050.00 MAXIMUM |
| Length | 0.0620 INCHES NOMINAL SHOULDER IN |
| Stator Input Electrical Power Rating | 530.0 MILLIWATTS NOMINAL |
| Phase Shift Angle in Deg | 4.000 INPUT TO OUTPUT NOMINAL |
| Alignment Hole Quantity | 4 |
| Mounting Surface to Terminal End Distance | 1.8510 INCHES NOMINAL IN |
| Body Material | STEEL CORROSION RESISTING |
| Fragility Factor | MODERATELY RUGGED |
| Terminal Type and Quantity | 6 SCREW |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 11CDX4B | Moog Inc. (USA) |
| M20708/81-001 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 11CDX4B | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| MILS20708-81 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 11CDX4A | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| M20708/81-01B PRIMARY | Sae International Dba Sae International (USA) |
| M20708/81-01B | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| AS20708/81 | Sae Customer Service Dept 2045 (USA) |
| 3522 500 05266 | Thales Nederland (NLD) |
| SAE-AS20708/81 | Sae International Dba Sae International (USA) |
NSN 5990-00-179-1871 is a Synchro,differential Transmitter, manufactured by Sae International Dba Sae International, classified under FSC 5990 (No Item Name Available). Status: active.
NSN 5990-00-179-1871 has 10 cross-referenced part numbers: 11CDX4B (Moog Inc.), M20708/81-001 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 11CDX4B (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILS20708-81 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 11CDX4A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 5 more.
There are 4 known substitutes for 5990-00-179-1871: 5990-00-438-3236, 5990-00-603-9313, 5990-00-722-7327 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for M20708/81-01B: Flange Thickness: 0.0930 INCHES NOMINAL IN; Overall Length: 2.4060 INCHES NOMINAL IN; Undercut Diameter: 0.9750 INCHES NOMINAL IN; Shoulder Diameter: 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN. 30 total characteristics are documented in the Federal Logistics Information System.