Receiver-transmitter Synchro

NSN: 5990-00-441-7974 | Model: M20708/23-01A

A synchro having a dual purpose. It may be used in applications requiring either a receiver or transmitter. For synchros having a single purpose, see synchro, receiver and synchro, transmitter.

NSN Properties and Flags

NATO Stock Number

5990-00-441-7974

DEMIL

Yes - ITAR Controlled (Code D)

Body Material

Steel, corrosion resisting

Body Style

Standard round c

Shoulder Diameter

Between 1.3115 inches and 1.3120 inches

Pilot Diameter

Between 0.8745 inches and 0.8750 inches

Overall Length

2.3270 inches

Flange Diameter

Between 1.4340 inches and 1.4370 inches

Flange Thickness

0.0930 inches

Undercut Diameter

1.3120 inches

Undercut Width

0.0780 inches

Shaft Diameter

0.1867 inches single shaft and 0.1872 inches single shaft

Shaft Length

0.5550 inches single shaft

Fragility Factor

Moderately rugged

Maximum Tempurature Rise

35.0 degrees celsius

Body Size

Rotor Input Voltage Rating In Volts

115.0

Frequency In Hertz

60.0

Rotor Input Current Rating

80.0 milliamperes

Rotor Input Electrical Power Rating

2.8 watts

Zss Impedance Magnitude In Ohms

920.00

Zss Impedance Angle In Deg

Between 10.00 and 18.00

Phase Shift Angle In Deg

20.000 input to output

Maximum Fundamental Null Voltage In Millivolts Per Volt

50.00 output

Maximum Total Null Voltage Output In Millivolts Per Volt

500.00

Electrical Error Angular Range In Minutes

-6.0/+6.0

Spline Tooth Quantity

21 single shaft

Receiver Error Angular Range In Minutes

-45.0/+45.0

Torque Gradient Per Angular Deg

0.030 inch-ounces

Alignment Hole Quantity

Pilot Length

0.0400 inches

Shoulder Length

0.1320 inches

Mounting Surface To Terminal End Distance

1.7720 inches

Spline Tooth Diametral Pitch

120 single shaft

Shaft Thread Series Designator

Unf single shaft

Shaft Thread Direction

Right-hand single shaft

Shaft Thread Class

2a single shaft

Terminal Location

Rear

Shaft Thread Length

0.2000 inches single shaft

Shaft Type

Spline w/threads single shaft

Alignment Hole Depth

0.1250 inches

Transformation Ratio

0.783 stator to rotor

Alignment Hole Bolt Circle Diameter

1.1000 inches

Shaft Thread Size

0.190 inches single shaft

Test Data Document

81349-mil-s-20708 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).

Terminal Type And Quantity

5 screw

Specification Data

81349-mil-s-20708/23 government specification

Recent Solicitations

Solicitation	Return by Date	Buyer Code	Quantity
SPE7M518T795G	2018-07-30	PMCM4	6 EA

Inventory Check

The last inventory check on this NSN was done on 04/22/2024. Due to rapid changes in inventory this may not be the current stock qty.

New Surplus: 2
New: 1
Overhauled: 1
As Removed: 1

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

NSN 5990-00-441-7974 Datasheet

Supply Class (FSC):

Synchros And Resolvers

Cross Reference:

M20708/23-01A
MIL-S-20708/23
15TRX6A
M20708/23-001

Cage Codes:

Military Specifications (CAGE 81349)

Schedule B & Trade:

Schedule B: 9014900000 (NAICS 334511)

Parts & accessories for direction finding compasses and other navigational instruments and appliances
SITC: 87412

Parts and accessories of navigational instruments and appliances
End Use: 22220

Marine engines, parts

Identification:

HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

A - Item does not contain precious metal.

ADPE

- Represents items with no adp components

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:

NMFC:

062120 - Generators/motors/parts noi
WCC:

593 - Motors and parts, (machinery and parts),(less than 35 feet)
SHC:

9 - Other or no special handling required (sh)
ADC:

A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
ACC:

V - Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing
LTL:

W - Rating variable
TCC:

Z - No special type of cargo code applicable

NSN Management Codes:

SOS
Sms
AAC
Z
Quantity per pack
1
Unit of Measure
Ea
Shelf Life
N/A
Classification Control
7
MGMT_CTL
Sf9eh-v
Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $4,228.65 to $7,047.74..
Does NSN 5990-00-441-7974 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Air Force, Department Of The Navy, U.s. Coast Guard, Poland, Bulgaria, Brazil, Spain, Malaysia, Australia, Canada, Republic Of Korea, Netherlands, Italy, Greece, and Turkey
What is the NIIN of NSN 5990-00-441-7974?
004417974 or 00-441-7974
Does NSN 5990-00-441-7974 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5990-00-441-7974?
Solicitation SPE7M518T795G for qty 6 on 07/20/2018
When was this national stock number assigned to the federal catalog?
Dec 10, 1969