PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42520Gyroscope,displacement

Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems · NSN 6615-00-903-4414 · FSC 6615 · No Item Name Available
Verified by PartsTable
NSN 6615-00-903-4414 — this item is cataloged by the U.S. Government under National Stock Number 6615-00-903-4414. Primary manufacturer part number: 42520.
Features
  • Gyroscope,displacement — FSC 6615
  • Instrument Type: UNFLOATED
  • Nondefinitive Spec/std Data: MD-1 TYPE
  • Design Type: NONCAGEABLE
  • Sensing Output/signal Level Method: SYNCHRO 115V AC,400 CYCLE;ONE PHASE INPUT,11.8V OUTPUT V
  • Torqued Gimbal Quantity: 2
  • Relationship to Similar Equipment: SBU-23A/A GYROSCOPE CAN BE USED WITH MD-1 MOUNTING PLATE AS A REPLACEMENT ASSEMBLY FOR THIS NSN A
  • Wheel Power Method: ELECTRIC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Gyroscope,displacement, cataloged under National Stock Number 6615-00-903-4414, is classified within Federal Supply Class 6615 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6615-00-903-4414
Primary Part Number42520
Item NameGyroscope,displacement
FSC / FSG6615 / 66 — No Item Name Available
ManufacturerUndersea Sensor Systems Inc Div Ultra Sonobuoy Systems
StatusACTIVE
Instrument TypeUNFLOATED
Nondefinitive Spec/std DataMD-1 TYPE
Design TypeNONCAGEABLE
Sensing Output/signal Level MethodSYNCHRO 115V AC,400 CYCLE;ONE PHASE INPUT,11.8V OUTPUT V
Torqued Gimbal Quantity2
Relationship to Similar EquipmentSBU-23A/A GYROSCOPE CAN BE USED WITH MD-1 MOUNTING PLATE AS A REPLACEMENT ASSEMBLY FOR THIS NSN A
Wheel Power MethodELECTRIC
Gimbal Torque Application MethodTORQUE MOTOR
Gimbal Quantity2
Axis Displacement Limitation in DegROLL AXIS DISPLACEMENT UNLIMITED;PITCH AXIS DISPLACEMENT PORM 82 DEG
Voltage in Volts115.0
Unit TypeVERTICAL
PhaseTHREE
Frequency in Hertz400.0
Shock MountNOT PROVIDED
Freedom Axis Quantity2
Current TypeAC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6615-00-060-531441638 INTERCHANGEABLE
Gyroscope,displacement
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
6615-00-074-4036121672-01-16 INTERCHANGEABLE
Gyroscope,displacement
Ge Aviation Systems Llc
5950-00-101-24113018736"REV.B" INTERCHANGEABLE
Transformer,power
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6615-00-169-146144524 INTERCHANGEABLE
Gyroscope,displacement
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
6615-00-179-263643550 INTERCHANGEABLE
Gyroscope,displacement
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
6615-00-181-271843550-1 INTERCHANGEABLE
Gyroscope,displacement
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
6615-00-181-271943550-2 INTERCHANGEABLE
Gyroscope,displacement
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
6615-00-550-6628121672-01 INTERCHANGEABLE
Gyroscope,displacement
Ge Aviation Systems Llc
6615-00-618-980414125-1A INTERCHANGEABLE
Gyroscope,displacement
Mission Systems Davenport Inc.
6615-00-900-5959121672-01-17 INTERCHANGEABLE
Gyroscope,displacement
Ge Aviation Systems Llc
Cross-Reference Index
Part NumberManufacturer
42520 PRIMARY Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (USA)
MD1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-G-25597 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6615-00-060-5314INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
41638
6615-00-074-4036INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
121672-01-16
5950-00-101-2411INTERCHANGEABLE
TRANSFORMER,POWER
3018736"REV.B"
6615-00-169-1461INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
44524
6615-00-179-2636INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
43550
6615-00-181-2718INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
43550-1
6615-00-181-2719INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
43550-2
6615-00-550-6628INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
121672-01
6615-00-618-9804INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
14125-1A
6615-00-900-5959INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
121672-01-17
6615-00-900-6853INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
42281
6615-00-933-6037INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
124623-01-14

Frequently Asked Questions

What is NSN 6615-00-903-4414?

NSN 6615-00-903-4414 is a Gyroscope,displacement, manufactured by Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems, classified under FSC 6615 (No Item Name Available). Status: active.

What are the part numbers for NSN 6615-00-903-4414?

NSN 6615-00-903-4414 has 3 cross-referenced part numbers: 42520 (Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems), MD1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-G-25597 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6615-00-903-4414?

There are 12 known substitutes for 6615-00-903-4414: 6615-00-060-5314, 6615-00-074-4036, 5950-00-101-2411 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 42520?

Key specifications for 42520: Instrument Type: UNFLOATED; Nondefinitive Spec/std Data: MD-1 TYPE; Design Type: NONCAGEABLE; Sensing Output/signal Level Method: SYNCHRO 115V AC,400 CYCLE;ONE PHASE INPUT,11.8V OUTPUT V. 21 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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