PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21949Sensor-Transducer

Ohio Semitronics Inc · NSN 5999-01-561-8154 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-561-8154 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-561-8154. Primary manufacturer part number: 21949.
Features
  • Sensor-Transducer — FSC 5999
  • 4 verified cross-references
  • Primary manufacturer: Ohio Semitronics Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Sensor-Transducer, cataloged under National Stock Number 5999-01-561-8154, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Ohio Semitronics Inc. This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-561-8154
Primary Part Number21949
Item NameSensor-Transducer
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerOhio Semitronics Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality Code00
Unit of IssueEA
SMR CodeCH
Weight6.2937 lbs
Cube2.2597 cu ft
Verified Substitutes 5
4510-00-035-4770 INTERCHANGEABLE
Cap,regulating Scre
4820-00-035-696921949 INTERCHANGEABLE
Disk,valve
Clayton Manufacturing Company
4730-00-223-64103B8487 INTERCHANGEABLE
Fitting,lubrication
Caterpillar Inc Div Caterpillar Defense
5961-00-235-8678 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-492-547021949 INTERCHANGEABLE
Semiconductor Device,diode
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
Cross-Reference Index
Part NumberManufacturer
21949 PRIMARY Ohio Semitronics Inc (USA)
CTL-1000HTY77,CTA115HY43 Ohio Semitronics Inc (USA)
766851-9,10 L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (USA)
766850-9,10 L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (USA)
Related Parts
4510-00-035-4770INTERCHANGEABLE
CAP,REGULATING SCRE
4820-00-035-6969INTERCHANGEABLE
DISK,VALVE
21949
4730-00-223-6410INTERCHANGEABLE
FITTING,LUBRICATION
3B8487
5961-00-235-8678INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-492-5470INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
21949

Frequently Asked Questions

What is NSN 5999-01-561-8154?

NSN 5999-01-561-8154 is a Sensor-Transducer, manufactured by Ohio Semitronics Inc, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-561-8154?

NSN 5999-01-561-8154 has 4 cross-referenced part numbers: 21949 (Ohio Semitronics Inc), CTL-1000HTY77,CTA115HY43 (Ohio Semitronics Inc), 766851-9,10 (L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.), 766850-9,10 (L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.).

What NSN replaces 5999-01-561-8154?

There are 5 known substitutes for 5999-01-561-8154: 4510-00-035-4770, 4820-00-035-6969, 4730-00-223-6410 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21949?

Key specifications for 21949: End Item Identification: SWITCHBOARD, BYPASS; End Item Identification: SWITCHBOARD, BYPASS. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com