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PartsTable / COMPONENT / K5991
K5991 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include body_width: 1.812 INCHES MAXIMUM IN, body_height: 2.437 INCHES MAXIMUM IN, body_length: 1.937 INCHES MAXIMUM IN, inclosure_type: HERMETICALLY SEALED, overall_height: 2.875 INCHES MAXIMUM IN, mounting_method: THREADED STUD(S) SINGLE GROUP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-645-4737, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
K5991
NSN: 5950-00-645-4737
FSC: 5950
CAGE: 51181 — KEYTRONICS, INC. DIV API TECHNOLOGIES CORP- MAGNETICS (USA)
SPECIFICATIONS
body_width1.812 INCHES MAXIMUM IN
body_height2.437 INCHES MAXIMUM IN
body_length1.937 INCHES MAXIMUM IN
inclosure_typeHERMETICALLY SEALED
overall_height2.875 INCHES MAXIMUM IN
mounting_methodTHREADED STUD(S) SINGLE GROUP
frequency_rating250.0 HERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
nominal_thread_size0.138 INCHES SINGLE GROUP IN
transformer_functionOUTPUT
reliability_indicatorNOT ESTABLISHED
impedance_rating_in_ohms100000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
thread_quantity_per_inch32 SINGLE GROUP
NSN5950-00-645-4737
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,AUDIO FREQUENCY TITLE COMPONENT PN K5991 MFR TRANSFORMER,AUDIO FREQ
KEY FEATURES
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH: 1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
•
RELIABILITY INDICATOR: NOT ESTABLISHED
•
IMPEDANCE RATING IN OHMS: 100000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
•
INCLOSURE TYPE: HERMETICALLY SEALED
•
MOUNTING FACILITY QUANTITY: 4 SINGLE GROUP
•
FREQUENCY RATING: 250.0 HERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
•
TRANSFORMER FUNCTION: OUTPUT
TECHNICAL CHARACTERISTICS (FLIS)
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
RELIABILITY INDICATORNOT ESTABLISHED
IMPEDANCE RATING IN OHMS100000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
INCLOSURE TYPEHERMETICALLY SEALED
MOUNTING FACILITY QUANTITY4 SINGLE GROUP
OVERALL HEIGHT2.875 INCHES MAXIMUM IN
FREQUENCY RATING250.0 HERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
TRANSFORMER FUNCTIONOUTPUT
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
MOUNTING METHODTHREADED STUD(S) SINGLE GROUP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
1315-440-0005Interchangeable
Cartridge,90 Millimeter
interchangeable
437-09Interchangeable
Cartridge,90 Millimeter
interchangeable
75-1-207-4Interchangeable
Cartridge,90 Millimeter
interchangeable
500-718Interchangeable
interchangeable cross-reference
interchangeable
EOTZ-5560-MInterchangeable
interchangeable cross-reference
interchangeable
B107.5M CL1STAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K5991?
K5991 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace K5991?
There are 9 known substitutes for K5991: 1315-440-0005, 437-09, 75-1-207-4 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K5991?
K5991 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-645-4737. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026