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Technical Data Sheet
1204899 ✓ 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

ISOLATOR,RADIO FREQUENCY REFLECT. Key specifications include flange_type: COVER, overall_width: 1.875 INCHES MAXIMUM IN, overall_height: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN, overall_length: 1.875 INCHES MAXIMUM IN, fsc_application_data: RADAR EQUIPMENT, frequency_range_rating: +10.25 TO 10.55 GIGAHERTZ. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-01-135-2127, 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
1204899
NSN: 5985-01-135-2127
FSC: 5985
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
flange_typeCOVER
overall_width1.875 INCHES MAXIMUM IN
overall_height0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
overall_length1.875 INCHES MAXIMUM IN
flange_quantity1
fsc_application_dataRADAR EQUIPMENT
frequency_range_rating+10.25 TO 10.55 GIGAHERTZ
end_item_identificationAN/SPG-55B
identification_designatorTYPE UG-135/U
flange_connecting_hole_spacingSPACED ON 1.220 IN. BY 1.280 IN. MTG CTRS IN
flange_connecting_hole_diameter0.167 INCHES MINIMUM IN
flange_connection_facility_quantity4
NSN5985-01-135-2127
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ISOLATOR,RADIO FREQUENCY REFLECT TITLE COMPONENT PN 1204899 MFR ISOLATOR,RADIO FREQUEN
KEY FEATURES
IDENTIFICATION DESIGNATOR: TYPE UG-135/U
FLANGE CONNECTING HOLE DIAMETER: 0.167 INCHES MINIMUM IN
FSC APPLICATION DATA: RADAR EQUIPMENT
FLANGE CONNECTION FACILITY QUANTITY: 4
FLANGE CONNECTING HOLE SPACING: SPACED ON 1.220 IN. BY 1.280 IN. MTG CTRS IN
FREQUENCY RANGE RATING: +10.25 TO 10.55 GIGAHERTZ
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH1.875 INCHES MAXIMUM IN
IDENTIFICATION DESIGNATORTYPE UG-135/U
FLANGE CONNECTING HOLE DIAMETER0.167 INCHES MINIMUM IN
FSC APPLICATION DATARADAR EQUIPMENT
FLANGE CONNECTION FACILITY QUANTITY4
FLANGE CONNECTING HOLE SPACINGSPACED ON 1.220 IN. BY 1.280 IN. MTG CTRS IN
END ITEM IDENTIFICATIONAN/SPG-55B
FREQUENCY RANGE RATING+10.25 TO 10.55 GIGAHERTZ
OVERALL HEIGHT0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
OVERALL WIDTH1.875 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
42098Interchangeable
interchangeable cross-reference
interchangeable
7-42098Interchangeable
interchangeable cross-reference
interchangeable
SKA1621Interchangeable
interchangeable cross-reference
interchangeable
646Interchangeable
interchangeable cross-reference
interchangeable
AA1-228Interchangeable
interchangeable cross-reference
interchangeable
AF-823Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1204899?
1204899 is a ISOLATOR,RADIO FREQUENCY REFLECT.
What parts can replace 1204899?
There are 10 known substitutes for 1204899: 42098, 7-42098, SKA1621 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1204899?
1204899 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-01-135-2127. This indicates validated use in U.S. government and defense supply chains.
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