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Technical Data Sheet
990-4S ✓ 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

SOCKET,PLUG-IN ELECTRONIC COMPON. Key specifications include material: STEEL OVERALL, flow_angle: 90.0 DEGREES, leg_length: 1.045 INCHES MINIMUM AND 1.115 INCHES MAXIMUM FIRST END IN, seat_angle: 12.0 DEGREES FIRST END, thread_class: 3B FIRST END, connection_type: THREADED EXTERNAL HOSE GRIPPING SECOND END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5935-00-508-1876, 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
990-4S
NSN: 5935-00-508-1876
FSC: 5935
CAGE: 06980 — COMMUNICATIONS & POWER INDUSTRIES LLC DBA CPI DIV MICROWAVE POWER PRODUCTS DIVISION - EIMAC OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flow_angle90.0 DEGREES
leg_length1.045 INCHES MINIMUM AND 1.115 INCHES MAXIMUM FIRST END IN
seat_angle12.0 DEGREES FIRST END
thread_class3B FIRST END
connection_typeTHREADED EXTERNAL HOSE GRIPPING SECOND END
mounting_methodRETAINER RING
connection_styleSWIVEL NUT, FLARELESS (SWIVEL NUT ATTACHMENT METHOD OPTIONAL) (TUBE) FIRST END
features_providedCENTER SHIELD
polarization_typeCENTER KEY HOLE
precious_materialSILVER
surface_treatmentCADMIUM INSIDE
NSN5935-00-508-1876
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SOCKET,PLUG-IN ELECTRONIC COMPON TITLE COMPONENT PN 990-4S MFR SOCKET,PLUG-IN ELECTRO
KEY FEATURES
POLARIZATION TYPE: CENTER KEY HOLE
PRECIOUS MATERIAL AND LOCATION: CONTACT SURFACES SILVER
FABRICATION METHOD: MOLDED
SURFACE TREATMENT: SILVER CONTACT
MATERIAL: COPPER ALLOY CONTACT
PRECIOUS MATERIAL: SILVER
PRECIOUS MATERIAL AND WEIGHT: 0.007 SILVER GRAINS, TROY
TECHNICAL CHARACTERISTICS (FLIS)
POLARIZATION TYPECENTER KEY HOLE
PRECIOUS MATERIAL AND LOCATIONCONTACT SURFACES SILVER
FABRICATION METHODMOLDED
SURFACE TREATMENTSILVER CONTACT
MATERIALCOPPER ALLOY CONTACT
PRECIOUS MATERIALSILVER
MATERIALPLASTIC BODY
PRECIOUS MATERIAL AND WEIGHT0.007 SILVER GRAINS, TROY
TERMINAL TYPE AND QUANTITY7 TAB, SOLDER LUG
FEATURES PROVIDEDCENTER SHIELD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
L1122AInterchangeable
interchangeable cross-reference
interchangeable
L1122A-Y101Interchangeable
interchangeable cross-reference
interchangeable
Y101Interchangeable
interchangeable cross-reference
interchangeable
136-2090-4Interchangeable
interchangeable cross-reference
interchangeable
MS87023-4Interchangeable
interchangeable cross-reference
interchangeable
124-109-51Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 990-4S?
990-4S is a SOCKET,PLUG-IN ELECTRONIC COMPON.
What parts can replace 990-4S?
There are 7 known substitutes for 990-4S: L1122A, L1122A-Y101, Y101 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 990-4S?
990-4S is cataloged in the Federal Logistics Information System (FLIS) under NSN 5935-00-508-1876. This indicates validated use in U.S. government and defense supply chains.
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