PartsTable
Technical Data Sheet
551-231 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
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 MODEM,COMMUNICATIONS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, body_style: PLAIN, SOLID, bore_style: PLAIN BOTH ENDS, tooth_form: STANDARD, pitch_diameter: 2.4062 INCHES NOMINAL IN, pressure_angle: 20.0000 DEGREES. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5920-00-636-4555, 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
MRO MRO_GENERAL 551-231
NSN: 5920-00-636-4555
FSC: 5920
CAGE: 94833 — KECO INDUSTRIES, INC. (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
body_stylePLAIN, SOLID
bore_stylePLAIN BOTH ENDS
tooth_formSTANDARD
pitch_diameter2.4062 INCHES NOMINAL IN
pressure_angle20.0000 DEGREES
teeth_quantity231
style_designatorHUBLESS
face_nominal_width0.125 INCHES IN
bore_nominal_diameter1.880 INCHES BOTH ENDS IN
nominal_outside_diameter2.427 INCHES IN
material_document_and_classificationQQ-A-250/4,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5920-00-636-4555
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MODEM,COMMUNICATIONS TITLE COMPONENT PN 551-231 MFR MODEM,COMMUNICATIONS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
38331Interchangeable
interchangeable cross-reference
interchangeable
1B3927Interchangeable
interchangeable cross-reference
interchangeable
132-0-052Interchangeable
interchangeable cross-reference
interchangeable
B238Interchangeable
interchangeable cross-reference
interchangeable
M31Interchangeable
interchangeable cross-reference
interchangeable
7036150Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 551-231?
551-231 is a MODEM,COMMUNICATIONS. It is classified as a MRO (MRO_GENERAL).
What parts can replace 551-231?
There are 23 known substitutes for 551-231: 38331, 1B3927, 132-0-052 and 20 more. Substitute compatibility should be verified for your specific system.
Is 551-231 still available?
551-231 is currently cancelled.
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