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Technical Data Sheet
PartsTable / MRO / 551LX
551LX ✓ 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 TELETYPEWRITER SUBASSEMBLY is a the manufacturer industrial component. Key specifications include overall_width: 0.031 INCHES NOMINAL IN, overall_length: 7.188 INCHES NOMINAL IN, component_type_and_quantity: 1 LEVER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5815-00-547-7890, 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→ 551LX
NSN: 5815-00-547-7890
FSC: 5815
CAGE: 27361 — BURKE PRODUCTS INC (USA)
SPECIFICATIONS
overall_width0.031 INCHES NOMINAL IN
overall_length7.188 INCHES NOMINAL IN
special_featuresMAJOR COMPONENTS: KEYTOP 1; MOUNTING CONFIGURATION: TWO UNTHREADED 0.064 INCH DIAMETER MOUNTING HOLES SPACED 0.375 INCH CENTER TO CENTER IN
component_type_and_quantity1 LEVER
NSN5815-00-547-7890
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TELETYPEWRITER SUBASSEMBLY TITLE COMPONENT PN 551LX MFR TELETYPEWRITER SUBASSE
KEY FEATURES
•
COMPONENT TYPE AND QUANTITY: 1 LEVER
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESMAJOR COMPONENTS: KEYTOP 1; MOUNTING CONFIGURATION: TWO UNTHREADED 0.064 INCH DIAMETER MOUNTING HOLES SPACED 0.375 INCH CENTER TO CENTER IN
COMPONENT TYPE AND QUANTITY1 LEVER
OVERALL WIDTH0.031 INCHES NOMINAL IN
OVERALL LENGTH7.188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
120 63/64Interchangeable
interchangeable cross-reference
interchangeable
49763Interchangeable
interchangeable cross-reference
interchangeable
2510 63/64Interchangeable
interchangeable cross-reference
interchangeable
11563Interchangeable
interchangeable cross-reference
interchangeable
C378APC2Interchangeable
interchangeable cross-reference
interchangeable
1720-809-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 551LX?
551LX is a TELETYPEWRITER SUBASSEMBLY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 551LX?
There are 17 known substitutes for 551LX: 120 63/64, 49763, 2510 63/64 and 14 more. Substitute compatibility should be verified for your specific system.
Is 551LX still available?
551LX is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026