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RA1554 — INDICATOR,ELECTRICAL TACHOMETER

✓ Government record, cited
ST-SEMICON INC · COMPONENT
PRODUCT OVERVIEW

RA1554: INDICATOR,ELECTRICAL TACHOMETER.

INDICATOR,ELECTRICAL TACHOMETER. Key specifications include CONTACT TYPE: PLUG-IN SOCKET, CURRENT TYPE: DC, POINTER TYPE: CLOCK-HAND SINGLE POINTER, FSC APPLICATION DATA: ENGINE INSTRUMENT, MOUNTING STUD LENGTH: 0.625 INCHES NOMINAL IN, MOUNTING FLANGE WIDTH: 4.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 6620-00-526-8996, 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
RA1554
NSN: 6620-00-526-8996
FSC: 6620 — Engine Instruments
CAGE: 51589 — ST-SEMICON INC (USA)
SPECIFICATIONS
CONTACT TYPEPLUG-IN SOCKET
CURRENT TYPEDC
POINTER TYPECLOCK-HAND SINGLE POINTER
CONTACT QUANTITY2
FSC APPLICATION DATAENGINE INSTRUMENT
MOUNTING STUD LENGTH0.625 INCHES NOMINAL IN
MOUNTING FLANGE WIDTH4.000 INCHES NOMINAL IN
MOUNTING STUD DIAMETER0.164 INCHES NOMINAL IN
ELECTRICAL CONNECTION QUANTITY2
MOUNTING FACILITY TYPE AND QUANTITY4 SEMIFLUSH
NSN6620-00-526-8996
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: ST-SEMICON INC INDICATOR,ELECTRICAL TACHOMETER TITLE COMPONENT PN RA1554 MFR ST-SEMICON INC INDICATOR,ELECTRICAL T
KEY FEATURES
•
MOUNTING FACILITY TYPE AND QUANTITY: 4 SEMIFLUSH
•
FSC APPLICATION DATA: ENGINE INSTRUMENT
•
CONTACT TYPE: PLUG-IN SOCKET
•
CURRENT TYPE: DC
•
ELECTRICAL CONNECTION QUANTITY: 2
•
MOUNTING STUD DIAMETER: 0.164 INCHES NOMINAL IN
•
CONTACT QUANTITY: 2
•
POINTER TYPE: CLOCK-HAND SINGLE POINTER
TECHNICAL CHARACTERISTICS
MOUNTING FACILITY TYPE AND QUANTITY4 SEMIFLUSH
FSC APPLICATION DATAENGINE INSTRUMENT
CONTACT TYPEPLUG-IN SOCKET
CURRENT TYPEDC
ELECTRICAL CONNECTION QUANTITY2
MOUNTING STUD DIAMETER0.164 INCHES NOMINAL IN
CONTACT QUANTITY2
POINTER TYPECLOCK-HAND SINGLE POINTER
MOUNTING FLANGE WIDTH4.000 INCHES NOMINAL IN
COLORWHITE POINTER OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
460079Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
3274638Reference document
Same NSN cross-reference
Reference document — Secondary reference
197093Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RA1554?
RA1554 is a INDICATOR,ELECTRICAL TACHOMETER manufactured by ST-SEMICON INC.
What parts can replace RA1554?
There are 3 known substitutes for RA1554: 460079, 3274638, 197093. Substitute compatibility should be verified for your specific system.
What is the NSN for RA1554?
RA1554 is cataloged in the U.S. Government catalog under NSN 6620-00-526-8996. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.