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551TZ — TACHOMETER,MECHANICAL,FIXED MOUN

✓ Government record, cited
STEWART-WARNER CORPORATION · COMPONENT
PRODUCT OVERVIEW

551TZ: TACHOMETER,MECHANICAL,FIXED MOUN.

TACHOMETER,MECHANICAL,FIXED MOUN. Key specifications include MATERIAL: STEEL CASE, UNIT TYPE: MAGNETIC, CASE SHAPE: ROUND, MOUNTING TYPE: PANEL, OVERALL DEPTH: 3.440 INCHES NOMINAL IN, POINTER COLOR: WHITE. This part is cataloged in the U.S.

Government catalog under NSN 6680-00-403-5922, 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
551TZ
NSN: 6680-00-403-5922
FSC: 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
CAGE: 57733 — STEWART-WARNER CORPORATION (USA)
SPECIFICATIONS
MATERIALSTEEL CASE
UNIT TYPEMAGNETIC
CASE SHAPEROUND
DIAL QUANTITY1
MOUNTING TYPEPANEL
OVERALL DEPTH3.440 INCHES NOMINAL IN
POINTER COLORWHITE
SCALE QUANTITY1
GRADUATION UNIT50000.0 REVOLUTIONS PER MINUTE AND 1.0 HOURS OPERATED
OPERATING RANGE+0.0 TO 2500.0 REVOLUTIONS PER MINUTE
OVERALL DIAMETER3.770 INCHES NOMINAL IN
POINTER QUANTITY1
NSN6680-00-403-5922
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: STEWART-WARNER CORPORATION TACHOMETER,MECHANICAL,FIXED MOUN TITLE COMPONENT PN 551TZ MFR STEWART-WARNER CORPORATION TACHOMETER,MECHANICAL,
KEY FEATURES
•
SCALE QUANTITY: 1
•
MAJOR GRADUATION COLOR: WHITE
•
OVERALL DIAMETER: 3.770 INCHES NOMINAL IN
•
DIAL ILLUMINATION: NOT PROVIDED
•
DRIVE CONNECTION TYPE: FLEXIBLE
•
SCALE SMALLEST INCREMENT: 50.0 REVOLUTIONS PER MINUTE
•
SHAFT ROTATION DIRECTION: COUNTERCLOCKWISE
•
DIAL QUANTITY: 1
TECHNICAL CHARACTERISTICS
SCALE QUANTITY1
MAJOR GRADUATION COLORWHITE
OVERALL DIAMETER3.770 INCHES NOMINAL IN
DIAL ILLUMINATIONNOT PROVIDED
DRIVE CONNECTION TYPEFLEXIBLE
SCALE SMALLEST INCREMENT50.0 REVOLUTIONS PER MINUTE
SHAFT ROTATION DIRECTIONCOUNTERCLOCKWISE
DIAL QUANTITY1
TOTALIZING MECHANISMPROVIDED
SCALE MEASUREMENT UNITREVOLUTIONS PER MINUTE AND REVOLUTIONS PER HOUR
SUBSTITUTES & CROSS-REFERENCES 2
551T2Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
A11190Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 551TZ?
551TZ is a TACHOMETER,MECHANICAL,FIXED MOUN manufactured by STEWART-WARNER CORPORATION.
What parts can replace 551TZ?
There are 2 known substitutes for 551TZ: 551T2, A11190. Substitute compatibility should be verified for your specific system.
What is the NSN for 551TZ?
551TZ is cataloged in the U.S. Government catalog under NSN 6680-00-403-5922. 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.