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SX3173 — VALVE,POPPET,ENGINE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

SX3173: VALVE,POPPET,ENGINE.

The VALVE,POPPET,ENGINE is a the manufacturer industrial component. Key specifications include head_style: FLAT, stem_style: GROOVED, stem_length: 6.8550 INCHES NOMINAL IN, stem_diameter: 0.4960 INCHES NOMINAL IN, outside_diameter: 1.8900 INCHES NOMINAL IN, special_features: USE ON MACK TRK. This part is cataloged in the U.S.

Government catalog under NSN 2815-01-254-1523, 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
SX3173
NSN: 2815-01-254-1523
FSC: 2815 — Diesel Engines and Components
CAGE: 31033 — TRW INC TRW INTL TRADE GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
head_styleFLAT
stem_styleGROOVED
stem_length6.8550 INCHES NOMINAL IN
stem_diameter0.4960 INCHES NOMINAL IN
outside_diameter1.8900 INCHES NOMINAL IN
special_featuresUSE ON MACK TRK
unable_to_decodeUNABLE TO DECODE
seat_angle_in_deg60.0
NSN2815-01-254-1523
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available VALVE,POPPET,ENGINE TITLE COMPONENT PN SX3173 MFR VALVE,POPPET,ENGINE
KEY FEATURES
•
STEM DIAMETER: 0.4960 INCHES NOMINAL IN
•
STEM LENGTH: 6.8550 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 60.0
•
OUTSIDE DIAMETER: 1.8900 INCHES NOMINAL IN
•
STEM STYLE: GROOVED
•
HEAD STYLE: FLAT
•
UNABLE TO DECODE: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS
STEM DIAMETER0.4960 INCHES NOMINAL IN
STEM LENGTH6.8550 INCHES NOMINAL IN
SEAT ANGLE IN DEG60.0
OUTSIDE DIAMETER1.8900 INCHES NOMINAL IN
STEM STYLEGROOVED
HEAD STYLEFLAT
SPECIAL FEATURESUSE ON MACK TRK
UNABLE TO DECODEUNABLE TO DECODE
OTHER ITEMS IN FSC 2815 — Diesel Engines and Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2815-00-000-0075 2815-00-001-0022 2815-00-001-3475 2815-00-001-7728 2815-00-001-7737 2815-00-001-7805 2815-00-001-7806 2815-00-001-7813
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SX3173?
SX3173 is a VALVE,POPPET,ENGINE.
What is the NSN for SX3173?
SX3173 is cataloged in the U.S. Government catalog under NSN 2815-01-254-1523. 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.