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XC40971 — VALVE,POPPET,ENGINE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

XC40971: VALVE,POPPET,ENGINE.

The VALVE,POPPET,ENGINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT, stem_style: GROOVED, head_height: 0.2030 INCHES NOMINAL IN, neck_radius: 0.6400 INCHES NOMINAL IN, groove_width: 0.1250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 2815-00-847-2295, 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
XC40971
NSN: 2815-00-847-2295
FSC: 2815 — Diesel Engines and Components
CAGE: 76255 — MCQUAY-NORRIS INC OEM DIV AN SKF INDUSTRIES CO
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT
stem_styleGROOVED
head_height0.2030 INCHES NOMINAL IN
neck_radius0.6400 INCHES NOMINAL IN
groove_width0.1250 INCHES NOMINAL IN
groove_diameter0.4840 INCHES NOMINAL IN
outside_diameter1.7030 INCHES NOMINAL IN
seat_angle_in_deg45.0
carbon_relief_grooveNOT INCLUDED
distance_from_groove_to_stem_end0.2500 INCHES NOMINAL IN
NSN2815-00-847-2295
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available VALVE,POPPET,ENGINE TITLE COMPONENT PN XC40971 MFR VALVE,POPPET,ENGINE
KEY FEATURES
•
HEAD HEIGHT: 0.2030 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 45.0
•
NECK RADIUS: 0.6400 INCHES NOMINAL IN
•
GROOVE DIAMETER: 0.4840 INCHES NOMINAL IN
•
DISTANCE FROM GROOVE TO STEM END: 0.2500 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 1.7030 INCHES NOMINAL IN
•
STEM STYLE: GROOVED
•
HEAD STYLE: FLAT
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.2030 INCHES NOMINAL IN
SEAT ANGLE IN DEG45.0
NECK RADIUS0.6400 INCHES NOMINAL IN
GROOVE DIAMETER0.4840 INCHES NOMINAL IN
DISTANCE FROM GROOVE TO STEM END0.2500 INCHES NOMINAL IN
OUTSIDE DIAMETER1.7030 INCHES NOMINAL IN
STEM STYLEGROOVED
HEAD STYLEFLAT
CARBON RELIEF GROOVENOT INCLUDED
MATERIALSTEEL OVERALL
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 3
341057R3Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
AX5271Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
341057R2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is XC40971?
XC40971 is a VALVE,POPPET,ENGINE.
What parts can replace XC40971?
There are 3 known substitutes for XC40971: 341057R3, AX5271, 341057R2. Substitute compatibility should be verified for your specific system.
What is the NSN for XC40971?
XC40971 is cataloged in the U.S. Government catalog under NSN 2815-00-847-2295. 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.