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D-1971S — VALVE,POPPET,ENGINE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

D-1971S: VALVE,POPPET,ENGINE.

The VALVE,POPPET,ENGINE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING SEAT FACE, head_style: FLAT, stem_style: GROOVED, stem_length: 6.6250 INCHES NOMINAL IN, stem_diameter: 0.4342 INCHES NOMINAL IN, outside_diameter: 1.8750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 2805-00-432-1963, 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
D-1971S
NSN: 2805-00-432-1963
FSC: 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
CAGE: 77220 — DANA CORP ENGINE PRODUCTS DIV (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING SEAT FACE
head_styleFLAT
stem_styleGROOVED
stem_length6.6250 INCHES NOMINAL IN
stem_diameter0.4342 INCHES NOMINAL IN
outside_diameter1.8750 INCHES NOMINAL IN
seat_angle_in_deg45.0
carbon_relief_grooveNOT INCLUDED
NSN2805-00-432-1963
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available VALVE,POPPET,ENGINE TITLE COMPONENT PN D-1971S MFR VALVE,POPPET,ENGINE
KEY FEATURES
•
STEM DIAMETER: 0.4342 INCHES NOMINAL IN
•
STEM LENGTH: 6.6250 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 45.0
•
OUTSIDE DIAMETER: 1.8750 INCHES NOMINAL IN
•
STEM STYLE: GROOVED
•
HEAD STYLE: FLAT
•
CARBON RELIEF GROOVE: NOT INCLUDED
•
MATERIAL: STEEL CORROSION RESISTING SEAT FACE
TECHNICAL CHARACTERISTICS
STEM DIAMETER0.4342 INCHES NOMINAL IN
STEM LENGTH6.6250 INCHES NOMINAL IN
SEAT ANGLE IN DEG45.0
OUTSIDE DIAMETER1.8750 INCHES NOMINAL IN
STEM STYLEGROOVED
HEAD STYLEFLAT
CARBON RELIEF GROOVENOT INCLUDED
MATERIALSTEEL CORROSION RESISTING SEAT FACE
OTHER ITEMS IN FSC 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2805-00-000-4022 2805-00-001-0029 2805-00-001-3527 2805-00-001-3844 2805-00-001-3854 2805-00-001-6154 2805-00-001-6164 2805-00-001-6575
SUBSTITUTES & CROSS-REFERENCES 3
2461813Reference document
Same NSN cross-reference
Reference document — Secondary reference
1971SReference document
Same NSN cross-reference
Reference document — Secondary reference
V2100SSTDReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D-1971S?
D-1971S is a VALVE,POPPET,ENGINE.
What parts can replace D-1971S?
There are 3 known substitutes for D-1971S: 2461813, 1971S, V2100SSTD. Substitute compatibility should be verified for your specific system.
What is the NSN for D-1971S?
D-1971S is cataloged in the U.S. Government catalog under NSN 2805-00-432-1963. 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.