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2121580 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The VALVE,POPPET,ENGINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT, stem_style: DOUBLE GROOVED, head_height: 0.0790 INCHES NOMINAL IN, neck_radius: 0.2500 INCHES NOMINAL IN, stem_length: 3.6812 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-444-1778, 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
2121580
NSN: 2805-00-444-1778
FSC: 2805
CAGE: 93334 — ATWOOD FENCE CO INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT
stem_styleDOUBLE GROOVED
head_height0.0790 INCHES NOMINAL IN
neck_radius0.2500 INCHES NOMINAL IN
stem_length3.6812 INCHES NOMINAL IN
stem_diameter0.3700 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN
chamfer_length0.0620 INCHES NOMINAL IN
outside_diameter1.6150 INCHES MINIMUM AND 1.6750 INCHES MAXIMUM IN
seat_angle_in_deg45.0
first_groove_width0.3500 INCHES NOMINAL IN
second_groove_width0.3500 INCHES NOMINAL IN
NSN2805-00-444-1778
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available VALVE,POPPET,ENGINE TITLE COMPONENT PN 2121580 MFR VALVE,POPPET,ENGINE
KEY FEATURES
•
FIRST GROOVE WIDTH: 0.3500 INCHES NOMINAL IN
•
SECOND GROOVE DIAMETER: 0.1250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STEM STYLE: DOUBLE GROOVED
•
STEM LENGTH: 3.6812 INCHES NOMINAL IN
•
FIRST GROOVE DIAMETER: 0.1250 INCHES NOMINAL IN
•
CHAMFER ANGLE IN DEG: 45.0
•
DISTANCE FROM SECOND GROOVE TO STEM END: 0.8598 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
FIRST GROOVE WIDTH0.3500 INCHES NOMINAL IN
SECOND GROOVE DIAMETER0.1250 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STEM STYLEDOUBLE GROOVED
STEM LENGTH3.6812 INCHES NOMINAL IN
FIRST GROOVE DIAMETER0.1250 INCHES NOMINAL IN
CHAMFER ANGLE IN DEG45.0
DISTANCE FROM SECOND GROOVE TO STEM END0.8598 INCHES NOMINAL IN
CARBON RELIEF GROOVENOT INCLUDED
CHAMFER LENGTH0.0620 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
V1434Interchangeable
interchangeable cross-reference
interchangeable
V2310Interchangeable
interchangeable cross-reference
interchangeable
1947623Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2121580?
2121580 is a VALVE,POPPET,ENGINE.
What parts can replace 2121580?
There are 3 known substitutes for 2121580: V1434, V2310, 1947623. Substitute compatibility should be verified for your specific system.
What is the NSN for 2121580?
2121580 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-444-1778. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026