NSN 2805-01-055-8900 — this item is cataloged by the U.S. Government under National Stock Number 2805-01-055-8900. Manufacturer of record part number: 21901.
Also searched as2805-01-055-8900 ·
2805010558900 ·
NIIN 010558900 ·
01-055-8900 ·
FSC 2805 Gasoline Reciprocating Engines, Except Aircraft; and Components · CAGE 16780 · 21901
Body Outside Diameter: 0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN
Material Document and Classification: QQ-S-763, COMP 410 FED SPEC SINGLE MATERIAL RESPONSE
End Casehardening Indicator: NOT CASEHARDENED
End Hardness Rating: 31.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
Body Type: SOLID
Material: STEEL COMP 410
1 manufacturer part number on file
Identification
NSN: 2805-01-055-8900
NIIN: 010558900
FSC: 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
FSG: 28 — Engines, Turbines, and Components
Primary part number: 21901
Manufacturer: Eaton Aerospace Llc
General Description
The Push Rod,engine Poppet Valve, cataloged under National Stock Number 2805-01-055-8900, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Eaton Aerospace Llc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
NSN 2805-01-055-8900 is a Push Rod,engine Poppet Valve, manufactured by Eaton Aerospace Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
What part numbers are listed for NSN 2805-01-055-8900?
NSN 2805-01-055-8900 has 1 manufacturer part number on file: 21901 (Eaton Aerospace Llc).
What NSN replaces 2805-01-055-8900?
7 possible matches (shared part number, not a government interchangeability claim): 5998-01-073-6874, 5965-01-163-8958, 6605-01-336-5018. Verify interchangeability with system specifications before substitution.
What are the specifications of 21901?
Key specifications for 21901: Body Outside Diameter: 0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-763, COMP 410 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 1.048 INCHES MINIMUM AND 1.050 INCHES MAXIMUM IN; End Casehardening Indicator: NOT CASEHARDENED. 6 specifications are documented in the U.S. Government catalog.
Is NSN 2805-01-055-8900 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 2805-01-055-8900?
NSN 2805-01-055-8900 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.