The Valve,poppet,engine, cataloged under National Stock Number 2805-00-481-3551, 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 Trw Inc Trw Intl Trade Government Sales Dept. Government technical data includes 15 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-481-3551 |
| Primary Part Number | S-2563 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Trw Inc Trw Intl Trade Government Sales Dept |
| Status | ACTIVE |
| Stem Diameter | 0.3420 INCHES NOMINAL IN |
| Head Height | 0.1562 INCHES NOMINAL IN |
| Stem Length | 4.8593 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Chamfer Length | 0.0156 INCHES NOMINAL IN |
| Neck Radius | 0.2812 INCHES NOMINAL IN |
| Groove Diameter | 0.3980 INCHES NOMINAL IN |
| Distance From Groove to Stem End | 0.3750 INCHES NOMINAL IN |
| Outside Diameter | 1.4531 INCHES NOMINAL IN |
| Stem Style | GROOVED |
| Head Style | FLAT |
| Carbon Relief Groove | NOT INCLUDED |
| Chamfer Angle in Deg | 30.0 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Groove Width | 0.1250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| S-2563 PRIMARY | Trw Inc Trw Intl Trade Government Sales Dept (USA) |
| Reference | Meaning |
|---|---|
| 2011 | 5/9 Secondary reference Napasco International Inc |
| D-2011 | 3/2 Design control — primary reference U.S. Government activity |
| C6AZ6505J | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| V2168STD | 5/9 Secondary reference Mcquay-Norris Inc Oem Div an Skf Industries Co |
| VE-1784STD | C/1 Advisory reference — outside the item-of-supply concept Bosch Automotive Service Solutions Inc. |
| VE-1784STD | 5/9 Secondary reference Spx Corp |
NSN 2805-00-481-3551 is a Valve,poppet,engine, manufactured by Trw Inc Trw Intl Trade Government Sales Dept, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-481-3551 has 1 manufacturer part number on file: S-2563 (Trw Inc Trw Intl Trade Government Sales Dept).
1 possible match (shared part number, not a government interchangeability claim): 2540-00-997-2411. Verify interchangeability with system specifications before substitution.
Key specifications for S-2563: Stem Diameter: 0.3420 INCHES NOMINAL IN; Head Height: 0.1562 INCHES NOMINAL IN; Stem Length: 4.8593 INCHES NOMINAL IN; Seat Angle in Deg: 45.0. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.