The Valve,poppet,engine, cataloged under National Stock Number 2805-01-048-0991, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-01-048-0991 |
| Primary Part Number | 9N180 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Stem Diameter | 0.3730 INCHES NOMINAL IN |
| Head Height | 0.1710 INCHES NOMINAL IN |
| Second Groove Width | 0.0625 INCHES NOMINAL IN |
| Stem Length | 5.7380 INCHES NOMINAL IN |
| Seat Angle in Deg | 30.0 |
| Chamfer Length | 0.1250 INCHES NOMINAL IN |
| Neck Radius | 0.4420 INCHES NOMINAL IN |
| Outside Diameter | 1.8940 INCHES NOMINAL IN |
| Distance From First Groove to Stem End | 0.2812 INCHES NOMINAL IN |
| Stem Style | DOUBLE GROOVED |
| First Groove Diameter | 0.3170 INCHES NOMINAL IN |
| Head Style | FLAT |
| Distance From Second Groove to Stem End | 0.4375 INCHES NOMINAL IN |
| Carbon Relief Groove | NOT INCLUDED |
| Chamfer Angle in Deg | 45.0 |
| Second Groove Diameter | 0.3170 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| First Groove Width | 0.0625 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 |
|---|---|
| 9N180 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 2805-01-048-0991 is a Valve,poppet,engine, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-01-048-0991 has 1 manufacturer part number on file: 9N180 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 9N180: Stem Diameter: 0.3730 INCHES NOMINAL IN; Head Height: 0.1710 INCHES NOMINAL IN; Second Groove Width: 0.0625 INCHES NOMINAL IN; Stem Length: 5.7380 INCHES NOMINAL IN. 18 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.