The Valve,poppet,engine, cataloged under National Stock Number 2815-00-007-2291, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 21 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-007-2291 |
| Primary Part Number | 1-8N3725 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Stem Diameter | 0.3714 INCHES MINIMUM AND 0.3720 INCHES MAXIMUM IN |
| Head Height | 0.2000 INCHES NOMINAL IN |
| Second Groove Width | 0.0300 INCHES MINIMUM AND 0.0320 INCHES MAXIMUM IN |
| Stem Length | 5.8070 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.4 |
| Chamfer Length | 0.0300 INCHES NOMINAL IN |
| Neck Radius | 0.6200 INCHES NOMINAL IN |
| Metallic Hardness Rating and Location | 50.0 ROCKWELL SUPERFICIAL 30-N MINIMUM STEM |
| Metallic Hardness Rating and Location | 60.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM STEM |
| Metallic Hardness Rating and Location | 67.0 ROCKWELL SUPERFICIAL 30-N MINIMUM TIP |
| Metallic Hardness Rating and Location | 76.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM TIP |
| Outside Diameter | 1.5650 INCHES NOMINAL IN |
| Distance From First Groove to Stem End | 0.3160 INCHES NOMINAL IN |
| Stem Style | DOUBLE GROOVED |
| First Groove Diameter | 0.3020 INCHES MINIMUM AND 0.3080 INCHES MAXIMUM IN |
| Head Style | FLAT |
| Distance From Second Groove to Stem End | 0.4720 INCHES NOMINAL IN |
| Carbon Relief Groove | NOT INCLUDED |
| Chamfer Angle in Deg | 45.0 |
| Second Groove Diameter | 0.3020 INCHES MINIMUM AND 0.3080 INCHES MAXIMUM IN |
| First Groove Width | 0.2500 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM 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 |
|---|---|
| 1-8N3725 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| IPD1P2629 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
| 1P2629 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
| IPD8N3725 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
| MILE11276 | 4/1 Identification reference U.S. Government activity |
| QPL11276 | 5/1 Secondary reference U.S. Government activity |
NSN 2815-00-007-2291 is a Valve,poppet,engine, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-007-2291 has 1 manufacturer part number on file: 1-8N3725 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 1-8N3725: Stem Diameter: 0.3714 INCHES MINIMUM AND 0.3720 INCHES MAXIMUM IN; Head Height: 0.2000 INCHES NOMINAL IN; Second Groove Width: 0.0300 INCHES MINIMUM AND 0.0320 INCHES MAXIMUM IN; Stem Length: 5.8070 INCHES NOMINAL IN. 21 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.