The Guide,valve Stem, cataloged under National Stock Number 2815-00-866-4590, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Komatsu America Corp.. Government technical data includes 10 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-866-4590 |
| Primary Part Number | 277577R1 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Komatsu America Corp. |
| Status | ACTIVE |
| Aa End Chamfer Angle in Deg | 15.0 |
| Aa End Chamfer Length | 0.150 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 0.687 INCHES NOMINAL IN |
| Bb End Chamfer Length | 0.050 INCHES NOMINAL IN |
| Bb End Chamfer Angle in Deg | 30.0 |
| Bore Diameter | 0.4375 INCHES NOMINAL IN |
| Material | STEEL |
| Bore Countersink | NOT INCLUDED |
| 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 |
|---|---|
| 277577R1 | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 277577R1 | 5/9 Secondary reference U.S. Government activity |
| 277577R1 | 3/9 Design control — primary reference Komatsu American Intl Co |
| 125-3198 | 5/9 Secondary reference U.S. Government activity |
| 277577R1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
NSN 2815-00-866-4590 is a Guide,valve Stem, manufactured by Komatsu America Corp., classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-866-4590 has 1 manufacturer part number on file: 277577R1 (Komatsu America Corp.).
Key specifications for 277577R1: Aa End Chamfer Angle in Deg: 15.0; Aa End Chamfer Length: 0.150 INCHES NOMINAL IN; Style Designator: PLAIN; Overall Length: 3.418 INCHES NOMINAL IN. 10 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.