The Ring,piston, cataloged under National Stock Number 2805-00-443-0025, 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 Komatsu America Corp.. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-443-0025 |
| Primary Part Number | 615459C1 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Komatsu America Corp. |
| Status | ACTIVE |
| Cross-Sectional Shape Style | INSIDE COUNTERBORE, KEYSTONE, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.0938 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 4.500 INCHES IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 615459C1 | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 615459C1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 615459C1 | 3/9 Design control — primary reference Komatsu American Intl Co |
| 336128R1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 615459C1 | 5/9 Secondary reference U.S. Government activity |
NSN 2805-00-443-0025 is a Ring,piston, manufactured by Komatsu America Corp., classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-443-0025 has 1 manufacturer part number on file: 615459C1 (Komatsu America Corp.).
Key specifications for 615459C1: Overall Width: 0.1094 INCHES NOMINAL IN; Cross-Sectional Shape Style: INSIDE COUNTERBORE, KEYSTONE, STRAIGHT FACE; Joint Style: VERTICAL JOINT; Radial Wall Thickness: 0.0938 INCHES NOMINAL IN. 6 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.