The Ring Set,piston, cataloged under National Stock Number 2805-00-491-3208, 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 Napa Automotive Parts Co. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-491-3208 |
| Primary Part Number | 40564CP 040 |
| Item Name | Ring Set,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Napa Automotive Parts Co |
| Status | ACTIVE |
| Bore Diameter Oversize | 0.040 INCHES IN |
| Ring Set Component Parts | COMPRESSION RING,6; OIL RING,2 |
| Piston Accommodation Quantity | 2 |
| Standard Bore Diameter | 4.050 INCHES 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 |
|---|---|
| 40564CP 040 PRIMARY | Napa Automotive Parts Co (USA) |
| Reference | Meaning |
|---|---|
| C3AZ6148J | 5/9 Secondary reference Ford Motor Company |
| C3AZ6148J | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| C3AZ6148E | 5/9 Secondary reference U.S. Government activity |
NSN 2805-00-491-3208 is a Ring Set,piston, manufactured by Napa Automotive Parts Co, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-491-3208 has 1 manufacturer part number on file: 40564CP 040 (Napa Automotive Parts Co).
Key specifications for 40564CP 040: Bore Diameter Oversize: 0.040 INCHES IN; Ring Set Component Parts: COMPRESSION RING,6; OIL RING,2; Piston Accommodation Quantity: 2; Standard Bore Diameter: 4.050 INCHES IN. 4 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.