The Ring,piston, cataloged under National Stock Number 2805-00-413-2453, 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 Perez Machine, Inc. Dba Perez Machine Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-413-2453 |
| Primary Part Number | 291AS403 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Perez Machine, Inc. Dba Perez Machine Inc |
| Status | ACTIVE |
| FSC Application Data | RACK,BOMBEJECTOR,ACFT |
| Material Document and Classification | DMS1662 H 11 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.0390 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | CHROMIUM OVERALL |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 291AS403 PRIMARY | Perez Machine, Inc. Dba Perez Machine Inc (USA) |
| 291AS403 | Preci-Manufacturing, Incorporated (USA) |
| 291AS403 | Kampi Components Co Inc (USA) |
| 291AS403 | Lee Precision Machine Shop Inc (USA) |
| Reference | Meaning |
|---|---|
| 291AS403 | 5/9 Secondary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 2815994-1 | 5/9 Secondary reference U.S. Government activity |
NSN 2805-00-413-2453 is a Ring,piston, manufactured by Perez Machine, Inc. Dba Perez Machine Inc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-413-2453 has 4 manufacturer part numbers on file: 291AS403 (Perez Machine, Inc. Dba Perez Machine Inc), 291AS403 (Preci-Manufacturing, Incorporated), 291AS403 (Kampi Components Co Inc), 291AS403 (Lee Precision Machine Shop Inc).
Key specifications for 291AS403: FSC Application Data: RACK,BOMBEJECTOR,ACFT; Overall Width: 0.0890 INCHES MINIMUM AND 0.0920 INCHES MAXIMUM IN; Material Document and Classification: DMS1662 H 11 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE. 8 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.
NSN 2805-00-413-2453 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.