The Lock,valve Spring,retainer, cataloged under National Stock Number 2815-00-362-7986, 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 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-362-7986 |
| Primary Part Number | 2A3291 |
| Item Name | Lock,valve Spring,retainer |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,0.505 IN.OD,0.444 IN.LG,1 @OUTSIDE GROOVE CENTERED 0.222 IN.FROM EDGE,0.085 IN.WIDE,0.035 IN DEEPIST END OUTSIDE EDGE 0.025IN.RADIUS,CENTER HOLE COUNTERSINK 30 DEG ANGLE 0.050IN.DEEP,0.138 FROM OUTSIDE EDGE,0.275 IN.HOLE DIA,2NDEND OUTSIDE EDGE 45 DEG CHAMFER,0.050 IN.LG,0.342 IN.HOLE DIA,0.100 IN.FROM EDGE 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 |
|---|---|
| LK138 | Trw Inc Trw Intl Trade Government Sales Dept (USA) |
| R158 | Eaton Corp Dba Eaton Aerospace Jackson (USA) |
| 2A3291 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| IPD2A3291 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
| U137 | 5/9 Secondary reference U.S. Government activity |
| LK138 | 5/9 Secondary reference Toledo Pickling & Steel Sales |
| H226 | 5/9 Secondary reference Dana Corp Engine Products Div |
NSN 2815-00-362-7986 is a Lock,valve Spring,retainer, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-362-7986 has 3 manufacturer part numbers on file: LK138 (Trw Inc Trw Intl Trade Government Sales Dept), R158 (Eaton Corp Dba Eaton Aerospace Jackson), 2A3291 (Caterpillar Inc Div Caterpillar Defense).
4 possible matches (shared part number, not a government interchangeability claim): 5365-00-424-5402, 2940-00-977-8742, 5985-01-077-7233. Verify interchangeability with system specifications before substitution.
Key specifications for 2A3291: General Characteristics Item Description: STEEL,0.505 IN.OD,0.444 IN.LG,1 @OUTSIDE GROOVE CENTERED 0.222 IN.FROM EDGE,0.085 IN.WIDE,0.035 IN DEEPIST END OUTSIDE EDGE 0.025IN.RADIUS,CENTER HOLE COUNTERSINK 30 DEG ANGLE 0.050IN.DEEP,0.138 FROM OUTSIDE EDGE,0.275 IN.HOLE DIA,2NDEND OUTSIDE EDGE 45 DEG CHAMFER,0.050 IN.LG,0.342 IN.HOLE DIA,0.100 IN.FROM EDGE IN. 1 specification is 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.