The Lock,valve Spring Retainer, cataloged under National Stock Number 2815-01-180-0636, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Fairbanks Morse, Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 2815-01-180-0636 |
| Primary Part Number | P424637N |
| Item Name | Lock,valve Spring Retainer |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| First Ridge Radius | 0.106 INCHES NOMINAL IN |
| Minimum Inside Diameter | 0.866 INCHES IN |
| Thread Provision | UNTHREADED |
| Largest Inside Diameter | 0.942 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE W/ONE RIDGE |
| Outside Included Angle in Deg | 14.3 |
| 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 |
|---|---|
| P424637N PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| P424637N | 5/9 Secondary reference U.S. Government activity |
| 29.019 | 5/9 Secondary reference Fluid Mechanics, Inc. |
NSN 2815-01-180-0636 is a Lock,valve Spring Retainer, manufactured by Fairbanks Morse, Llc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-01-180-0636 has 1 manufacturer part number on file: P424637N (Fairbanks Morse, Llc).
3 possible matches (shared part number, not a government interchangeability claim): 6640-01-327-3927, 6140-01-621-4182, 1005-01-631-0317. Verify interchangeability with system specifications before substitution.
Key specifications for P424637N: First Ridge Radius: 0.106 INCHES NOMINAL IN; Minimum Inside Diameter: 0.866 INCHES IN; Thread Provision: UNTHREADED; Largest Inside Diameter: 0.942 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.