The Lock,valve Spring Retainer, cataloged under National Stock Number 2815-00-402-5186, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Cummins Inc.. Government technical data includes 11 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-402-5186 |
| Primary Part Number | 166772 |
| Item Name | Lock,valve Spring Retainer |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Minimum Inside Diameter | 0.350 INCHES IN |
| Thread Provision | UNTHREADED |
| Largest Outside Diameter | 0.516 INCHES NOMINAL IN |
| Largest Inside Diameter | 0.375 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE-TOP AND BOTTOM COUNTERBORE |
| Bottom Counterbore Depth | 0.125 INCHES NOMINAL IN |
| Largest Outside Width | 0.078 INCHES NOMINAL IN |
| Outside Included Angle in Deg | 7.5 |
| Casehardening Indicator | CASEHARDENED |
| Top Counterbore Depth | 0.125 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 166772 PRIMARY | Cummins Inc. (USA) |
NSN 2815-00-402-5186 is a Lock,valve Spring Retainer, manufactured by Cummins Inc., classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-402-5186 has 1 manufacturer part number on file: 166772 (Cummins Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-289-6574. Verify interchangeability with system specifications before substitution.
Key specifications for 166772: Overall Height: 0.375 INCHES NOMINAL IN; Minimum Inside Diameter: 0.350 INCHES IN; Thread Provision: UNTHREADED; Largest Outside Diameter: 0.516 INCHES NOMINAL IN. 11 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.