The Lock,valve Spring Retainer, cataloged under National Stock Number 2805-00-127-4685, 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 General Motors Llc Dba General Motors Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-127-4685 |
| Primary Part Number | 3947880 |
| Item Name | Lock,valve Spring Retainer |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Minimum Inside Diameter | 0.345 INCHES IN |
| Second Groove Width | 0.030 INCHES NOMINAL IN |
| Thread Provision | UNTHREADED |
| Largest Outside Diameter | 0.521 INCHES NOMINAL IN |
| Distance Between First and Second Groove Centers | 0.087 INCHES NOMINAL IN |
| Largest Inside Diameter | 0.372 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE W/TWO GROOVES |
| Distance From Bottom to First Groove Center | 0.188 INCHES NOMINAL IN |
| Outside Included Angle in Deg | 15.0 |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | STEEL |
| First Groove Width | 0.030 INCHES NOMINAL 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 |
|---|---|
| 3947880 | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 3947880 | 5/9 Secondary reference General Motors Corp |
| 3947880 | 3/9 Design control — primary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
NSN 2805-00-127-4685 is a Lock,valve Spring Retainer, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-127-4685 has 1 manufacturer part number on file: 3947880 (General Motors Llc Dba General Motors Llc).
Key specifications for 3947880: Overall Height: 0.378 INCHES NOMINAL IN; Minimum Inside Diameter: 0.345 INCHES IN; Second Groove Width: 0.030 INCHES NOMINAL IN; Thread Provision: UNTHREADED. 12 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.