The Ring,exhaust Sealing, cataloged under National Stock Number 2990-00-402-0485, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2990-00-402-0485 |
| Primary Part Number | 3768711 |
| Item Name | Ring,exhaust Sealing |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| General Characteristics Item Description | CAST IRON;3.040 IN. OD;2.500 IN. ID;0.500 IN. THK;V SHAPED INSIDE AND OUTSIDE 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 |
|---|---|
| 3768711 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 3768711 | C/1 Advisory reference — outside the item-of-supply concept Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 3768711 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 2990-00-402-0485 is a Ring,exhaust Sealing, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-402-0485 has 1 manufacturer part number on file: 3768711 (General Motors Llc Dba General Motors Llc).
Key specifications for 3768711: General Characteristics Item Description: CAST IRON;3.040 IN. OD;2.500 IN. ID;0.500 IN. THK;V SHAPED INSIDE AND OUTSIDE 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.