The Valve,positive Crankcase Ventila, cataloged under National Stock Number 2990-01-026-0658, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Trw Inc Trw Intl Trade Government Sales Dept. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-026-0658 |
| Primary Part Number | PV-658 |
| Item Name | Valve,positive Crankcase Ventila |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Trw Inc Trw Intl Trade Government Sales Dept |
| Status | ACTIVE |
| Design Form | STRAIGHT |
| 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 |
|---|---|
| PV-658 | Trw Inc Trw Intl Trade Government Sales Dept (USA) |
| 6421980 | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 6487532 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| PCV220 | 5/9 Secondary reference U.S. Government activity |
| 6487532 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 6421980 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| CV769C | 3/9 Design control — primary reference General Motors Llc Dba General Motors |
NSN 2990-01-026-0658 is a Valve,positive Crankcase Ventila, manufactured by Trw Inc Trw Intl Trade Government Sales Dept, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-026-0658 has 2 manufacturer part numbers on file: PV-658 (Trw Inc Trw Intl Trade Government Sales Dept), 6421980 (General Motors Llc Dba General Motors Llc).
Key specifications for PV-658: Design Form: STRAIGHT. 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.