The Valve,positive Crankcase Ventila, cataloged under National Stock Number 2990-01-668-3659, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Advanced Products and Systems Division Div Advanced Products and Systems. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,positive Crankcase Ventila |
| FSC / FSG | 2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29) |
| Manufacturers | General Atomics Div General Atomics Electromagnetic Systems (CAGE 4XB60); Curtiss-Wright Electro-Mechanical Corporation Dba Advanced Products and Systems Division Div Advanced Products and Systems (CAGE 4B9X1) |
| Parameter | Value |
|---|---|
| NSN | 2990-01-668-3659 |
| Primary Part Number | 01D2908G01 |
| Item Name | Valve,positive Crankcase Ventila |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Advanced Products and Systems Division Div Advanced Products and Systems |
| Status | ACTIVE |
| 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 |
|---|---|
| 3890AS003191-01 | General Atomics Div General Atomics Electromagnetic Systems (USA) |
| 01D2908G01 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Advanced Products and Systems Division Div Advanced Products and Systems (USA) |
| Reference | Meaning |
|---|---|
| 3890AS003191-01 | 5/1 Secondary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 2990-01-668-3659 is a Valve,positive Crankcase Ventila, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Advanced Products and Systems Division Div Advanced Products and Systems, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-668-3659 has 2 manufacturer part numbers on file: 3890AS003191-01 (General Atomics Div General Atomics Electromagnetic Systems), 01D2908G01 (Curtiss-Wright Electro-Mechanical Corporation Dba Advanced Products and Systems Division Div Advanced Products and Systems).
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.