The Governor Assembly,o, cataloged under National Stock Number 2990-00-186-4085, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cooper Machinery Services Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Governor Assembly,o |
| FSC / FSG | 2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29) |
| Manufacturers | Cooper Machinery Services Llc (CAGE 14541) |
| Parameter | Value |
|---|---|
| NSN | 2990-00-186-4085 |
| Primary Part Number | 012-228 |
| Item Name | Governor Assembly,o |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Cooper Machinery Services Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 012-228 PRIMARY | Cooper Machinery Services Llc (USA) |
| Reference | Meaning |
|---|---|
| Y012228 | 5/9 Secondary reference Cooper Cameron Corp Ajax-Superior Div |
| 4Y1567 | 5/9 Secondary reference Cooper Cameron Corp Ajax-Superior Div |
NSN 2990-00-186-4085 is a Governor Assembly,o, manufactured by Cooper Machinery Services Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-186-4085 has 1 manufacturer part number on file: 012-228 (Cooper Machinery Services Llc).
2 possible matches (shared part number, not a government interchangeability claim): 5980-01-104-5837, 5950-01-372-7678. Verify interchangeability with system specifications before substitution.
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.