The Piston,accumulator,governor, cataloged under National Stock Number 2990-01-075-4721, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Woodward, Inc.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-075-4721 |
| Primary Part Number | 9987-961230 |
| Item Name | Piston,accumulator,governor |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Woodward, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | STEE,CASEHARDENED,0.875 IN. OD;OUTER PERIPHERY HAS SMALL OIL GROOVES;0.430 IN. ID,2.500 IN. LG;TOP OF PESTON;FOUR HOLES EQUALLY SPECED ON OUTER PERIPHERY 0.160 IN. HOLES DIA;0.812 IN. OD AT TOP OF PISTION 2.610 IN. O/A LG 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 |
|---|---|
| 9987-961230 | Woodward, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 367192 | 3/9 Design control — primary reference Woodward, Inc. Div Fuel Systems and Controls |
| 9987-961 | D/9 Drawing number reference only Woodward, Inc. Div Fuel Systems and Controls |
| 9987-961-PC230 | 5/9 Secondary reference Woodward, Inc. Div Fuel Systems and Controls |
NSN 2990-01-075-4721 is a Piston,accumulator,governor, manufactured by Woodward, Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-075-4721 has 1 manufacturer part number on file: 9987-961230 (Woodward, Inc.).
Key specifications for 9987-961230: General Characteristics Item Description: STEE,CASEHARDENED,0.875 IN. OD;OUTER PERIPHERY HAS SMALL OIL GROOVES;0.430 IN. ID,2.500 IN. LG;TOP OF PESTON;FOUR HOLES EQUALLY SPECED ON OUTER PERIPHERY 0.160 IN. HOLES DIA;0.812 IN. OD AT TOP OF PISTION 2.610 IN. O/A LG 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.