The Starter,engine,air, cataloged under National Stock Number 2990-01-360-4451, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Royston Limited. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-360-4451 |
| Primary Part Number | 150BMP-2451B |
| Item Name | Starter,engine,air |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Royston Limited |
| 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 |
|---|---|
| 150BMP-2451B | Royston Limited (GBR) |
| 150BMP-2451 | Ingersoll-Rand European Sales Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 150BMP-2451B | 3/9 Design control — primary reference Ingersoll-Rand Co Proto Tool Div Tool Group Headquarters |
NSN 2990-01-360-4451 is a Starter,engine,air, manufactured by Royston Limited, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-360-4451 has 2 manufacturer part numbers on file: 150BMP-2451B (Royston Limited), 150BMP-2451 (Ingersoll-Rand European Sales Ltd).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-602-1217. Verify interchangeability with system specifications before substitution.
Key specifications for 150BMP-2451B: End Item Identification: FOR DIESEL ENGINE AIR STARTER. 0 specifications are 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.