The Adapter,flywheel Housing, cataloged under National Stock Number 2990-01-051-4240, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cummins Inc.. Government technical data includes 2 specifications, 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-051-4240 |
| Primary Part Number | 217012 |
| Item Name | Adapter,flywheel Housing |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | OD 9.000 INS NOM; 2.000 INS NOM EXTENSION AROUND 90 DEGREES OF PERIMETER; ID 5.875 INS NOM BACKSIDE; 5.000 INS NOM INNER BOLT CIRCLE; 7.750 INS NOM BOLTHOLES EQUALLY SPACED; 2.500 INS NOM DOWEL HOLES ON 5.500 INS NOM BOLT CIRCLE; OUTER BOLT CIRCLE CONSISTS OF 8 HOLES TAPPED THRU FOR 0.625 IN. NOM THD BOLTS; BOLT CIRCLE IS 7.500 INS NOM; THIS FACE CONTAINS 2.437 INS NOM HOLES TAPPED FOR 0.437 IN. NOM X 14 THDS LOCATED ON 8.000 INS NOM BOLT CIRCLE 180 DEGREES APART; 2.000 INS NOM DEPTH FACE TO BACK; INNER BOLT CIRCLE IS RECESSED 0.312 IN. NOM BELOW FACE IN WHICH OUTER BOLT CIRCLE IS DRILLED AND TAPPED IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 217012 PRIMARY | Cummins Inc. (USA) |
NSN 2990-01-051-4240 is a Adapter,flywheel Housing, manufactured by Cummins Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-051-4240 has 1 manufacturer part number on file: 217012 (Cummins Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-199-7759, 4730-01-478-3081. Verify interchangeability with system specifications before substitution.
Key specifications for 217012: General Characteristics Item Description: OD 9.000 INS NOM; 2.000 INS NOM EXTENSION AROUND 90 DEGREES OF PERIMETER; ID 5.875 INS NOM BACKSIDE; 5.000 INS NOM INNER BOLT CIRCLE; 7.750 INS NOM BOLTHOLES EQUALLY SPACED; 2.500 INS NOM DOWEL HOLES ON 5.500 INS NOM BOLT CIRCLE; OUTER BOLT CIRCLE CONSISTS OF 8 HOLES TAPPED THRU FOR 0.625 IN. NOM THD BOLTS; BOLT CIRCLE IS 7.500 INS NOM; THIS FACE CONTAINS 2.437 INS NOM HOLES TAPPED FOR 0.437 IN. NOM X 14 THDS LOCATED ON 8.000 INS NOM BOLT CIRCLE 180 DEGREES APART; 2.000 INS NOM DEPTH FACE TO BACK; INNER BOLT CIRCLE IS RECESSED 0.312 IN. NOM BELOW FACE IN WHICH OUTER BOLT CIRCLE IS DRILLED AND TAPPED IN; End Item Identification: CUMMINS VT903M DIESEL ENGINE ONBOARD 41 FT UTB COAST GUARD BOATS FT; Material: STEEL. 2 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.
NSN 2990-01-051-4240 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.