The Sleeve,starter Clutch, cataloged under National Stock Number 2990-00-149-8062, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2990-00-149-8062 |
| Primary Part Number | 1F0909 |
| Item Name | Sleeve,starter Clutch |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,2.125 IN. OD,1.750 IN. ID,6 HOLES 0.313 IN. DIA,0.313 IN. HOLE EACH SIDE,2.000 IN. LG SLOT,0.625 IN. W,5.875 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 |
|---|---|
| 1F0909 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 1F909 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 2990-00-149-8062 is a Sleeve,starter Clutch, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-149-8062 has 1 manufacturer part number on file: 1F0909 (Caterpillar Inc Div Caterpillar Defense).
1 possible match (shared part number, not a government interchangeability claim): 5950-00-631-2570. Verify interchangeability with system specifications before substitution.
Key specifications for 1F0909: General Characteristics Item Description: STEEL,2.125 IN. OD,1.750 IN. ID,6 HOLES 0.313 IN. DIA,0.313 IN. HOLE EACH SIDE,2.000 IN. LG SLOT,0.625 IN. W,5.875 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.