The Water Pump Idler Assembly, cataloged under National Stock Number 2930-00-221-9017, is classified within Federal Supply Class 2930 (Engine Cooling System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cooper Machinery Services Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2930-00-221-9017 |
| Primary Part Number | 4Y-1898 |
| Item Name | Water Pump Idler Assembly |
| FSC / FSG | 2930 / 29 — Engine Cooling System Components, Nonaircraft |
| Manufacturer | Cooper Machinery Services Llc |
| Status | ACTIVE |
| General Characteristics Item Description | CAST IRON PULLEY WITH STEEL IDLER SHAFT AND BELT TIGHTENER ASSEMBLY,FIVE 0.625 IN. W,V-SHAPE GROOVES,5.720 IN. OD,3.258 IN. OVER ALL W OF FACE,5.750 IN. OVER ALL SHAFT 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 |
|---|---|
| 4Y-1898 PRIMARY | Cooper Machinery Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 4Y1898 | 5/9 Secondary reference Cooper Cameron Corp Ajax-Superior Div |
NSN 2930-00-221-9017 is a Water Pump Idler Assembly, manufactured by Cooper Machinery Services Llc, classified under FSC 2930, Engine Cooling System Components, Nonaircraft. Status: active.
NSN 2930-00-221-9017 has 1 manufacturer part number on file: 4Y-1898 (Cooper Machinery Services Llc).
Key specifications for 4Y-1898: General Characteristics Item Description: CAST IRON PULLEY WITH STEEL IDLER SHAFT AND BELT TIGHTENER ASSEMBLY,FIVE 0.625 IN. W,V-SHAPE GROOVES,5.720 IN. OD,3.258 IN. OVER ALL W OF FACE,5.750 IN. OVER ALL SHAFT 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.