The Adapter,filler Neck, cataloged under National Stock Number 2990-01-657-3394, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Yanmar America Corporation. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-657-3394 |
| Primary Part Number | 171031-11741 |
| Item Name | Adapter,filler Neck |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Yanmar America Corporation |
| Status | ACTIVE |
| Overall Diameter | 43.00 MILLIMETERS MINIMUM AND 44.00 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 171031-11741 | K & M Equipment Rentals, Llc (USA) |
| 171031-11741 PRIMARY | Yanmar America Corporation (USA) |
| Reference | Meaning |
|---|---|
| 171031-11741 | 3/9 Design control — primary reference Yanmar Diesel America Corp |
NSN 2990-01-657-3394 is a Adapter,filler Neck, manufactured by Yanmar America Corporation, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-657-3394 has 2 manufacturer part numbers on file: 171031-11741 (K & M Equipment Rentals, Llc), 171031-11741 (Yanmar America Corporation).
Key specifications for 171031-11741: Overall Diameter: 43.00 MILLIMETERS MINIMUM AND 44.00 MILLIMETERS MAXIMUM MM; Overall Length: 90.0 MILLIMETERS NOMINAL MM; Part Name Assigned by Controlling Agency: OIL FILLER NECK. 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.