The Adapter,filler Neck, cataloged under National Stock Number 2990-01-340-4090, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-340-4090 |
| Item Name | Adapter,filler Neck |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| General Characteristics Item Description | 5.969 IN MIN AND 6.031 IN MAX O/A DIA.; 12 HOLES 0.210 MIN AND 0.230 IN. MAX DIA ON A 5.125 IN DIA B.C.; 1.031 IN. MIN AND 1.062 IN. MAX THK.; FURNISHED WITH LANYARD TAB IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 38897 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-01-340-4090 is a Adapter,filler Neck, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-01-340-4090: General Characteristics Item Description: 5.969 IN MIN AND 6.031 IN MAX O/A DIA.; 12 HOLES 0.210 MIN AND 0.230 IN. MAX DIA ON A 5.125 IN DIA B.C.; 1.031 IN. MIN AND 1.062 IN. MAX THK.; FURNISHED WITH LANYARD TAB 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.