The Window Unit Assy, cataloged under National Stock Number 1680-00-021-4250, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Rosemount Aerospace Inc Dba Rosemount Aerospace Inc. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-00-021-4250 |
| Primary Part Number | 2318M-58-11 |
| Item Name | Window Unit Assy |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Rosemount Aerospace Inc Dba Rosemount Aerospace Inc |
| Status | ACTIVE |
| General Characteristics Item Description | MOUNTING METHOD,BOLT |
| Thread Size and Series/type Designator | 0.190-32 UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2318M-58-11 PRIMARY | Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (USA) |
| XW21008-1-11 | Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (USA) |
| Reference | Meaning |
|---|---|
| 123SCH182-11 | 7/9 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 123SCH182-11 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 1680-00-021-4250 is a Window Unit Assy, manufactured by Rosemount Aerospace Inc Dba Rosemount Aerospace Inc, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-00-021-4250 has 2 manufacturer part numbers on file: 2318M-58-11 (Rosemount Aerospace Inc Dba Rosemount Aerospace Inc), XW21008-1-11 (Rosemount Aerospace Inc Dba Rosemount Aerospace Inc).
Key specifications for 2318M-58-11: General Characteristics Item Description: MOUNTING METHOD,BOLT; Thread Size and Series/type Designator: 0.190-32 UNF. 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 1680-00-021-4250 has DEMIL Code Q. 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.