The Housing,valve, cataloged under National Stock Number 1650-00-673-3383, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Defense & Development Enterprises Llc. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1650-00-673-3383 |
| Primary Part Number | 20257-1 |
| Item Name | Housing,valve |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Defense & Development Enterprises Llc |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT HYDRAULIC SYSTEM |
| General Characteristics Item Description | ALUMINUM ALLOY 2024 T4,QQ&A&268 T4,0.750 IN. D,2.550 IN. LG IN |
| 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 |
|---|---|
| 20257-1 PRIMARY | Defense & Development Enterprises Llc (USA) |
| Reference | Meaning |
|---|---|
| 20257-1 | 5/2 Secondary reference U.S. Government activity |
| 20257-1 | 3/9 Design control — primary reference Triumph Thermal Systems - Maryland, Inc. |
NSN 1650-00-673-3383 is a Housing,valve, manufactured by Defense & Development Enterprises Llc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-673-3383 has 1 manufacturer part number on file: 20257-1 (Defense & Development Enterprises Llc).
1 possible match (shared part number, not a government interchangeability claim): 2990-01-504-5843. Verify interchangeability with system specifications before substitution.
Key specifications for 20257-1: FSC Application Data: AIRCRAFT HYDRAULIC SYSTEM; General Characteristics Item Description: ALUMINUM ALLOY 2024 T4,QQ&A&268 T4,0.750 IN. D,2.550 IN. LG IN. 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 1650-00-673-3383 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.