The Regulator,assembly, cataloged under National Stock Number 1040-00-300-4259, is classified within Federal Supply Class 1040 (Chemical Weapons and Equipment) of the Weapons group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Regulator,assembly |
| FSC / FSG | 1040 — Chemical Weapons and Equipment (FSG 10) |
| Manufacturers | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (CAGE 30003) |
| Parameter | Value |
|---|---|
| NSN | 1040-00-300-4259 |
| Primary Part Number | 54A50D28 |
| Item Name | Regulator,assembly |
| FSC / FSG | 1040 / 10 — Chemical Weapons and Equipment |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | V |
| Part Number | Manufacturer |
|---|---|
| 54A50D28 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 20626 | 3/2 Design control — primary reference U.S. Government activity |
| 54A50D28 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 1040-00-300-4259 is a Regulator,assembly, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 1040, Chemical Weapons and Equipment. Status: active.
NSN 1040-00-300-4259 has 1 manufacturer part number on file: 54A50D28 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
5 possible matches (shared part number, not a government interchangeability claim): 5355-00-942-8531, 6515-01-159-9288, 5310-01-229-5510. Verify interchangeability with system specifications before substitution.
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 1040-00-300-4259 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.