The Check,valve,assembl, cataloged under National Stock Number 1040-00-300-4236, is classified within Federal Supply Class 1040 (Chemical Weapons and Equipment) of the Weapons group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Check,valve,assembl |
| FSC / FSG | 1040 — Chemical Weapons and Equipment (FSG 10) |
| Manufacturers | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (CAGE 30003); Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (CAGE 10001) |
| Parameter | Value |
|---|---|
| NSN | 1040-00-300-4236 |
| Primary Part Number | 54A50B20 |
| Item Name | Check,valve,assembl |
| FSC / FSG | 1040 / 10 — Chemical Weapons and Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 54A50B20 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 54A50B20 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 18922 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1040-00-300-4236 is a Check,valve,assembl, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1040, Chemical Weapons and Equipment. Status: active.
NSN 1040-00-300-4236 has 2 manufacturer part numbers on file: 54A50B20 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 54A50B20 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
3 possible matches (shared part number, not a government interchangeability claim): 5331-01-107-4962, 5330-01-169-6402, 7030-01-412-9077. 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 1040-00-300-4236 has DEMIL Code B. 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.