The Valve,regulating,oxygen System P, cataloged under National Stock Number 4820-01-426-7405, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-426-7405 |
| Primary Part Number | B-4JN-BK-PM |
| Item Name | Valve,regulating,oxygen System P |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B-4JN-BK-PM PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| B4JPM | C/1 Advisory reference — outside the item-of-supply concept Nupro Co |
| 1598AS142-1 | 5/9 Secondary reference Swagelok Co |
| 1598AS142-1 | 5/9 Secondary reference Nupro Co |
| B-4JN-PM-BK | C/1 Advisory reference — outside the item-of-supply concept Lacoja Inc Div Penn Fluid System Technologies |
NSN 4820-01-426-7405 is a Valve,regulating,oxygen System P, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-426-7405 has 1 manufacturer part number on file: B-4JN-BK-PM (Swagelok Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-463-4902. Verify interchangeability with system specifications before substitution.
Key specifications for B-4JN-BK-PM: End Item Identification: PREPROVISIONING SUPPORT NAVICP IS POE. 0 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 4820-01-426-7405 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.