The Valve,angle Relief, cataloged under National Stock Number 4820-01-550-4976, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-550-4976 |
| Item Name | Valve,angle Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| UB3NCRP30IMPP | 3/1 Design control — primary reference Dante Valve Company |
| DNX62-4P6-HPB AY UB3NCRP30IMPP | 5/9 Secondary reference Danco Valve Company |
| DNX62-4P6-HPBL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| DNX62 4P6BL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| DNX62 4P6B | 5/9 Secondary reference Danco Valve Company |
| UB3NCRP30IMPPL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| UB3NCRP30IMPP | 5/9 Secondary reference Danco Valve Company |
| DNX62-4P6-HPB AY UB3NCRP30IMPPL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| DNX62-4P6-HPB | 5/9 Secondary reference Danco Valve Company |
| DNX62-4P6-HPB | 5/1 Secondary reference Dante Valve Company |
| DNX62 4P6B | 5/1 Secondary reference Dante Valve Company |
| DNX62-4P6-HPB AY UB3NCRP30IMPP | 5/1 Secondary reference Dante Valve Company |
NSN 4820-01-550-4976 is a Valve,angle Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-553-3183. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-550-4976: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS. 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 4820-01-550-4976 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.