The Nut,operating,valve, cataloged under National Stock Number 4820-01-458-8638, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-458-8638 |
| Primary Part Number | PI-NB2502 6 INCH PART NO 5 |
| Item Name | Nut,operating,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PI-NB2502 6 INCH PART NO 5 PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| PI-NB2502 6 INCH PART NO 5 | 3/9 Design control — primary reference Pima Valve, Llc |
| PI-NB2502 6INCH | C/1 Advisory reference — outside the item-of-supply concept Pima Valve, Llc |
| PI-NB2502 | D/9 Drawing number reference only Pima Valve, Llc |
NSN 4820-01-458-8638 is a Nut,operating,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-458-8638 has 1 manufacturer part number on file: PI-NB2502 6 INCH PART NO 5 (Hunt Valve Company, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-462-4873. Verify interchangeability with system specifications before substitution.
Key specifications for PI-NB2502 6 INCH PART NO 5: End Item Identification: E/I VALVE GATE, CAGE 30263, NIMITZ CLASS CVN. 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.
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.