The Nut,operating,valve, cataloged under National Stock Number 4820-01-435-1944, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-435-1944 |
| Primary Part Number | PI-NB2502 ITEM 5 4IN |
| Item Name | Nut,operating,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL: BRONZE PER ASTM B61 |
| 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 ITEM 5 4IN PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| PI-NB2502 ITEM 5 4IN | 3/9 Design control — primary reference Pima Valve, Llc |
| PI-NB2502-5-4.0 | 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 4820-01-435-1944 is a Nut,operating,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-435-1944 has 1 manufacturer part number on file: PI-NB2502 ITEM 5 4IN (Hunt Valve Company, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-458-8638, 4820-01-462-4873. Verify interchangeability with system specifications before substitution.
Key specifications for PI-NB2502 ITEM 5 4IN: General Characteristics Item Description: MATERIAL: BRONZE PER ASTM B61; End Item Identification: NIMITZ CLASS CVN. 1 specification is 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.