The Disk,valve, cataloged under National Stock Number 4820-01-162-6725, 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 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-162-6725 |
| Primary Part Number | 2601-339 PIECE 6 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Outside Diameter | 5.312 INCHES NOMINAL IN |
| Nominal Thread Size | 2.250 INCHES IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY |
| Thread Series Designator | UN |
| 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 |
|---|---|
| 2601-339 PIECE 6 | Hunt Valve Company, Inc. (USA) |
| 2601-339 PIECE 6 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 2601-339 PIECE 6 | 3/9 Design control — primary reference P J Valves Inc |
| 2601-339 PIECE 6 | 5/9 Secondary reference Morland Valve Co Inc Sub of Smith Valve Corp |
| 2601-339 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 504-4325676 | D/9 Drawing number reference only U.S. Government activity |
| 504-4325676 PIECE 6 | 5/2 Secondary reference U.S. Government activity |
| 2601-339 PIECE 6 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-162-6725 is a Disk,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-162-6725 has 2 manufacturer part numbers on file: 2601-339 PIECE 6 (Hunt Valve Company, Inc.), 2601-339 PIECE 6 (Derbyshire Machine & Tool Co).
4 possible matches (shared part number, not a government interchangeability claim): 4810-01-413-5068, 4810-01-414-0406, 4820-01-414-5575. Verify interchangeability with system specifications before substitution.
Key specifications for 2601-339 PIECE 6: Overall Height: 4.750 INCHES NOMINAL IN; Outside Diameter: 5.312 INCHES NOMINAL IN; Nominal Thread Size: 2.250 INCHES IN; Thread Class: 2B. 6 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.