The Stem,fluid Valve, cataloged under National Stock Number 4820-01-388-5579, 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 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-388-5579 |
| Primary Part Number | B-1421E-0300 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Valve Type for Which Designed | STOP-CHECK |
| Stem Actuating End Type | THREADED INTERNALLY |
| Valve Model Number for Which Designed | B-1421-E |
| Material Document and Classification | QQ-N-281, CLA FED SPEC SINGLE MATERIAL RESPONSE |
| Features Provided | RISING STEM |
| Valve Size for Which Designed | 3.000 INCHES IN |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| B-1421E-0300 PRIMARY | Hunt Valve Company, Inc. (USA) |
| B-1421E-3IN ITEM 9 | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| B-1421E-3IN ITEM 9 | 5/9 Secondary reference Pima Valve, Llc |
| B-1421E-0300 | 3/9 Design control — primary reference Pima Valve, Llc |
| B-1421E-0300 IT | C/1 Advisory reference — outside the item-of-supply concept Pima Valve, Llc |
NSN 4820-01-388-5579 is a Stem,fluid Valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-388-5579 has 2 manufacturer part numbers on file: B-1421E-0300 (Hunt Valve Company, Inc.), B-1421E-3IN ITEM 9 (Hunt Valve Company, Inc.).
Key specifications for B-1421E-0300: Valve Type for Which Designed: STOP-CHECK; Stem Actuating End Type: THREADED INTERNALLY; Valve Model Number for Which Designed: B-1421-E; Material Document and Classification: QQ-N-281, CLA FED SPEC SINGLE MATERIAL RESPONSE. 7 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.