The Retainer,disk,valve, cataloged under National Stock Number 4810-01-443-7641, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 4810-01-443-7641 |
| Primary Part Number | A-NB25221E-03-5IN-8 |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Material Document and Classification | QQ-N-288, COMP A FED SPEC SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 5.000 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 |
|---|---|
| A-NB25221E-03-5IN-8 PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| A-NB25221E-03 | D/9 Drawing number reference only Pima Valve, Llc |
| A-NB25221E-03-5IN-8 | 3/9 Design control — primary reference Pima Valve, Llc |
NSN 4810-01-443-7641 is a Retainer,disk,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-443-7641 has 1 manufacturer part number on file: A-NB25221E-03-5IN-8 (Hunt Valve Company, Inc.).
5 possible matches (shared part number, not a government interchangeability claim): 4810-01-443-8650, 4810-01-443-8669, 4820-01-448-6739. Verify interchangeability with system specifications before substitution.
Key specifications for A-NB25221E-03-5IN-8: Material Document and Classification: QQ-N-288, COMP A FED SPEC SINGLE MATERIAL RESPONSE; Valve Size for Which Designed: 5.000 INCHES IN; Special Features: FOR GLOBE VALVE; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 3 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.