The Seat,valve, cataloged under National Stock Number 4820-01-618-5895, 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 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-618-5895 |
| Primary Part Number | C402501025 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Style Designator | PLAIN |
| Material Document and Classification | ASTM A494 GR -30H ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | NICKEL ALLOY OVERALL |
| 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 |
|---|---|
| C402501025 PRIMARY | Hunt Valve Company, Inc. (USA) |
| B-1620-E 2-1/2IN PC6 | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| B-1620-E 2-1/2IN PC6 | 5/9 Secondary reference Pima Valve, Llc |
| C402501025 | 3/9 Design control — primary reference Pima Valve, Llc |
NSN 4820-01-618-5895 is a Seat,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-618-5895 has 2 manufacturer part numbers on file: C402501025 (Hunt Valve Company, Inc.), B-1620-E 2-1/2IN PC6 (Hunt Valve Company, Inc.).
Key specifications for C402501025: Style Designator: PLAIN; Material Document and Classification: ASTM A494 GR -30H ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Special Features: CMS DATA ID 1359 PCCN SE0210 PLISN A003; NEXT HIGHER ASSEMBLY 4820-01-618-5865, CHECK VALVE B-1620-E 2-1/2 INCH IN; Part Name Assigned by Controlling Agency: SEAT RING. 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.