The Seat,valve, cataloged under National Stock Number 4820-00-391-8249, 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 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-391-8249 |
| Primary Part Number | C50701-05 MEA |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.438 INCHES NOMINAL IN |
| Flange Diameter | 1.781 INCHES NOMINAL IN |
| Thread Length | 0.375 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Body Stepped Inside Diameter | 1.000 INCHES MINIMUM AND 1.312 INCHES MAXIMUM FIRST STEP IN |
| Body Stepped Inside Diameter | 1.010 INCHES MINIMUM AND 1.120 INCHES MAXIMUM SECOND STEP IN |
| Style Designator | THREADED FLANGED |
| Nominal Thread Size | 1.562 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.375 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 14 SINGLE THREADED PORTION |
| Material | STEEL OVERALL |
| Seat Angle in Deg | 42.000 NOMINAL |
| Thread Series Designator | UNS SINGLE THREADED PORTION |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| C50701-05 MEA PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| D15856 | 5/9 Secondary reference Hammel Dahl Inc |
| D15856 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| C50701-05 MEA | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-00-391-8249 is a Seat,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-391-8249 has 1 manufacturer part number on file: C50701-05 MEA (Hunt Valve Company, Inc.).
Key specifications for C50701-05 MEA: Flange Seat to Disk End Height: 0.438 INCHES NOMINAL IN; Flange Diameter: 1.781 INCHES NOMINAL IN; Thread Length: 0.375 INCHES NOMINAL SINGLE THREADED PORTION IN; Body Stepped Inside Diameter: 1.000 INCHES MINIMUM AND 1.312 INCHES MAXIMUM FIRST STEP IN. 14 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.