The Seat,valve, cataloged under National Stock Number 4820-01-137-8227, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tate Andale, Llc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-137-8227 |
| Primary Part Number | 2350-823 PC 10 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tate Andale, Llc |
| Status | ACTIVE |
| Body Outside Diameter | 6.625 INCHES NOMINAL IN |
| Thread Length | 0.500 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Body Stepped Inside Diameter | 5.125 INCHES MINIMUM AND 6.000 INCHES MAXIMUM FIRST STEP IN |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 6.625 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 12 SINGLE THREADED PORTION |
| Material | NICKEL ALLOY OVERALL |
| Seat Angle in Deg | 45.000 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 |
|---|---|
| 509-4325672 PC 10 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 2350-823 PC 10 PRIMARY | Tate Andale, Llc (USA) |
| 2350-823 PC 10 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 509-4325672 PC | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2350-823 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4325672 | D/9 Drawing number reference only U.S. Government activity |
| 4325672 PC 10 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-137-8227 is a Seat,valve, manufactured by Tate Andale, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-137-8227 has 3 manufacturer part numbers on file: 509-4325672 PC 10 (Huntington Ingalls Inc Div Newport News Shipbuilding), 2350-823 PC 10 (Tate Andale, Llc), 2350-823 PC 10 (Huntington Ingalls Inc Div Newport News Shipbuilding).
8 possible matches (shared part number, not a government interchangeability claim): 4820-01-158-1885, 4820-01-437-8103, 4820-01-437-8877. Verify interchangeability with system specifications before substitution.
Key specifications for 2350-823 PC 10: Overall Height: 0.625 INCHES NOMINAL IN; Body Outside Diameter: 6.625 INCHES NOMINAL IN; Thread Length: 0.500 INCHES NOMINAL SINGLE THREADED PORTION IN; Body Stepped Inside Diameter: 5.125 INCHES MINIMUM AND 6.000 INCHES MAXIMUM FIRST STEP IN. 12 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.