The Seat,valve, cataloged under National Stock Number 4820-01-314-7381, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-314-7381 |
| Primary Part Number | 2640-801X2PC23Q3 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | ITEMS THAT SUPPORT A LEVEL I OR SUBSAFE CRITICAL SYSTEM/COMPONENT THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS AND REQUIRES OBJECTIVE QUALITY EVIDENCE (OQE) TRACEABLE TO PERMANENT MARKING ON THE MATERIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 2640-801X2PC23Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 845-4687566 ITEM 8Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 255721PC4Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7284884 PIECE 43Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2640-801X2 PC23TQ3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-405-01ITEM63Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2640-771X1 PIECE 3, ULTM1000Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 255416 PIECE 3MODQ3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2640-770X3 PIECE 4, ULTM1000Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 255416 PIECE 3MOD | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 2640-801X2PC23 | 5/1 Secondary reference U.S. Government activity |
| 845-4687566 ITEM 8 | 5/1 Secondary reference Naval Sea Systems Command |
| 2640-771X1 PIECE 3, ULTM1000 | 5/1 Secondary reference U.S. Government activity |
| 2640-801 X 2 PIECE 23 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 2640-770X3 PIECE 4, ULTM1000 | 5/1 Secondary reference U.S. Government activity |
| 2640-801X2 PC23T | 5/1 Secondary reference U.S. Government activity |
| 2641-405-01ITEM63 | 5/1 Secondary reference U.S. Government activity |
| 255721PC4 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 7284884 PIECE 43 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4820-01-314-7381 is a Seat,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-314-7381 has 9 manufacturer part numbers on file: 2640-801X2PC23Q3 (Naval Inventory Control Point Mechanicsburg), 845-4687566 ITEM 8Q3 (Naval Inventory Control Point Mechanicsburg), 255721PC4Q3 (Naval Inventory Control Point Mechanicsburg), 7284884 PIECE 43Q3 (Naval Inventory Control Point Mechanicsburg), 2640-801X2 PC23TQ3 (Naval Inventory Control Point Mechanicsburg) and 4 more.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-550-3304. Verify interchangeability with system specifications before substitution.
Key specifications for 2640-801X2PC23Q3: Criticality Code Justification: ZZZY; Special Features: MATERIAL NYLATRON GSVQ; End Item Identification: VALVE,BALL 1/4 INCH BLEED IN; Reference Number Differentiating Characteristics: ITEMS THAT SUPPORT A LEVEL I OR SUBSAFE CRITICAL SYSTEM/COMPONENT THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS AND REQUIRES OBJECTIVE QUALITY EVIDENCE (OQE) TRACEABLE TO PERMANENT MARKING ON THE MATERIAL. 2 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.
NSN 4820-01-314-7381 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.