The Seat,valve, cataloged under National Stock Number 4820-01-338-5159, 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 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-338-5159 |
| Primary Part Number | 4695555-0001L1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 2.600 INCHES NOMINAL IN |
| Flange Diameter | 25.200 INCHES NOMINAL IN |
| Body Outside Diameter | 20.200 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| Style Designator | PLAIN FLANGED |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Seating Surface Shape | O-RING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 4695555-0001L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 100-4695555 ITEM 1L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 4695555-0001 | 5/1 Secondary reference U.S. Government activity |
| 100-4695555 ITEM 1 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-01-338-5159 is a Seat,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-338-5159 has 2 manufacturer part numbers on file: 4695555-0001L1 (Naval Inventory Control Point Mechanicsburg), 100-4695555 ITEM 1L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 4695555-0001L1: Flange Seat to Disk End Height: 2.600 INCHES NOMINAL IN; Flange Diameter: 25.200 INCHES NOMINAL IN; Body Outside Diameter: 20.200 INCHES NOMINAL IN; Criticality Code Justification: ZZZY. 7 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 4820-01-338-5159 has DEMIL Code B. 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.