The Disk,valve, cataloged under National Stock Number 4820-01-341-4451, 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 9 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-341-4451 |
| Primary Part Number | 159673L1 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Pressure Rating | 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 28.0 FAHRENHEIT MINIMUM AND 165.0 FAHRENHEIT MAXIMUM DEGF |
| Outside Diameter | 0.458 INCHES MINIMUM AND 0.459 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Style Designator | POPPET |
| Material Document and Classification | QQ-N-281, CLASS A FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-281, CLASS B FED SPEC 2ND MATERIAL RESPONSE |
| Media for Which Designed | AIR OR GAS |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 159673L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 280977 ITEM 17L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 195767L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 280977-0005 ITEM17L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 280977-0005-ITEM NO-17L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 280977-0005-ITEM NO-17 | 5/1 Secondary reference U.S. Government activity |
| 159673 | 5/9 Secondary reference U.S. Government activity |
| 280977-0005 ITEM17 | 5/1 Secondary reference U.S. Government activity |
| 280977 ITEM 17 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-01-341-4451 is a Disk,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-341-4451 has 5 manufacturer part numbers on file: 159673L1 (Naval Inventory Control Point Mechanicsburg), 280977 ITEM 17L1 (Naval Inventory Control Point Mechanicsburg), 195767L1 (Naval Inventory Control Point Mechanicsburg), 280977-0005 ITEM17L1 (Naval Inventory Control Point Mechanicsburg), 280977-0005-ITEM NO-17L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 159673L1: Pressure Rating: 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: 28.0 FAHRENHEIT MINIMUM AND 165.0 FAHRENHEIT MAXIMUM DEGF; Outside Diameter: 0.458 INCHES MINIMUM AND 0.459 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY. 9 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.