The Valve,ball, cataloged under National Stock Number 4820-01-245-1573, 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 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-245-1573 |
| Primary Part Number | 256172 ASSY F3L1 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Valve Size | 2.000 INCHES IN |
| Media for Which Designed | OIL SINGLE RESPONSE |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| 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 |
|---|---|
| 256172 ASSY F3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 256172, ASSEMBLY AF-3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 256172 ASSY F3 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 256172, ASSEMBLY AF-3 | 5/1 Secondary reference Fluidyne Corporation Dba Fluidyne Corp |
NSN 4820-01-245-1573 is a Valve,ball, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-245-1573 has 2 manufacturer part numbers on file: 256172 ASSY F3L1 (Naval Inventory Control Point Mechanicsburg), 256172, ASSEMBLY AF-3L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 256172 ASSY F3L1: Criticality Code Justification: ZZZY; Valve Size: 2.000 INCHES IN; Special Features: EQUIP SHALL WITHSTAND SALT FOG TEST PER MIL-STD-810,TEST PROCEDURE 509; Media for Which Designed: OIL SINGLE RESPONSE. 4 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 4820-01-245-1573 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.