The Valve,ball, cataloged under National Stock Number 4820-01-346-1657, 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 24 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-346-1657 |
| Primary Part Number | DF330617 ASSEMBLY 97L1 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Furnished Items and Quantity | 2 INDICATOR AND 1 TAILPIECE |
| Nominal Pipe Size Accommodated | 1.000 INCHES ALL ENDS IN |
| Flange Face Design | PLAIN FIRST END |
| Connection Style | PLAIN (TUBE) SECOND END |
| Bolt Circle Nominal Diameter | 3.125 INCHES FIRST END IN |
| Criticality Code Justification | ZZZY |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Connection Type | FLANGE FIRST END |
| Style Designator | ANGLE |
| Material Document and Classification | MIL-C-20159 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | MIL-T-9047 MIL SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Bolt Hole Nominal Diameter | 0.560 INCHES FIRST END IN |
| Maximum Operating Temp | 100.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 4.250 INCHES FIRST END IN |
| Bolt Hole Quantity | 4 FIRST END |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY STEM |
| Material | PLASTIC POLYURETHANE SEAT |
| Material | TITANIUM FLOW CONTROL DEVICE |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.810 INCHES FIRST END IN |
| 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 B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| DF330617 ASSEMBLY 97L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 801-6404588 ASSEMBLY 97L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 14898987L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 211029840L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 801-6404588 ASSEMBLY 97 | 5/1 Secondary reference Naval Sea Systems Command |
| DF330617 ASSEMBLY 97 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 211029840 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 14898987 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4820-01-346-1657 is a Valve,ball, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-346-1657 has 4 manufacturer part numbers on file: DF330617 ASSEMBLY 97L1 (Naval Inventory Control Point Mechanicsburg), 801-6404588 ASSEMBLY 97L1 (Naval Inventory Control Point Mechanicsburg), 14898987L1 (Naval Inventory Control Point Mechanicsburg), 211029840L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for DF330617 ASSEMBLY 97L1: Flange Shape: ROUND WITH HOLES FIRST END; Furnished Items and Quantity: 2 INDICATOR AND 1 TAILPIECE; Nominal Pipe Size Accommodated: 1.000 INCHES ALL ENDS IN; Flange Face Design: PLAIN FIRST END. 24 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 4820-01-346-1657 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.