The Valve,ball, cataloged under National Stock Number 4820-01-437-3337, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-437-3337 |
| Primary Part Number | 803-5001003-A621 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 1.250 INCHES ALL ENDS IN |
| Connection Style | BEVELED (PIPE) ALL ENDS |
| Connection Type | BUTT WELD PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | MIL-T-9047, COMP 6AL-4V MIL SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE V |
| Material Document and Classification | QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM B271, ALLOY C92200 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B505, ALLOY C92200 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B584, ALLOY C92200 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | COPPER ALLOY 922 BODY |
| Material | NICKEL ALLOY 400 STEM |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Material | TITANIUM ALLOY FLOW CONTROL DEVICE |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 803-5001003-A621 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5001003 | D/9 Drawing number reference only Naval Sea Systems Command |
| 803-5001003 A62 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 5001003 ASSY A6 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4820-01-437-3337 is a Valve,ball, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-437-3337 has 1 manufacturer part number on file: 803-5001003-A621 (Naval Sea Systems Command).
Key specifications for 803-5001003-A621: Nominal Pipe Size Accommodated: 1.250 INCHES ALL ENDS IN; Connection Style: BEVELED (PIPE) ALL ENDS; Connection Type: BUTT WELD PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 13 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.