The Valve,ball, cataloged under National Stock Number 4820-01-272-7537, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-272-7537 |
| Primary Part Number | 803-5001003-S921 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 2.500 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 | QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE PACKING |
| Material | NICKEL ALLOY STEM |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| 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-S921 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-5001003 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-272-7537 is a Valve,ball, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-272-7537 has 1 manufacturer part number on file: 803-5001003-S921 (Naval Sea Systems Command).
Key specifications for 803-5001003-S921: Nominal Pipe Size Accommodated: 2.500 INCHES ALL ENDS IN; Connection Style: BEVELED (PIPE) ALL ENDS; Connection Type: BUTT WELD PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 12 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.