The Disk,valve, cataloged under National Stock Number 4820-01-175-1987, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is General Electric Company. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-175-1987 |
| Primary Part Number | 428B948-005 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Outside Diameter | 4.375 INCHES NOMINAL IN |
| Inside Diameter | 2.000 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 7303E32 PC 47 | General Electric Company (USA) |
| 428B948-005 PRIMARY | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 428B948 | D/9 Drawing number reference only General Electric Company |
| 00428B948-5 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
NSN 4820-01-175-1987 is a Disk,valve, manufactured by General Electric Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-175-1987 has 2 manufacturer part numbers on file: 7303E32 PC 47 (General Electric Company), 428B948-005 (General Electric Company).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-176-2882, 4820-01-176-2883, 4820-01-176-9463. Verify interchangeability with system specifications before substitution.
Key specifications for 428B948-005: Overall Height: 3.812 INCHES NOMINAL IN; Outside Diameter: 4.375 INCHES NOMINAL IN; Inside Diameter: 2.000 INCHES NOMINAL IN; Special Features: ORIFICE DRILL AND REAM O 1.062 IN. NOMINAL 1.250 IN. FROM FLAT END IN. 3 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.