The Disk,valve, cataloged under National Stock Number 4820-01-540-1457, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Nibco. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-540-1457 |
| Primary Part Number | R0154A4 ASBLY |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Nibco |
| Status | ACTIVE |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 366.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | TFE MFR REF SINGLE MATERIAL RESPONSE |
| Media for Which Designed | STEAM |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE |
| 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 |
|---|---|
| R0154A4 ASBLY PRIMARY | Nibco (USA) |
| Reference | Meaning |
|---|---|
| S-235-Y PT 11, 12, 13 1.00IN | 5/9 Secondary reference Nibco Inc |
| R0154A4 ASBLY | 3/9 Design control — primary reference Nibco Inc |
NSN 4820-01-540-1457 is a Disk,valve, manufactured by Nibco, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-540-1457 has 1 manufacturer part number on file: R0154A4 ASBLY (Nibco).
Key specifications for R0154A4 ASBLY: Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: 366.0 FAHRENHEIT MAXIMUM DEGF; Material Document and Classification: TFE MFR REF SINGLE MATERIAL RESPONSE; Special Features: THIS IS AN ASSEMBLY OF DISK, DISK HOLDER, MATERIAL BRONZE ASTM B62, AND DISK NUT, MATERIAL BRONZE ASTM B62/ASTM B98, ALLOY C65100 WITH STAINLESS STEEL WASHER; NEXT HIGHER ASSEMBLY S-235-Y 1 IN, 4820-01-426-7763 IN. 5 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.