The Disk,valve, cataloged under National Stock Number 4820-01-245-5254, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-245-5254 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Pressure Rating | 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Outside Diameter | 0.651 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Style Designator | PLUG |
| Material Document and Classification | FED-STD-66 FED STD 1ST MATERIAL RESPONSE OR AISI/SAE 1026 ASSN STD 2ND MATERIAL RESPONSE |
| Seat Angle | 29.0 DEGREES NOMINAL |
| Nominal Thread Size | 0.438 INCHES IN |
| Specification/standard Data | 81346-ASTM-A-182 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION AND 14959-30103 MANUFACTURERS SPECIFICATION AND 14959-B-98327 MANUFACTURERS SPECIFICATION AND 96906-MIL-STD-129 GOVERNMENT STANDARD AND 81349-MIL-I-45208 GOVERNMENT SPECIFICATION AND 96906-MIL-STD-278 GOVERNMENT STANDARD |
| Thread Class | 2B |
| Material | STEEL COMP 1026 |
| Thread Series Designator | UNF |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 30103 PC.3 | 3/1 Design control — primary reference Crane Co Div Valve Div |
NSN 4820-01-245-5254 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-245-5254: Overall Height: 0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN; Pressure Rating: 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Outside Diameter: 0.651 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY. 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.
NSN 4820-01-245-5254 has DEMIL Code F. 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.