The Disk,valve, cataloged under National Stock Number 4820-00-630-4541, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Automatic Switch Company Dba Asco. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-630-4541 |
| Primary Part Number | FV38-611 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Automatic Switch Company Dba Asco |
| Status | ACTIVE |
| Shank Diameter | 0.375 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 1.300 INCHES NOMINAL IN |
| Outside Diameter | 2.090 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Tip Diameter | 2.090 INCHES NOMINAL IN |
| Seat Angle | 30.0 DEGREES NOMINAL |
| Under Flange Height | 2.880 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| GV55-060PC35 | Automatic Switch Company Dba Asco (USA) |
| FV38-611 PRIMARY | Automatic Switch Company Dba Asco (USA) |
| Reference | Meaning |
|---|---|
| AV55-056PC35 | 5/9 Secondary reference Automatic Switch Company Dba Asco |
| 580-204-1416437PC35 | 5/2 Secondary reference U.S. Government activity |
| FV38-611PCALL | 5/9 Secondary reference Automatic Switch Company Dba Asco |
NSN 4820-00-630-4541 is a Disk,valve, manufactured by Automatic Switch Company Dba Asco, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-630-4541 has 2 manufacturer part numbers on file: GV55-060PC35 (Automatic Switch Company Dba Asco), FV38-611 (Automatic Switch Company Dba Asco).
Key specifications for FV38-611: Shank Diameter: 0.375 INCHES NOMINAL IN; Flange Seat to Disk End Height: 1.300 INCHES NOMINAL IN; Overall Height: 4.440 INCHES NOMINAL IN; Outside Diameter: 2.090 INCHES NOMINAL IN. 8 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.