The Disk Assembly,valve, cataloged under National Stock Number 4820-01-149-5621, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-149-5621 |
| Item Name | Disk Assembly,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTING OF DISC,RING GASKET RETAINER,GASKET HOLDER,BUMPER,SCREW ROUND HEAD,WASHERS,WASHER LOCK,SCREWS FLAT HEAD |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL FOR LEVEL 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 2640-684X2 PIECE 9T12, 16T19 | 3/1 Design control — primary reference U.S. Government activity |
| 2640-684X2 PIECE 9T12, 16T19L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 845-2180944 PIECE 9T12,16T19L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 845-2180944 PIECE 9T12,16T19 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-149-5621 is a Disk Assembly,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-149-5621: General Characteristics Item Description: CONSISTING OF DISC,RING GASKET RETAINER,GASKET HOLDER,BUMPER,SCREW ROUND HEAD,WASHERS,WASHER LOCK,SCREWS FLAT HEAD; Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL FOR LEVEL 1. 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.
NSN 4820-01-149-5621 has DEMIL Code B. 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.