The Block,flush, cataloged under National Stock Number 4820-01-246-6421, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-246-6421 |
| Item Name | Block,flush |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 552 558539 | D/9 Drawing number reference only Industrial Electric Wire & Cable, Inc. |
| 552 558539 FTG F-25 | 5/9 Secondary reference Industrial Electric Wire & Cable, Inc. |
| 3189350 | 3/9 Design control — primary reference Allied-Signal Inc Allied-Signal Aerospace Co Bendix West Coast Support Opns |
| 3189350 HD-5 | 5/9 Secondary reference Allied-Signal Inc Allied-Signal Aerospace Co Bendix West Coast Support Opns |
NSN 4820-01-246-6421 is a Block,flush, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-246-6421: General Characteristics Item Description: ALUMINUM. 1 specification is 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.