The Flange,gland,valve, cataloged under National Stock Number 4820-01-443-7517, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-443-7517 |
| Primary Part Number | 6111403-2 |
| Item Name | Flange,gland,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Shape | ROUND |
| Material Document and Classification | ASTM B150, ALLOY C63200 ASSN STD SINGLE MATERIAL RESPONSE |
| Bolt Hole Nominal Diameter | 0.406 INCHES IN |
| Bolt Hole Quantity | 6 |
| Flange Diameter | 4.880 INCHES IN |
| Nominal Center Hole Diameter | 2.006 INCHES IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 581-6405750 AHWA-2 | Naval Sea Systems Command (USA) |
| 6111403-2 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 581-6405750 AHWA FIND 2 | 5/9 Secondary reference Naval Sea Systems Command |
| 6405750 AHWA FI | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 6405750 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-443-7517 is a Flange,gland,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-443-7517 has 2 manufacturer part numbers on file: 581-6405750 AHWA-2 (Naval Sea Systems Command), 6111403-2 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-444-3989. Verify interchangeability with system specifications before substitution.
Key specifications for 6111403-2: Flange Shape: ROUND; Material Document and Classification: ASTM B150, ALLOY C63200 ASSN STD SINGLE MATERIAL RESPONSE; Bolt Hole Nominal Diameter: 0.406 INCHES IN; Bolt Hole Quantity: 6. 7 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.