The Disk,valve, cataloged under National Stock Number 4820-00-177-1880, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Falls Filtration Technologies, Inc.. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-177-1880 |
| Primary Part Number | CD0511500-170 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Falls Filtration Technologies, Inc. |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 3.281 INCHES NOMINAL IN |
| Flange Diameter | 1.312 INCHES NOMINAL 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 |
|---|---|
| CD0511500-170 PRIMARY | Falls Filtration Technologies, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3211452R1 | 3/2 Design control — primary reference U.S. Government activity |
| CS-4310-0016 | D/9 Drawing number reference only Falls Filtration Technologies, Inc. |
NSN 4820-00-177-1880 is a Disk,valve, manufactured by Falls Filtration Technologies, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-177-1880 has 1 manufacturer part number on file: CD0511500-170 (Falls Filtration Technologies, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4810-00-212-9979. Verify interchangeability with system specifications before substitution.
Key specifications for CD0511500-170: Flange Seat to Disk End Height: 3.281 INCHES NOMINAL IN; Flange Diameter: 1.312 INCHES NOMINAL IN; Material: COPPER ALLOY. 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.
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.