The Disk,valve, cataloged under National Stock Number 4820-01-537-1537, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flowserve Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-537-1537 |
| Primary Part Number | 32410 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flowserve Inc |
| Status | ACTIVE |
| Specification/standard Data | 81346 - ASTM A479 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 410 TYPE |
| 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 |
|---|---|
| 59439-2,R 01 ITEM 9 | Flowserve Inc (USA) |
| 32410 PRIMARY | Flowserve Inc (USA) |
| Reference | Meaning |
|---|---|
| 59439-2 | D/9 Drawing number reference only Flowserve Inc |
NSN 4820-01-537-1537 is a Disk,valve, manufactured by Flowserve Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-537-1537 has 2 manufacturer part numbers on file: 59439-2,R 01 ITEM 9 (Flowserve Inc), 32410 (Flowserve Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6220-01-588-4264, 5430-01-649-6021. Verify interchangeability with system specifications before substitution.
Key specifications for 32410: Specification/standard Data: 81346 - ASTM A479 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Nondefinitive Spec/std Data: 410 TYPE; Part Name Assigned by Controlling Agency: SWING CHECK; End Item Identification: VALVE, SWING CHECK 1.50IN; 4820-01-537-1532 IN. 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.