The Disk,rupturable, cataloged under National Stock Number 4820-01-425-7917, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Evergreen Midwest Co. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-425-7917 |
| Primary Part Number | 6509-72 |
| Item Name | Disk,rupturable |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Evergreen Midwest Co |
| Status | ACTIVE |
| 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 |
|---|---|
| 6509-72 PRIMARY | Evergreen Midwest Co (USA) |
| Reference | Meaning |
|---|---|
| 6509-72 | 3/9 Design control — primary reference Harsco Corp Sherwood Div |
NSN 4820-01-425-7917 is a Disk,rupturable, manufactured by Evergreen Midwest Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-7917 has 1 manufacturer part number on file: 6509-72 (Evergreen Midwest Co).
Key specifications for 6509-72: End Item Identification: SAR/SCBA SYSTEM. 0 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.