The Disk,rupturable, cataloged under National Stock Number 4820-01-305-3389, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fike Corporation. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-305-3389 |
| Primary Part Number | 1/2 INCH TYPE ST |
| Item Name | Disk,rupturable |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fike Corporation |
| Status | ACTIVE |
| Disk Material | ALUMINUM |
| Burst Pressure | 130.0 PRESSURE POUNDS PER SQUARE INCH GAGE |
| Cross-Sectional Shape | CONCAVE |
| Disk Size | 0.920 INCHES IN |
| 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 |
|---|---|
| 1/2 INCH TYPE ST PRIMARY | Fike Corporation (USA) |
| 1/2 INCH TYPE ST PRIMARY | Larcen Equipment Corp Sub of Larcen D W Co (USA) |
| 6263937 FIND 7 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6263951 | 7/1 Vendor item drawing reference Naval Sea Systems Command |
NSN 4820-01-305-3389 is a Disk,rupturable, manufactured by Fike Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-305-3389 has 3 manufacturer part numbers on file: 1/2 INCH TYPE ST (Fike Corporation), 1/2 INCH TYPE ST (Larcen Equipment Corp Sub of Larcen D W Co), 6263937 FIND 7 (Naval Sea Systems Command).
Key specifications for 1/2 INCH TYPE ST: Disk Material: ALUMINUM; Burst Pressure: 130.0 PRESSURE POUNDS PER SQUARE INCH GAGE; Cross-Sectional Shape: CONCAVE; Special Features: THICKNESS:0.100 IN.NOM IN. 4 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.