The Disk,rupturable, cataloged under National Stock Number 4820-00-948-3511, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fike Corporation. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4820-00-948-3511 |
| Primary Part Number | D688 |
| Item Name | Disk,rupturable |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fike Corporation |
| Status | ACTIVE |
| Disk Material | NICKEL |
| Burst Pressure | 25.0 PRESSURE POUNDS PER SQUARE INCH GAGE |
| Cross-Sectional Shape | CONCAVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 64A92C785 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 64A92C785 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 3IN250PSI | Fike Corporation (USA) |
| D688 PRIMARY | Fike Corporation (USA) |
NSN 4820-00-948-3511 is a Disk,rupturable, manufactured by Fike Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-948-3511 has 4 manufacturer part numbers on file: 64A92C785 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 64A92C785 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 3IN250PSI (Fike Corporation), D688 (Fike Corporation).
1 possible match (shared part number, not a government interchangeability claim): 3460-01-573-7341. Verify interchangeability with system specifications before substitution.
Key specifications for D688: Disk Material: NICKEL; Burst Pressure: 25.0 PRESSURE POUNDS PER SQUARE INCH GAGE; Cross-Sectional Shape: CONCAVE. 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.
NSN 4820-00-948-3511 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.