The Disk,rupturable, cataloged under National Stock Number 4820-01-686-1988, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Oklahoma Safety Equipment Co Inc Dba Oseco Div Oklahoma Safety Equipment Co. (dba Oseco). Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-686-1988 |
| Primary Part Number | PLR03-31 |
| Item Name | Disk,rupturable |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Oklahoma Safety Equipment Co Inc Dba Oseco Div Oklahoma Safety Equipment Co. (dba Oseco) |
| Status | ACTIVE |
| Disk Material | STEEL COMP 316 |
| Burst Pressure | 3.0 PRESSURE POUNDS PER SQUARE INCH GAGE |
| Burst Temperature | 800.0 FAHRENHEIT DEGF |
| Disk Type | REVERSE BUCKLING |
| Disk Size | 3.0 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 |
|---|---|
| PLR03-31 PRIMARY | Oklahoma Safety Equipment Co Inc Dba Oseco Div Oklahoma Safety Equipment Co. (dba Oseco) (USA) |
| R03-111-021021 ITEM 5 | Oklahoma Safety Equipment Co Inc Dba Oseco Div Oklahoma Safety Equipment Co. (dba Oseco) (USA) |
| 3233620 | Bae Systems Australia Defence Pty Ltd (AUS) |
NSN 4820-01-686-1988 is a Disk,rupturable, manufactured by Oklahoma Safety Equipment Co Inc Dba Oseco Div Oklahoma Safety Equipment Co. (dba Oseco), classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-686-1988 has 3 manufacturer part numbers on file: PLR03-31 (Oklahoma Safety Equipment Co Inc Dba Oseco Div Oklahoma Safety Equipment Co. (dba Oseco)), R03-111-021021 ITEM 5 (Oklahoma Safety Equipment Co Inc Dba Oseco Div Oklahoma Safety Equipment Co. (dba Oseco)), 3233620 (Bae Systems Australia Defence Pty Ltd).
Key specifications for PLR03-31: Disk Material: STEEL COMP 316; Burst Pressure: 3.0 PRESSURE POUNDS PER SQUARE INCH GAGE; Burst Temperature: 800.0 FAHRENHEIT DEGF; Disk Type: REVERSE BUCKLING. 5 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.