The Disk,rupturable, cataloged under National Stock Number 4820-01-289-5615, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bs&b Safety Systems Llc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-289-5615 |
| Primary Part Number | 1 IN. TYPE B DISC ASSY UA-2 |
| Item Name | Disk,rupturable |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bs&b Safety Systems Llc |
| Status | ACTIVE |
| Burst Pressure | 72.0 PRESSURE POUNDS PER SQUARE INCH GAGE |
| Cross-Sectional Shape | CONCAVE |
| 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 IN. TYPE B DISC ASSY UA-2 PRIMARY | Bs&b Safety Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| C10045 | 5/9 Secondary reference Hydra Rig Cryogenics Inc |
NSN 4820-01-289-5615 is a Disk,rupturable, manufactured by Bs&b Safety Systems Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-289-5615 has 1 manufacturer part number on file: 1 IN. TYPE B DISC ASSY UA-2 (Bs&b Safety Systems Llc).
Key specifications for 1 IN. TYPE B DISC ASSY UA-2: Burst Pressure: 72.0 PRESSURE POUNDS PER SQUARE INCH GAGE; Cross-Sectional Shape: CONCAVE; Special Features: MATERIALS: THE UNION TYPE SAFETY HEAD IS TO BE OF 300 SERIES STAINLESS STEEL; THE DISC IS TO BE OF ALUMINUM WITH A POLYTETRAFLUOROETHYLENE COATING ON THE ATMOSPHERIC SIDE. 2 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.