The Indicator,valve Opening, cataloged under National Stock Number 4820-01-726-0573, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Boll Filter Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Indicator,valve Opening |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Boll Filter Corporation (CAGE 3EXK7) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-726-0573 |
| Primary Part Number | 550047 |
| Item Name | Indicator,valve Opening |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Boll Filter Corporation |
| 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 |
|---|---|
| 550047 PRIMARY | Boll Filter Corporation (USA) |
| Reference | Meaning |
|---|---|
| 14008118 | D/9 Drawing number reference only Fairbanks Morse, Llc |
NSN 4820-01-726-0573 is a Indicator,valve Opening, manufactured by Boll Filter Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-726-0573 has 1 manufacturer part number on file: 550047 (Boll Filter Corporation).
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.