The Valve,oxygen Shut Off, cataloged under National Stock Number 4820-01-126-8930, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Avox Systems Inc Dba Avox Systems Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-126-8930 |
| Primary Part Number | 27550-1 |
| Item Name | Valve,oxygen Shut Off |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Avox Systems Inc Dba Avox Systems Inc |
| Status | ACTIVE |
| General Characteristics Item Description | PART OF OXYGEN SYSTEM TUBING INSTALLATION ON THE BOEING COMPANY MODEL B-727 AIRPLANE |
| 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 |
|---|---|
| 27550-1 PRIMARY | Avox Systems Inc Dba Avox Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 10-60733-1 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-126-8930 is a Valve,oxygen Shut Off, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-126-8930 has 1 manufacturer part number on file: 27550-1 (Avox Systems Inc Dba Avox Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 6130-01-733-1256. Verify interchangeability with system specifications before substitution.
Key specifications for 27550-1: General Characteristics Item Description: PART OF OXYGEN SYSTEM TUBING INSTALLATION ON THE BOEING COMPANY MODEL B-727 AIRPLANE. 1 specification is 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.