The Valve,by-Pass, cataloged under National Stock Number 4820-01-216-0909, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tronair, Inc. Div Tronair. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,by-Pass |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Tronair, Inc. Div Tronair (CAGE 59603) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-216-0909 |
| Primary Part Number | 55155 |
| Item Name | Valve,by-Pass |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tronair, Inc. Div Tronair |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 55155 | Tronair, Inc. Div Tronair (USA) |
| Reference | Meaning |
|---|---|
| 55155 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-216-0909 is a Valve,by-Pass, manufactured by Tronair, Inc. Div Tronair, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-216-0909 has 1 manufacturer part number on file: 55155 (Tronair, Inc. Div Tronair).
2 possible matches (shared part number, not a government interchangeability claim): 6105-01-416-7582, 6665-01-617-7288. Verify interchangeability with system specifications before substitution.
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.