The Cartridge,safety Relief Valve, cataloged under National Stock Number 4820-01-134-7674, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Thomas Instrument, Incorporated. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-134-7674 |
| Primary Part Number | 3219-044 |
| Item Name | Cartridge,safety Relief Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Thomas Instrument, Incorporated |
| Status | ACTIVE |
| General Characteristics Item Description | CORROSION RESISTING STEEL,SPRING LOADED PLUNGER,RECTANGULAR MTG FLANGE 0.440 IN. W BY 1.231 IN. LG W/TWO 0.203 IN. DIA HOLES SPACED 0.900 IN. C TO C,0.409 IN. BODY DIA,1.865 IN. O/A LG 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 |
|---|---|
| 3219-044 | Thomas Instrument, Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 3219-044 | 5/9 Secondary reference U.S. Government activity |
| 3219-044 | 3/9 Design control — primary reference Woodward Hrt, Inc. Dba Woodward Hrt Inc |
NSN 4820-01-134-7674 is a Cartridge,safety Relief Valve, manufactured by Thomas Instrument, Incorporated, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-134-7674 has 1 manufacturer part number on file: 3219-044 (Thomas Instrument, Incorporated).
Key specifications for 3219-044: General Characteristics Item Description: CORROSION RESISTING STEEL,SPRING LOADED PLUNGER,RECTANGULAR MTG FLANGE 0.440 IN. W BY 1.231 IN. LG W/TWO 0.203 IN. DIA HOLES SPACED 0.900 IN. C TO C,0.409 IN. BODY DIA,1.865 IN. O/A LG IN. 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.