The Cartridge,dehydrator, cataloged under National Stock Number 4440-01-582-6344, is classified within Federal Supply Class 4440 (Driers, Dehydrators, and Anhydrators) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Compass Instruments Inc Dba Compass Instruments Inc Div Compass Instruments. Government technical data includes 4 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4440-01-582-6344 |
| Primary Part Number | 657-400-001 |
| Item Name | Cartridge,dehydrator |
| FSC / FSG | 4440 / 44 — Driers, Dehydrators, and Anhydrators |
| Manufacturer | Compass Instruments Inc Dba Compass Instruments Inc Div Compass Instruments |
| Status | ACTIVE |
| Body Overall Length | 11.375 INCHES NOMINAL IN |
| Desiccant Type | CALCIUM SULPHATE |
| Material | PLASTIC BODY |
| Body Overall Diameter | 2.625 INCHES NOMINAL 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 |
|---|---|
| 657-400-001 PRIMARY | Compass Instruments Inc Dba Compass Instruments Inc Div Compass Instruments (USA) |
NSN 4440-01-582-6344 is a Cartridge,dehydrator, manufactured by Compass Instruments Inc Dba Compass Instruments Inc Div Compass Instruments, classified under FSC 4440, Driers, Dehydrators, and Anhydrators. Status: active.
NSN 4440-01-582-6344 has 1 manufacturer part number on file: 657-400-001 (Compass Instruments Inc Dba Compass Instruments Inc Div Compass Instruments).
Key specifications for 657-400-001: Body Overall Length: 11.375 INCHES NOMINAL IN; Desiccant Type: CALCIUM SULPHATE; Special Features: COLUMN IS MOLDED POLYCARBONATE, DESICCANT SUPPORT AND COIL SPRINGS ARE STAINLESS STEEL, POLYCARBONATE CAP IS FITTED WITH O-RING GASKET. DRIERITE IS HELP FIRMLY IN PLACE BETWEEN FILT FILTERS. MAX WORKING PRESSURE 90 PSIG, CONNECTIONS HOSE BARGS FOR FLEXIBLE TUBING (1/4 IN - 38 IN I.D.) 1/8 IN SS; DESICCANT 1/14 LB 8 MESH INDICATING DRIERITE; WATER CAPACITY 50 GRAMSL RECOMMENDED FLOW RATE 200 LITERS PER HOUR OR 0.1 SCFM FOR MAX EFFICIENCY LBS; Part Name Assigned by Controlling Agency: DRIERITE LABRATORY GAS DRYING UNIT WITH HOSE BARBS. 4 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.