The Valve,check, cataloged under National Stock Number 4820-01-574-8436, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ingersoll-Rand Company Dba Rotary Compressor Division. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Ingersoll-Rand Company Dba Rotary Compressor Division (CAGE 6R484); Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-574-8436 |
| Primary Part Number | 1R39249784 OXYGEN CLEAN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ingersoll-Rand Company Dba Rotary Compressor Division |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 1R39249784 OXYGEN CLEAN | Ingersoll-Rand Company Dba Rotary Compressor Division (USA) |
| 1R39249784CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 793020 ITEM NO 3CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 1R39249784 | 3/1 Design control — primary reference Ingersoll-Rand Company Dba Rotary Compressor Division |
| 793020 ITEM 3 | 5/1 Secondary reference Pacific Consolidated Industries Llc |
NSN 4820-01-574-8436 is a Valve,check, manufactured by Ingersoll-Rand Company Dba Rotary Compressor Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-574-8436 has 3 manufacturer part numbers on file: 1R39249784 OXYGEN CLEAN (Ingersoll-Rand Company Dba Rotary Compressor Division), 1R39249784CP (Naval Inventory Control Point Mechanicsburg), 793020 ITEM NO 3CP (Naval Inventory Control Point Mechanicsburg).
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.