The Valve,check, cataloged under National Stock Number 4820-01-581-1068, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Warren Alloy Valve and Fitting Co Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-581-1068 |
| Primary Part Number | 803HF/.50IN/SW |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Warren Alloy Valve and Fitting Co Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM A182-F316L FORGED ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Disk Loading Method | WEIGHT |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | STEEL COMP 316 BODY |
| Material | STEEL COMP 316 FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 803HF/.50IN/SW PRIMARY | Warren Alloy Valve and Fitting Co Inc (USA) |
| SP-W4820015811068 | Warren Alloy Valve and Fitting Co Inc (USA) |
| 1/2 800# 316L BC SWNG CHK VLV | Warren Alloy Valve and Fitting Co Inc (USA) |
NSN 4820-01-581-1068 is a Valve,check, manufactured by Warren Alloy Valve and Fitting Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-581-1068 has 3 manufacturer part numbers on file: 803HF/.50IN/SW (Warren Alloy Valve and Fitting Co Inc), SP-W4820015811068 (Warren Alloy Valve and Fitting Co Inc), 1/2 800# 316L BC SWNG CHK VLV (Warren Alloy Valve and Fitting Co Inc).
Key specifications for 803HF/.50IN/SW: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS. 13 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.