The Valve,check, cataloged under National Stock Number 4820-01-030-5139, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corp Div Instrumentation Products Division. Government technical data includes 15 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-030-5139 |
| Primary Part Number | 8Z-C8L-1/3-B |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corp Div Instrumentation Products Division |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Furnished Items and Quantity | 4 FERRULE AND 2 NUT |
| Connection Style | SOCKET (TUBE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 400.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | -15.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM SEAT |
| 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 |
|---|---|
| B-8C-1/3 | South London Valve & Fitting Company Ltd T/a Swagelok London (GBR) |
| 8Z-C8L-1/3-B PRIMARY | Parker-Hannifin Corp Div Instrumentation Products Division (USA) |
| B-8C-1/3 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| 332-2736 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| B-8C-1/3-557 | 5/9 Secondary reference Nupro Co |
| B-8C-1/3 | 5/9 Secondary reference Nupro Co |
| 332-2736-010 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-030-5139 is a Valve,check, manufactured by Parker-Hannifin Corp Div Instrumentation Products Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-030-5139 has 3 manufacturer part numbers on file: B-8C-1/3 (South London Valve & Fitting Company Ltd T/a Swagelok London), 8Z-C8L-1/3-B (Parker-Hannifin Corp Div Instrumentation Products Division), B-8C-1/3 (Swagelok Co).
Key specifications for 8Z-C8L-1/3-B: Flow Control Device: POPPET; Furnished Items and Quantity: 4 FERRULE AND 2 NUT; Connection Style: SOCKET (TUBE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL. 15 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.