The Valve,lift-Check, cataloged under National Stock Number 4820-01-425-5791, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bristol Fluid Systems Technologies Ltd. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-425-5791 |
| Primary Part Number | SS58S8 |
| Item Name | Valve,lift-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bristol Fluid Systems Technologies Ltd |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Supplementary Features | FLOW CONTROL DEVICE: PLUG |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Maximum Operating Temp | 482.0 CELSIUS SINGLE RESPONSE DEGC |
| Media for Which Designed | LIQUID SINGLE RESPONSE |
| Material | STEEL COMP 316 BODY |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| SS58S8 | Bristol Fluid Systems Technologies Ltd (GBR) |
| Reference | Meaning |
|---|---|
| SS-58S8 | 3/9 Design control — primary reference Swagelok Co Dba Use CAGE Code 3t9t9 for Cataloging |
| SS-58S8 | 5/9 Secondary reference Nupro Co |
NSN 4820-01-425-5791 is a Valve,lift-Check, manufactured by Bristol Fluid Systems Technologies Ltd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-5791 has 1 manufacturer part number on file: SS58S8 (Bristol Fluid Systems Technologies Ltd).
Key specifications for SS58S8: Connection Style: PLAIN (PIPE) ALL ENDS; Supplementary Features: FLOW CONTROL DEVICE: PLUG; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Operating Pressure: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 10 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.