The Valve,check, cataloged under National Stock Number 4820-01-537-7724, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-537-7724 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Surface Treatment Document and Classification | AMS2488, TYPE II ASSN STD SINGLE TREATMENT RESPONSE AND MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE |
| Mounting Position | HORIZONTAL |
| Minimum Operating Temp | -54.0 CELSIUS DEGC |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | AMS 4965, 6AL4V ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-S-763, 440C FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 690.0 KILOPASCALS (KPA) MAXIMUM SINGLE RESPONSE |
| Maximum Operating Temp | 135.0 CELSIUS SINGLE RESPONSE DEGC |
| Surface Treatment | ANODIZE AND PASSIVATE |
| Face to Face Distance | 42.0 MILLIMETERS MM |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Material | TITANIUM ALLOY BODY |
| Material | STEEL COMP 440C 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 |
| Reference | Meaning |
|---|---|
| 4M2028 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-537-7724 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-537-7724: Flow Control Device: POPPET; Surface Treatment Document and Classification: AMS2488, TYPE II ASSN STD SINGLE TREATMENT RESPONSE AND MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE; Mounting Position: HORIZONTAL; Minimum Operating Temp: -54.0 CELSIUS DEGC. 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.