The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-006-4643, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-006-4643 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK AND POPPET |
| Second End Relationship with First End | IDENTICAL |
| Body Style | ANGLE |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | PLAIN |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE AND FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 4012 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 4012 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| End Connection Quantity | 2 |
| Valve Loading Method | SPRING |
| First End Connection Type | UNTHREADED EXTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| Material | ALUMINUM AND BRONZE SEAT |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING |
| Material | STEEL COMP 630 AND STEEL COMP 4012 FLOW CONTROL DEVICE |
| Filter | NOT INCLUDED |
| 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 |
|---|---|
| 6532-36 | 3/2 Design control — primary reference U.S. Government activity |
| 6532-36 | 3/9 Design control — primary reference Air Dry Co of America, Llc |
NSN 4820-01-006-4643 is a Valve,regulating,fluid Pressure, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-006-4643: Flow Control Device: DISK AND POPPET; Second End Relationship with First End: IDENTICAL; Body Style: ANGLE; Regulation Type: AUTOMATIC SINGLE STAGE. 14 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.