The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-421-1602, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-1602 |
| Primary Part Number | 26AC 1/4IN |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | PLAIN |
| Temp Rating | 140.0 FAHRENHEIT NOMINAL DEGF |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 10.0 TO 125.0 CAMERA MOUNT |
| First End Connection Type | THREADED INTERNAL PIPE |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | WATER |
| Maximum Inlet Pressure Rating | ERR-060 |
| Thread Size and Series/type Designator | 1/4-18 NPT FIRST END |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 26AC 1/4IN PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 1/4IN 26AC | C/1 Advisory reference — outside the item-of-supply concept Watts Regulator Company |
NSN 4820-01-421-1602 is a Valve,regulating,fluid Pressure, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-1602 has 1 manufacturer part number on file: 26AC 1/4IN (Watts Regulator Company).
Key specifications for 26AC 1/4IN: First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU; 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.