The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-476-1855, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-476-1855 |
| Primary Part Number | 40403-206 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 8 |
| Flow Control Device | DIAPHRAGM AND DISK |
| Valve Stem Design | SINGLE SEAT |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 11.625 INCHES NOMINAL IN |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 50.0 TO 100.0 CAMERA MOUNT |
| Valve Loading Method | SPRING |
| Specification/standard Data | 81349-MIL-V-2042D GOVERNMENT SPECIFICATION AND 81346-ASTM-1370-92 MANUFACTURERS STANDARD |
| Nondefinitive Spec/std Data | D TYPE AND 92 STYLE |
| First End Connection Type | PLAIN FACE FLANGE |
| Material | NICKEL SEAT |
| Material | NICKEL STEM |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |
| Media for Which Designed | WATER, SALT |
| Maximum Inlet Pressure Rating | ERR-060 |
| 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 |
|---|---|
| 40403-206 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| MIL-V-2042 | 4/1 Identification reference U.S. Government activity |
| ASTM-1370-92 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-476-1855 is a Valve,regulating,fluid Pressure, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-476-1855 has 1 manufacturer part number on file: 40403-206 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-509-3133. Verify interchangeability with system specifications before substitution.
Key specifications for 40403-206: First End Bolt Hole Quantity: 8; Flow Control Device: DIAPHRAGM AND DISK; Valve Stem Design: SINGLE SEAT; Second End Relationship with First End: IDENTICAL. 19 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.