The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-072-4529, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mission Systems Orchard Park Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-072-4529 |
| Primary Part Number | 21228-1 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | ACTIVE |
| Second End Relationship with First End | IDENTICAL |
| Body Style | ANGLE |
| Regulation Type | AUTOMATIC DOUBLE STAGE |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| End Connection Quantity | 3 |
| Valve Loading Method | SPRING |
| Surface Treatment | ANODIZE OUTSIDE |
| Material | ALUMINUM ALLOY BODY |
| Media for Which Designed | HYDRAULIC OIL |
| Thread Size and Series/type Designator | 108-14 ANPT FIRST END |
| Filter | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21228-1 PRIMARY | Mission Systems Orchard Park Inc (USA) |
| Reference | Meaning |
|---|---|
| 21228-1 | 5/9 Secondary reference Ingersoll-Rand Company Dba Ingersoll-Rand |
| 8148650 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-00-072-4529 is a Valve,regulating,fluid Pressure, manufactured by Mission Systems Orchard Park Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-072-4529 has 1 manufacturer part number on file: 21228-1 (Mission Systems Orchard Park Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-101-5597, 4820-01-237-0217, 5998-01-560-0563. Verify interchangeability with system specifications before substitution.
Key specifications for 21228-1: Second End Relationship with First End: IDENTICAL; Body Style: ANGLE; Regulation Type: AUTOMATIC DOUBLE STAGE; Third End Relationship with Preceding Ends: IDENTICAL WITH FIRST END. 11 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.
NSN 4820-00-072-4529 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.