The Valve,pilot Operati, cataloged under National Stock Number 4820-01-228-2829, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-228-2829 |
| Primary Part Number | 21989N |
| Item Name | Valve,pilot Operati |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| General Characteristics Item Description | 2.50 IPS; 150 PSI; FLANGE MOUNTED |
| 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 |
|---|---|
| 21989N PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| 3G5A2SL 2 1/2 INAND 29177N | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| DDLNS-2X 3G5A2SL2 1/2 IN | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| 21989N(2.50IPS) | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| Y101554022 | 5/1 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-228-2829 is a Valve,pilot Operati, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-228-2829 has 4 manufacturer part numbers on file: 21989N (Leslie Controls, Inc. Dba Leslie Controls Inc), 3G5A2SL 2 1/2 INAND 29177N (Leslie Controls, Inc. Dba Leslie Controls Inc), DDLNS-2X 3G5A2SL2 1/2 IN (Leslie Controls, Inc. Dba Leslie Controls Inc), 21989N(2.50IPS) (Leslie Controls, Inc. Dba Leslie Controls Inc).
4 possible matches (shared part number, not a government interchangeability claim): 4810-01-484-3598, 4820-01-495-5565, 4820-01-495-5572. Verify interchangeability with system specifications before substitution.
Key specifications for 21989N: General Characteristics Item Description: 2.50 IPS; 150 PSI; FLANGE MOUNTED. 1 specification is 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.