The Valve Assembly,manifold, cataloged under National Stock Number 4820-01-175-1901, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-175-1901 |
| Primary Part Number | 4057681 |
| Item Name | Valve Assembly,manifold |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 4057681 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 4820PL0656205 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-175-1901 is a Valve Assembly,manifold, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-175-1901 has 1 manufacturer part number on file: 4057681 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4057681: Special Features: RETAINER 1 P/N 4004530,VALVE BREATHER PRESSURE 1 P/N 4052945,SEAT-HELICAL COMPRESSION SPRING 1 P/N 4052946,HOUSING-BREATHER PRESSURE VALVE 1 P/N 4057683,BELLOWS-BREATHER PRESSURE VALVE 1 P/N 695031; Part Name Assigned by Controlling Agency: VALVE,BREATHER PRESSURIZING; End Item Identification: JET ENGINE MODEL NOS F100-PW-100 AND F100-PW-200 INCORPORATING E/C A83-47. 0 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 4820-01-175-1901 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.