The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-435-9058, 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. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-435-9058 |
| Primary Part Number | 815738 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| FSC Application Data | VALVE-RELIEF,OIL PRESSURE STRAINER-OIL |
| Supplementary Features | APPL TO TF33 ENGINE |
| Media for Which Designed | OIL |
| 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 |
|---|---|
| 815738 | Rtx Corporation Div Pratt & Whitney (USA) |
| 815738 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 815738 | 5/9 Secondary reference T M D Machining Inc |
| 815738 | 5/9 Secondary reference Lewis Machine, Llc |
NSN 4820-01-435-9058 is a Valve,relief,pressure and Temper, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-435-9058 has 2 manufacturer part numbers on file: 815738 (Rtx Corporation Div Pratt & Whitney), 815738 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 815738: FSC Application Data: VALVE-RELIEF,OIL PRESSURE STRAINER-OIL; Supplementary Features: APPL TO TF33 ENGINE; Media for Which Designed: OIL. 3 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 4820-01-435-9058 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.