The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-00-347-8555, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-347-8555 |
| Primary Part Number | RB15645 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec |
| Status | ACTIVE |
| Flow Control Device | PISTON, WEIGHTED TYPE |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-A-351, TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| End Connection Quantity | 2 |
| Second End Style Designator | PLAIN BEVELED |
| First End Connection Type | UNTHREADED EXTERNAL TUBE |
| Material | STEEL BODY |
| Material | ALUMINUM ALLOY 2017 SEAT |
| Media for Which Designed | AIR |
| Second End Connection Type | UNTHREADED EXTERNAL TUBE |
| 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 |
|---|---|
| RB15645 PRIMARY | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec (USA) |
NSN 4820-00-347-8555 is a Valve,relief,pressure and Temper, manufactured by Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-347-8555 has 1 manufacturer part number on file: RB15645 (Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec).
Key specifications for RB15645: Flow Control Device: PISTON, WEIGHTED TYPE; Second End Relationship with First End: NOT IDENTICAL; Body Style: STRAIGHT THRU; First End Style Designator: PLAIN. 13 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.