NSN 4820-01-425-1637 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-425-1637. Manufacturer of record part number: RD17515-4.
Also searched as4820-01-425-1637 ·
4820014251637 ·
NIIN 014251637 ·
01-425-1637 ·
FSC 4820 Valves, Nonpowered · CAGE 51663 · RD17515-4
Manufacturer of record: Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec
Identification
NSN: 4820-01-425-1637
NIIN: 014251637
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: RD17515-4
Manufacturer: Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-425-1637, 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 5 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.
Technical Specifications
Parameter
Value
NSN
4820-01-425-1637
Primary Part Number
RD17515-4
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec
Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec (USA)
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-425-1637?
NSN 4820-01-425-1637 is a Valve,safety Relief, manufactured by Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-425-1637?
NSN 4820-01-425-1637 has 1 manufacturer part number on file: RD17515-4 (Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec).
What are the specifications of RD17515-4?
Key specifications for RD17515-4: Flow Control Device: POPPET; Connection Type: THREADED CARTRIDGE ALL ENDS; Style Designator: SCREW-IN CARTRIDGE; Disk Loading Method: SPRING. 5 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-425-1637 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.