PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

15203Valve,safety Relief

Collins Engine Nozzles, Inc · NSN 4820-00-125-5511 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-125-5511 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-125-5511. Primary manufacturer part number: 15203.
Features
  • Valve,safety Relief — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Collins Engine Nozzles, Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-125-5511, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Collins Engine Nozzles, Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameValve,safety Relief
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersCollins Engine Nozzles, Inc (CAGE 71895); Dresser-Rand Holdings, Llc Dba Dresser-Rand Div Olean Operations (CAGE 12570)
Technical Specifications
ParameterValue
NSN4820-00-125-5511
Primary Part Number15203
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCollins Engine Nozzles, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5940-00-089-0141 INTERCHANGEABLE
Terminal,feedthru
5305-00-393-2053 INTERCHANGEABLE
Screw,adjustment
5950-00-431-32169140-0237 INTERCHANGEABLE
Coil,radio Frequency
Keysight Technologies Inc
5342-00-673-78701775826 INTERCHANGEABLE
Bellows,protection
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-01-134-555815203 INTERCHANGEABLE
Nut,plain,single Ball Seat,hexag
Northwestern Tools, Inc.
5962-01-222-5325OP16BZ/883 INTERCHANGEABLE
Microcircuit,linear
Analog Devices, Inc. Div Santa Clara Site
5340-01-383-6019 INTERCHANGEABLE
Catch,clamping
7025-01-610-856515203 INTERCHANGEABLE
Interface Unit,automatic Data Pr
Extreme Networks, Inc
6150-01-663-385915203 INTERCHANGEABLE
Cable Assembly,power,electrical
Hdt Expeditionary Systems Inc
Cross-Reference Index
Part NumberManufacturer
15203 PRIMARY Collins Engine Nozzles, Inc (USA)
395-249-201 Dresser-Rand Holdings, Llc Dba Dresser-Rand Div Olean Operations (USA)
Related Parts
5940-00-089-0141INTERCHANGEABLE
TERMINAL,FEEDTHRU
5305-00-393-2053INTERCHANGEABLE
SCREW,ADJUSTMENT
5950-00-431-3216INTERCHANGEABLE
COIL,RADIO FREQUENCY
9140-0237
5342-00-673-7870INTERCHANGEABLE
BELLOWS,PROTECTION
1775826
5310-01-134-5558INTERCHANGEABLE
NUT,PLAIN,SINGLE BALL SEAT,HEXAG
15203
5962-01-222-5325INTERCHANGEABLE
MICROCIRCUIT,LINEAR
OP16BZ/883
5340-01-383-6019INTERCHANGEABLE
CATCH,CLAMPING
7025-01-610-8565INTERCHANGEABLE
INTERFACE UNIT,AUTOMATIC DATA PR
15203
6150-01-663-3859INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
15203

Frequently Asked Questions

What is NSN 4820-00-125-5511?

NSN 4820-00-125-5511 is a Valve,safety Relief, manufactured by Collins Engine Nozzles, Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-125-5511?

NSN 4820-00-125-5511 has 2 cross-referenced part numbers: 15203 (Collins Engine Nozzles, Inc), 395-249-201 (Dresser-Rand Holdings, Llc Dba Dresser-Rand Div Olean Operations).

What NSN replaces 4820-00-125-5511?

There are 9 known substitutes for 4820-00-125-5511: 5940-00-089-0141, 5305-00-393-2053, 5950-00-431-3216 and 6 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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