PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2566Valve,safety Relief

Pneudraulics, Inc. · NSN 4820-01-419-5620 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-419-5620 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-419-5620. Primary manufacturer part number: 2566.
Features
  • Valve,safety Relief — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Pneudraulics, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-419-5620, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Pneudraulics, Inc.. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-419-5620
Primary Part Number2566
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerPneudraulics, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-061-1571 INTERCHANGEABLE
Bushing,sleeve
5330-00-082-10452566 INTERCHANGEABLE
Gasket
Rubbercraft Corporation of California, Ltd. Dba Rubbercraft Corp
5330-00-172-67232566 INTERCHANGEABLE
Gasket
Cummins Inc.
5305-00-224-114530155-2-6 INTERCHANGEABLE
Screw,cap,socket Head
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
5915-00-256-1482 INTERCHANGEABLE
Suppressor,parasitic
5325-00-276-6056 INTERCHANGEABLE
Grommet,nonmetallic
6640-00-294-0710 INTERCHANGEABLE
Beaker,laboratory
5120-00-596-10345120-00-596-1034 INTERCHANGEABLE
Adjusting Tool,brake Shoe
Woodings Verona Tool Works Inc
5915-01-038-6201 INTERCHANGEABLE
Filter,low Pass
5950-01-049-82892-566 INTERCHANGEABLE
Reactor
Eldec Aerospace Corp
Cross-Reference Index
Part NumberManufacturer
2566 PRIMARY Pneudraulics, Inc. (USA)
Related Parts
3120-00-061-1571INTERCHANGEABLE
BUSHING,SLEEVE
5330-00-082-1045INTERCHANGEABLE
GASKET
2566
5330-00-172-6723INTERCHANGEABLE
GASKET
2566
5305-00-224-1145INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
30155-2-6
5915-00-256-1482INTERCHANGEABLE
SUPPRESSOR,PARASITIC
5325-00-276-6056INTERCHANGEABLE
GROMMET,NONMETALLIC
6640-00-294-0710INTERCHANGEABLE
BEAKER,LABORATORY
5120-00-596-1034INTERCHANGEABLE
ADJUSTING TOOL,BRAKE SHOE
5120-00-596-1034
5915-01-038-6201INTERCHANGEABLE
FILTER,LOW PASS
5950-01-049-8289INTERCHANGEABLE
REACTOR
2-566
6930-01-095-9792INTERCHANGEABLE
RING,FLANG
2566
3120-01-479-8050INTERCHANGEABLE
BEARING,SLEEVE
2566

Frequently Asked Questions

What is NSN 4820-01-419-5620?

NSN 4820-01-419-5620 is a Valve,safety Relief, manufactured by Pneudraulics, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-419-5620?

NSN 4820-01-419-5620 has 1 cross-referenced part number: 2566 (Pneudraulics, Inc.).

What NSN replaces 4820-01-419-5620?

There are 12 known substitutes for 4820-01-419-5620: 3120-00-061-1571, 5330-00-082-1045, 5330-00-172-6723 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2566?

Key specifications for 2566: End Item Identification: AIRCRAFT,AIRLIFTER C-17A A. 1 total characteristics are documented in the Federal Logistics Information System.

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