PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

559B-6M-35Valve,safety Relief

Circor Aerospace, Inc. Dba Circor Aerospace Inc · NSN 4820-01-056-3600 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-056-3600 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-056-3600. Primary manufacturer part number: 559B-6M-35.
Features
  • Valve,safety Relief — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Circor Aerospace, Inc. Dba Circor Aerospace Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-056-3600, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 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)
ManufacturersSpx Corporation Dba Dielectric Communications Div Spx Communication Technologies (CAGE 08441); Circor Aerospace, Inc. Dba Circor Aerospace Inc (CAGE 91816)
Technical Specifications
ParameterValue
NSN4820-01-056-3600
Primary Part Number559B-6M-35
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCircor Aerospace, Inc. Dba Circor Aerospace Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5360-00-084-335011779 INTERCHANGEABLE
Spring,helical,compression
Setra Systems, Inc. Dba Gems Sensors
3040-00-110-831411779 INTERCHANGEABLE
Cylinder Assembly,actuating,line
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
4720-00-450-91561503-16 INTERCHANGEABLE
Hose,nonmetallic
Danfoss Power Solutions II, Llc
4820-00-976-0348559B-2M-15 INTERCHANGEABLE
Valve,safety Relief
Circor Aerospace, Inc. Dba Circor Aerospace Inc
5330-01-389-008611779 INTERCHANGEABLE
Gasket
Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco
4720-01-619-361111779 INTERCHANGEABLE
Hose,nonmetallic
Westerbeke Corporation
Cross-Reference Index
Part NumberManufacturer
11779 Spx Corporation Dba Dielectric Communications Div Spx Communication Technologies (USA)
11779-24 Spx Corporation Dba Dielectric Communications Div Spx Communication Technologies (USA)
559B-6M-35 PRIMARY Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
Related Parts
5360-00-084-3350INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
11779
3040-00-110-8314INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
11779
4720-00-450-9156INTERCHANGEABLE
HOSE,NONMETALLIC
1503-16
4820-00-976-0348INTERCHANGEABLE
VALVE,SAFETY RELIEF
559B-2M-15
5330-01-389-0086INTERCHANGEABLE
GASKET
11779
4720-01-619-3611INTERCHANGEABLE
HOSE,NONMETALLIC
11779

Frequently Asked Questions

What is NSN 4820-01-056-3600?

NSN 4820-01-056-3600 is a Valve,safety Relief, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-056-3600?

NSN 4820-01-056-3600 has 3 cross-referenced part numbers: 11779 (Spx Corporation Dba Dielectric Communications Div Spx Communication Technologies), 11779-24 (Spx Corporation Dba Dielectric Communications Div Spx Communication Technologies), 559B-6M-35 (Circor Aerospace, Inc. Dba Circor Aerospace Inc).

What NSN replaces 4820-01-056-3600?

There are 6 known substitutes for 4820-01-056-3600: 5360-00-084-3350, 3040-00-110-8314, 4720-00-450-9156 and 3 more. Verify interchangeability with system specifications before substitution.

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