PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6477NValve,angle

Henry Technologies, Inc. · NSN 4820-00-845-0566 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-845-0566 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-845-0566. Primary manufacturer part number: 6477N.
Features
  • Valve,angle — FSC 4820
  • Media for Which Designed: REFRIGERANT 22 SECOND RESPONSE
  • Material: COPPER ALLOY STEM
  • Furnished Items and Quantity: 1 BY-PASS
  • Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS
  • Connection Style: SOCKET (TUBE) ALL ENDS
  • Operating Pressure: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Media for Which Designed: REFRIGERANT 12 FIRST RESPONSE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Stem construction
General Description

The Valve,angle, cataloged under National Stock Number 4820-00-845-0566, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Henry Technologies, Inc.. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-845-0566
Primary Part Number6477N
Item NameValve,angle
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHenry Technologies, Inc.
StatusCANCELLED
Media for Which DesignedREFRIGERANT 22 SECOND RESPONSE
MaterialCOPPER ALLOY STEM
Furnished Items and Quantity1 BY-PASS
Connection TypeUNTHREADED INTERNAL TUBE ALL ENDS
Connection StyleSOCKET (TUBE) ALL ENDS
Operating Pressure500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Media for Which DesignedREFRIGERANT 12 FIRST RESPONSE
Maximum Operating Temp275.0 FAHRENHEIT SINGLE RESPONSE DEGF
Valve Operation MethodMANUAL
MaterialCOPPER ALLOY BODY
MaterialRUBBER SYNTHETIC SEAT
MaterialCOPPER ALLOY FLOW CONTROL DEVICE
Renewable Seat Ring TypePRESSED-IN
Flow Control DeviceDISK
Bonnet Attachment MethodTHREADED
Style DesignatorANGLE
Bonnet TypeINSIDE SCREW
Nominal Outside Diameter Tube Accommodated0.875 INCHES ALL ENDS IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
2530-00-390-321761781R91 INTERCHANGEABLE
Hub Assembly,vehicular
Navistar Intl Corp Truck Br Ohio Plant
4320-00-707-597346472-304 INTERCHANGEABLE
Housing,liquid Pump
The Gorman-Rupp Company Div Gorman-Rupp
1005-01-030-02812502160-2 INTERCHANGEABLE
Slide Assembly
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5962-01-276-3033 INTERCHANGEABLE
Microcircuit,digital
2940-01-424-615946477 INTERCHANGEABLE
Filter Element,intake Air Cleane
Wix Corp
3040-01-441-09226477 INTERCHANGEABLE
Bracket,eye,rotating Shaft
Tech Resources, Inc
5305-01-558-44306477 INTERCHANGEABLE
Screw,machine
Liquid Controls, L.l.c. Div Idex Corporation
Cross-Reference Index
Part NumberManufacturer
6477N Henry Technologies, Inc. (USA)
MIL-DTL-20064 TY3CL1 7/8IN Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
6477 Henry Technologies, Inc. (USA)
SK5058NPC6477N Henry Technologies, Inc. (USA)
MIL-DTL-20064 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
6477N Henry Technologies Limited (GBR)
M20064 TYIII CL1 SIZE 7/8 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
55400S5900-871189ALT4PC6477N Naval Ship Systems Command (USA)
4820PL0991539 Jednolity Indeks Materialowy - Uniform Material Index (POL)
Related Parts
2530-00-390-3217INTERCHANGEABLE
HUB ASSEMBLY,VEHICULAR
61781R91
4320-00-707-5973INTERCHANGEABLE
HOUSING,LIQUID PUMP
46472-304
1005-01-030-0281INTERCHANGEABLE
SLIDE ASSEMBLY
2502160-2
5962-01-276-3033INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
2940-01-424-6159INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
46477
3040-01-441-0922INTERCHANGEABLE
BRACKET,EYE,ROTATING SHAFT
6477
5305-01-558-4430INTERCHANGEABLE
SCREW,MACHINE
6477

Frequently Asked Questions

What is NSN 4820-00-845-0566?

NSN 4820-00-845-0566 is a Valve,angle, manufactured by Henry Technologies, Inc., classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-845-0566?

NSN 4820-00-845-0566 has 9 cross-referenced part numbers: 6477N (Henry Technologies, Inc.), MIL-DTL-20064 TY3CL1 7/8IN (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 6477 (Henry Technologies, Inc.), SK5058NPC6477N (Henry Technologies, Inc.), MIL-DTL-20064 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 4 more.

What NSN replaces 4820-00-845-0566?

There are 7 known substitutes for 4820-00-845-0566: 2530-00-390-3217, 4320-00-707-5973, 1005-01-030-0281 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6477N?

Key specifications for 6477N: Media for Which Designed: REFRIGERANT 22 SECOND RESPONSE; Material: COPPER ALLOY STEM; Furnished Items and Quantity: 1 BY-PASS; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-845-0566 still in active supply?

NSN 4820-00-845-0566 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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