PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WWB51Valve,angle

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 4820-00-274-3560 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-274-3560 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-274-3560. Primary manufacturer part number: WWB51.
Features
  • Valve,angle — FSC 4820
  • Valve Operation Method: MANUAL
  • Thread Direction: RIGHT-HAND ALL ENDS
  • Thread Series Designator: NPT ALL ENDS
  • Nominal Thread Size: 1.000 INCHES ALL ENDS IN
  • Bonnet Attachment Method: UNION
  • Maximum Operating Temp: 366.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Flow Control Device: DISK
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Overall construction
General Description

The Valve,angle, cataloged under National Stock Number 4820-00-274-3560, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-274-3560
Primary Part NumberWWB51
Item NameValve,angle
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Valve Operation MethodMANUAL
Thread DirectionRIGHT-HAND ALL ENDS
Thread Series DesignatorNPT ALL ENDS
Nominal Thread Size1.000 INCHES ALL ENDS IN
Bonnet Attachment MethodUNION
Maximum Operating Temp366.0 FAHRENHEIT SINGLE RESPONSE DEGF
Flow Control DeviceDISK
Features ProvidedBONNET PACKING
Specification/standard Data59656-MSS SP-80 MANUFACTURERS STANDARD
Nondefinitive Spec/std Data150PSI CLASS AND 3 TYPE AND A END AND 1 SIZE
Connection StylePLAIN,OPTIONAL END(PIPE) ALL ENDS
Bonnet TypeINSIDE SCREW
Operating Pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MaterialCOPPER ALLOY OVERALL
Connection TypeTHREADED INTERNAL PIPE ALL ENDS
Media for Which DesignedSTEAM SINGLE RESPONSE
Thread Quantity Per Inch11-1/2 ALL ENDS
Style DesignatorANGLE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4820-00-227-0168045 1-4 INTERCHANGEABLE
Valve,globe
Fairbanks Co the
4820-00-262-6876 INTERCHANGEABLE
Valve,globe
4820-00-262-6877 INTERCHANGEABLE
Valve,globe
4820-00-262-6884 INTERCHANGEABLE
Valve,globe
4820-00-262-6885 INTERCHANGEABLE
Valve,globe
4820-00-274-3556 INTERCHANGEABLE
Valve,angle
4820-00-274-3558 INTERCHANGEABLE
Valve,angle
4820-00-274-3562 INTERCHANGEABLE
Valve,angle
4820-00-274-3563 INTERCHANGEABLE
Valve,angle
4820-00-274-3564 INTERCHANGEABLE
Valve,angle
Cross-Reference Index
Part NumberManufacturer
WWB51 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
MILV1202 Samuel Levine Plumbing and Heating Supplies, Inc. Div Slphs Inc (USA)
MILV1202 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILV1202 Main Line Supply Co. Inc. (USA)
MSS SP-80 Manufacturers Standardization Society of the Valve and Fittings Industry Inc (USA)
Related Parts
4820-00-227-0168INTERCHANGEABLE
VALVE,GLOBE
045 1-4
4820-00-262-6876INTERCHANGEABLE
VALVE,GLOBE
4820-00-262-6877INTERCHANGEABLE
VALVE,GLOBE
4820-00-262-6884INTERCHANGEABLE
VALVE,GLOBE
4820-00-262-6885INTERCHANGEABLE
VALVE,GLOBE
4820-00-274-3556INTERCHANGEABLE
VALVE,ANGLE
4820-00-274-3558INTERCHANGEABLE
VALVE,ANGLE
4820-00-274-3562INTERCHANGEABLE
VALVE,ANGLE
4820-00-274-3563INTERCHANGEABLE
VALVE,ANGLE
4820-00-274-3564INTERCHANGEABLE
VALVE,ANGLE
4820-00-274-3565INTERCHANGEABLE
VALVE,ANGLE
4820-00-274-3567INTERCHANGEABLE
VALVE,ANGLE

Frequently Asked Questions

What is NSN 4820-00-274-3560?

NSN 4820-00-274-3560 is a Valve,angle, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-274-3560?

NSN 4820-00-274-3560 has 5 cross-referenced part numbers: WWB51 (Federal Specifications Promulgated by General Services Administration Washington DC), MILV1202 (Samuel Levine Plumbing and Heating Supplies, Inc. Div Slphs Inc), MILV1202 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILV1202 (Main Line Supply Co. Inc.), MSS SP-80 (Manufacturers Standardization Society of the Valve and Fittings Industry Inc).

What NSN replaces 4820-00-274-3560?

There are 12 known substitutes for 4820-00-274-3560: 4820-00-227-0168, 4820-00-262-6876, 4820-00-262-6877 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WWB51?

Key specifications for WWB51: Valve Operation Method: MANUAL; Thread Direction: RIGHT-HAND ALL ENDS; Thread Series Designator: NPT ALL ENDS; Nominal Thread Size: 1.000 INCHES ALL ENDS IN. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-274-3560 still in active supply?

NSN 4820-00-274-3560 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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