PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-V-1187Valve,angle

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4820-00-266-9488 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-266-9488 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-266-9488. Primary manufacturer part number: MIL-V-1187.
Features
  • Valve,angle — FSC 4820
  • Valve Operation Method: MANUAL
  • Thread Series Designator: NPT ALL ENDS
  • Bonnet Type: INSIDE SCREW
  • Connection Type: THREADED INTERNAL PIPE ALL ENDS
  • Material: COPPER ALLOY OR NICKEL ALLOY SEAT
  • Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS
  • Flow Control Device: DISK
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy or Nickel Alloy Seat construction
General Description

The Valve,angle, cataloged under National Stock Number 4820-00-266-9488, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 26 verified specifications, sourced from the Federal Logistics Information System (FLIS). 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
NSN4820-00-266-9488
Primary Part NumberMIL-V-1187
Item NameValve,angle
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Valve Operation MethodMANUAL
Thread Series DesignatorNPT ALL ENDS
Bonnet TypeINSIDE SCREW
Connection TypeTHREADED INTERNAL PIPE ALL ENDS
MaterialCOPPER ALLOY OR NICKEL ALLOY SEAT
Connection StylePLAIN,OPTIONAL END(PIPE) ALL ENDS
Flow Control DeviceDISK
Media for Which DesignedSTEAM FIRST RESPONSE
MaterialNICKEL ALLOY 400 FLOW CONTROL DEVICE
Maximum Operating Temp425.0 FAHRENHEIT SINGLE RESPONSE DEGF
Media for Which DesignedWATER-OIL-GAS SECOND RESPONSE
Nominal Thread Size0.125 INCHES ALL ENDS IN
Departure From Cited DocumentAS MODIFIED BY TYPE OF DISK
Nondefinitive Spec/std Data1 TYPE AND 1/8 SIZE
Departure From Cited DesignatorAS MODIFIEDBY VALVE SIZE
Operating Pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Material Document and ClassificationB164-61 ASSN STD SINGLE MATERIAL RESPONSE STEM
MaterialNICKEL ALLOY 400 STEM
Material Document and ClassificationB164-61 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
Material Document and ClassificationQQ-C-390,ALLOY D4/D FED SPEC SINGLE MATERIAL RESPONSE BODY
Features ProvidedBONNET PACKING
Renewable Seat Ring TypeTHREADED
Thread DirectionRIGHT-HAND ALL ENDS
Bonnet Attachment MethodUNION
MaterialCOPPER ALLOY 922 BODY
Style DesignatorANGLE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-276-8953 INTERCHANGEABLE
Valve,angle
4820-00-541-036155 INTERCHANGEABLE
Valve,angle
Precision Speed Manufacturing, Llc
4820-00-541-0362 INTERCHANGEABLE
Valve,angle
4820-00-541-0363MSS SP-80 TYP3,CL 300,SZ 1/4IN INTERCHANGEABLE
Valve,globe
Manufacturers Standardization Society of the Valve and Fittings Industry Inc
4820-00-541-0366TY1,CL300,SZ1.5IN INTERCHANGEABLE
Valve,angle
Manufacturers Standardization Society of the Valve and Fittings Industry Inc
4820-00-541-0367 INTERCHANGEABLE
Valve,angle
4820-00-541-0368 INTERCHANGEABLE
Valve,angle
4820-00-541-0369 INTERCHANGEABLE
Valve,globe
4820-00-541-0370 INTERCHANGEABLE
Valve,globe
4820-00-541-0371TYPE 1/CLASS 300/SIZE 3/4 IN. INTERCHANGEABLE
Valve,globe
Manufacturers Standardization Society of the Valve and Fittings Industry Inc
Cross-Reference Index
Part NumberManufacturer
MIL-V-1187 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4820-00-276-8953INTERCHANGEABLE
VALVE,ANGLE
4820-00-541-0361INTERCHANGEABLE
VALVE,ANGLE
55
4820-00-541-0362INTERCHANGEABLE
VALVE,ANGLE
4820-00-541-0363INTERCHANGEABLE
VALVE,GLOBE
MSS SP-80 TYP3,CL 300,SZ 1/4IN
4820-00-541-0366INTERCHANGEABLE
VALVE,ANGLE
TY1,CL300,SZ1.5IN
4820-00-541-0367INTERCHANGEABLE
VALVE,ANGLE
4820-00-541-0368INTERCHANGEABLE
VALVE,ANGLE
4820-00-541-0369INTERCHANGEABLE
VALVE,GLOBE
4820-00-541-0370INTERCHANGEABLE
VALVE,GLOBE
4820-00-541-0371INTERCHANGEABLE
VALVE,GLOBE
TYPE 1/CLASS 300/SIZE 3/4 IN.
4820-00-541-0372INTERCHANGEABLE
VALVE,GLOBE
4820-00-541-0373INTERCHANGEABLE
VALVE,GLOBE

Frequently Asked Questions

What is NSN 4820-00-266-9488?

NSN 4820-00-266-9488 is a Valve,angle, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-266-9488?

NSN 4820-00-266-9488 has 1 cross-referenced part number: MIL-V-1187 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4820-00-266-9488?

There are 12 known substitutes for 4820-00-266-9488: 4820-00-276-8953, 4820-00-541-0361, 4820-00-541-0362 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-V-1187?

Key specifications for MIL-V-1187: Valve Operation Method: MANUAL; Thread Series Designator: NPT ALL ENDS; Bonnet Type: INSIDE SCREW; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 26 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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