PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

101188 11/4INCHValve,check

Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc · NSN 4820-01-459-9331 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-459-9331 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-459-9331. Primary manufacturer part number: 101188 11/4INCH.
Features
  • Valve,check — FSC 4820
  • Mounting Position: HORIZONTAL OR VERTICAL
  • Style Designator: STRAIGHT THRU FLANGED ENDS
  • Valve Operation Method: AUTOMATIC
  • Valve Size: 1.250 INCHES IN
  • 3 verified cross-references
  • Primary manufacturer: Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,check, cataloged under National Stock Number 4820-01-459-9331, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-459-9331
Primary Part Number101188 11/4INCH
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMilwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
StatusACTIVE
Mounting PositionHORIZONTAL OR VERTICAL
Style DesignatorSTRAIGHT THRU FLANGED ENDS
Valve Operation MethodAUTOMATIC
Valve Size1.250 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4820-00-203-76755021BM0150 INTERCHANGEABLE
Valve,check
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
5998-00-236-3280101188 INTERCHANGEABLE
Circuit Card Assembly
Aimtron Systems, Llc
2915-00-433-8992102316 INTERCHANGEABLE
Housing,fuel Control
Triumph Engine Control Systems Llc
5970-00-628-7701 INTERCHANGEABLE
Insulator,bushing
4320-01-112-6320923087 INTERCHANGEABLE
Parts Kit,rotary Pump
Eaton Aerospace, Llc Dba Jackson South
5305-01-150-1191101188 INTERCHANGEABLE
Screw,machine
Astra Associates Inc
7690-01-673-0792101188 INTERCHANGEABLE
Decal
Equipment Distributors, Inc. Dba Equipment Distributors Inc
Cross-Reference Index
Part NumberManufacturer
101188 1 1/4INC Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
101188 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
101188 11/4INCH PRIMARY Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
Related Parts
4820-00-203-7675INTERCHANGEABLE
VALVE,CHECK
5021BM0150
5998-00-236-3280INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
101188
2915-00-433-8992INTERCHANGEABLE
HOUSING,FUEL CONTROL
102316
5970-00-628-7701INTERCHANGEABLE
INSULATOR,BUSHING
4320-01-112-6320INTERCHANGEABLE
PARTS KIT,ROTARY PUMP
923087
5305-01-150-1191INTERCHANGEABLE
SCREW,MACHINE
101188
7690-01-673-0792INTERCHANGEABLE
DECAL
101188

Frequently Asked Questions

What is NSN 4820-01-459-9331?

NSN 4820-01-459-9331 is a Valve,check, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-459-9331?

NSN 4820-01-459-9331 has 3 cross-referenced part numbers: 101188 1 1/4INC (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 101188 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 101188 11/4INCH (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).

What NSN replaces 4820-01-459-9331?

There are 7 known substitutes for 4820-01-459-9331: 4820-00-203-7675, 5998-00-236-3280, 2915-00-433-8992 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 101188 11/4INCH?

Key specifications for 101188 11/4INCH: Mounting Position: HORIZONTAL OR VERTICAL; End Item Identification: W/S WASP CLASS LHD; Style Designator: STRAIGHT THRU FLANGED ENDS; Valve Operation Method: AUTOMATIC. 5 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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