PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N11975Piston,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-179-6376 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-179-6376 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-179-6376. Primary manufacturer part number: N11975.
Features
  • Piston,valve — FSC 4820
  • Material: STEEL
  • Valve Model Number for Which Designed: CLASS LNS-5
  • Features Provided: THREADED
  • Valve Design Control Activity: 35795
  • Valve Size for Which Designed: 4.000 INCHES IN
  • Valve Type for Which Designed: PRESSURE REDUCING
  • Outside Diameter: 4.732 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel construction
General Description

The Piston,valve, cataloged under National Stock Number 4820-01-179-6376, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 7 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-179-6376
Primary Part NumberN11975
Item NamePiston,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
MaterialSTEEL
Valve Model Number for Which DesignedCLASS LNS-5
Features ProvidedTHREADED
Valve Design Control Activity35795
Valve Size for Which Designed4.000 INCHES IN
Valve Type for Which DesignedPRESSURE REDUCING
Outside Diameter4.732 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-036-1516N10686 INTERCHANGEABLE
Piston,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-00-036-1517N59921 INTERCHANGEABLE
Piston,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-00-036-1523N10737 INTERCHANGEABLE
Piston,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-00-036-1552N09442 INTERCHANGEABLE
Piston,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-00-036-1634N09439 INTERCHANGEABLE
Piston,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-00-217-2772N11124 INTERCHANGEABLE
Disk,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4310-00-306-1319N11122 INTERCHANGEABLE
Cylinder Sleeve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-00-403-5640N11190 INTERCHANGEABLE
Disk,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4910-00-473-758711-975 INTERCHANGEABLE
Support
Unison Industries Llc
5306-00-531-0852 INTERCHANGEABLE
Bolt,machine
Cross-Reference Index
Part NumberManufacturer
N11975 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
17389N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
11975 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-00-036-1516INTERCHANGEABLE
PISTON,VALVE
N10686
4820-00-036-1517INTERCHANGEABLE
PISTON,VALVE
N59921
4820-00-036-1523INTERCHANGEABLE
PISTON,VALVE
N10737
4820-00-036-1552INTERCHANGEABLE
PISTON,VALVE
N09442
4820-00-036-1634INTERCHANGEABLE
PISTON,VALVE
N09439
4820-00-217-2772INTERCHANGEABLE
DISK,VALVE
N11124
4310-00-306-1319INTERCHANGEABLE
CYLINDER SLEEVE
N11122
4820-00-403-5640INTERCHANGEABLE
DISK,VALVE
N11190
4910-00-473-7587INTERCHANGEABLE
SUPPORT
11-975
5306-00-531-0852INTERCHANGEABLE
BOLT,MACHINE
4140-00-625-1780INTERCHANGEABLE
FAN,CENTRIFUGAL
021197
5930-00-889-7594INTERCHANGEABLE
SWITCH,ROTARY
2134815

Frequently Asked Questions

What is NSN 4820-01-179-6376?

NSN 4820-01-179-6376 is a Piston,valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-179-6376?

NSN 4820-01-179-6376 has 3 cross-referenced part numbers: N11975 (Leslie Controls, Inc. Dba Leslie Controls Inc), 17389N (Leslie Controls, Inc. Dba Leslie Controls Inc), 11975 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-179-6376?

There are 12 known substitutes for 4820-01-179-6376: 4820-00-036-1516, 4820-00-036-1517, 4820-00-036-1523 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N11975?

Key specifications for N11975: Material: STEEL; Valve Model Number for Which Designed: CLASS LNS-5; Features Provided: THREADED; Valve Design Control Activity: 35795. 8 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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