PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N31837Diaphragm,valve,flat

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-222-8449 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-222-8449 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-222-8449. Primary manufacturer part number: N31837.
Features
  • Diaphragm,valve,flat — FSC 4820
  • Material Thickness: 0.219 INCHES NOMINAL IN
  • Style Designator: FLAT
  • Outside Diameter: 5.250 INCHES NOMINAL IN
  • Material: ALUMINUM
  • Center Hole Diameter: 1.000 INCHES NOMINAL IN
  • 4 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Aluminum construction
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-222-8449, 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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
NSN4820-01-222-8449
Primary Part NumberN31837
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Material Thickness0.219 INCHES NOMINAL IN
Style DesignatorFLAT
Outside Diameter5.250 INCHES NOMINAL IN
MaterialALUMINUM
Center Hole Diameter1.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4820-01-058-4343N38059 INTERCHANGEABLE
Stem,needle Valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-222-8323Y204556001 AND N39141 INTERCHANGEABLE
Valve,pilot
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-222-9667N16319 INTERCHANGEABLE
Sleeve,adjusting,pi
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-279-3085N30665 INTERCHANGEABLE
Cap,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
7510-01-280-252231837 INTERCHANGEABLE
Refill,photo Holder
Franklin Covey Co Government Group Products
5360-01-415-968631837 INTERCHANGEABLE
Spring,helical,compression
Canyon Engineering Products, Inc.
4810-01-592-210614801N INTERCHANGEABLE
Valve,flow Control
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
14801N PIECE 16 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
14801N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
31837 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N31837 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-01-058-4343INTERCHANGEABLE
STEM,NEEDLE VALVE
N38059
4820-01-222-8323INTERCHANGEABLE
VALVE,PILOT
Y204556001 AND N39141
4820-01-222-9667INTERCHANGEABLE
SLEEVE,ADJUSTING,PI
N16319
4820-01-279-3085INTERCHANGEABLE
CAP,VALVE
N30665
7510-01-280-2522INTERCHANGEABLE
REFILL,PHOTO HOLDER
31837
5360-01-415-9686INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
31837
4810-01-592-2106INTERCHANGEABLE
VALVE,FLOW CONTROL
14801N

Frequently Asked Questions

What is NSN 4820-01-222-8449?

NSN 4820-01-222-8449 is a Diaphragm,valve,flat, 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 4820-01-222-8449?

NSN 4820-01-222-8449 has 4 cross-referenced part numbers: 14801N PIECE 16 (Leslie Controls, Inc. Dba Leslie Controls Inc), 14801N (Leslie Controls, Inc. Dba Leslie Controls Inc), 31837 (Leslie Controls, Inc. Dba Leslie Controls Inc), N31837 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-222-8449?

There are 7 known substitutes for 4820-01-222-8449: 4820-01-058-4343, 4820-01-222-8323, 4820-01-222-9667 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N31837?

Key specifications for N31837: Material Thickness: 0.219 INCHES NOMINAL IN; Style Designator: FLAT; Outside Diameter: 5.250 INCHES NOMINAL IN; Material: ALUMINUM. 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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