PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N4778094Diaphragm,valve,flat

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-00-956-8042 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-956-8042 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-956-8042. Primary manufacturer part number: N4778094.
Features
  • Diaphragm,valve,flat — FSC 4820
  • Outside Diameter: 4.100 INCHES NOMINAL IN
  • Style Designator: FLAT
  • Material: RUBBER SYNTHETIC
  • Material Thickness: 0.025 INCHES NOMINAL IN
  • Center Hole Diameter: 0.535 INCHES NOMINAL IN
  • 3 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 Rubber Synthetic construction
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-956-8042, 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 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-956-8042
Primary Part NumberN4778094
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Outside Diameter4.100 INCHES NOMINAL IN
Style DesignatorFLAT
MaterialRUBBER SYNTHETIC
Material Thickness0.025 INCHES NOMINAL IN
Center Hole Diameter0.535 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5940-00-156-15098195670 INTERCHANGEABLE
Terminal,lug
Us Army Aviation and Missile Command
5985-01-386-9492G268594-1 INTERCHANGEABLE
Attenuator,fixed
Raytheon Company Dba Raytheon Co
Cross-Reference Index
Part NumberManufacturer
N4778094 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
4778094 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
47780 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5940-00-156-1509INTERCHANGEABLE
TERMINAL,LUG
8195670
5985-01-386-9492INTERCHANGEABLE
ATTENUATOR,FIXED
G268594-1

Frequently Asked Questions

What is NSN 4820-00-956-8042?

NSN 4820-00-956-8042 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 4820-00-956-8042?

NSN 4820-00-956-8042 has 3 cross-referenced part numbers: N4778094 (Leslie Controls, Inc. Dba Leslie Controls Inc), 4778094 (Leslie Controls, Inc. Dba Leslie Controls Inc), 47780 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-00-956-8042?

There are 2 known substitutes for 4820-00-956-8042: 5940-00-156-1509, 5985-01-386-9492. Verify interchangeability with system specifications before substitution.

What are the specifications of N4778094?

Key specifications for N4778094: Outside Diameter: 4.100 INCHES NOMINAL IN; Style Designator: FLAT; Material: RUBBER SYNTHETIC; Special Features: FABRIC REINFORCED. 6 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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