PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3093-01Diaphragm,valve,flat

Watts Automatic Control Valve Inc · NSN 4820-00-167-4203 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-167-4203 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-167-4203. Primary manufacturer part number: 3093-01.
Features
  • Diaphragm,valve,flat — FSC 4820
  • Center Hole Diameter: 0.375 INCHES NOMINAL IN
  • Outside Diameter: 3.563 INCHES NOMINAL IN
  • Bolt Hole Quantity: 8
  • Material: RUBBER CHLOROPRENE CLASS CR
  • Bolt Circle Diameter: 3.156 INCHES NOMINAL IN
  • Material Thickness: 0.020 INCHES NOMINAL IN
  • Hole Diameter: 0.203 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Chloroprene Class Cr construction
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-167-4203, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Watts Automatic Control Valve Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-167-4203
Primary Part Number3093-01
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWatts Automatic Control Valve Inc
StatusACTIVE
Center Hole Diameter0.375 INCHES NOMINAL IN
Outside Diameter3.563 INCHES NOMINAL IN
Bolt Hole Quantity8
MaterialRUBBER CHLOROPRENE CLASS CR
Bolt Circle Diameter3.156 INCHES NOMINAL IN
Material Thickness0.020 INCHES NOMINAL IN
Hole Diameter0.203 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5360-00-105-391630930-1 INTERCHANGEABLE
Spring,helical,compression
Solar Turbines Incorporated Dba Solar Turbines Incorporated
4810-01-073-307030931 INTERCHANGEABLE
Sleeve,directional Control Linea
Woodward Hrt Inc
4820-01-227-853230931 INTERCHANGEABLE
Guide,helical Compression Spring
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5342-01-282-213430-931 INTERCHANGEABLE
Rod,special
Rosenboom Machine and Tool Inc
5310-01-336-103230930-1 INTERCHANGEABLE
Washer,flat
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
4730-01-373-5724NB7309314H INTERCHANGEABLE
Strainer Element,sediment
Leslie Controls, Inc. Dba Leslie Controls Inc
5340-01-422-926730931 INTERCHANGEABLE
Cap,protective,dust and Moisture
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
6145-01-502-9751309301 INTERCHANGEABLE
Wire,electrical
Preleg Inc
6515-01-597-9486309301 INTERCHANGEABLE
Syringe and Needle,hypodermic
Becton, Dickinson and Co Dba Becton Dickinson & Co
Cross-Reference Index
Part NumberManufacturer
3093-1 Muesco Inc Dba Muesco Mallay Inc (USA)
3093-1 Watts Automatic Control Valve Inc (USA)
3093-01 PRIMARY Watts Automatic Control Valve Inc (USA)
Related Parts
5360-00-105-3916INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
30930-1
4810-01-073-3070INTERCHANGEABLE
SLEEVE,DIRECTIONAL CONTROL LINEA
30931
4820-01-227-8532INTERCHANGEABLE
GUIDE,HELICAL COMPRESSION SPRING
30931
5342-01-282-2134INTERCHANGEABLE
ROD,SPECIAL
30-931
5310-01-336-1032INTERCHANGEABLE
WASHER,FLAT
30930-1
4730-01-373-5724INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
NB7309314H
5340-01-422-9267INTERCHANGEABLE
CAP,PROTECTIVE,DUST AND MOISTURE
30931
6145-01-502-9751INTERCHANGEABLE
WIRE,ELECTRICAL
309301
6515-01-597-9486INTERCHANGEABLE
SYRINGE AND NEEDLE,HYPODERMIC
309301

Frequently Asked Questions

What is NSN 4820-00-167-4203?

NSN 4820-00-167-4203 is a Diaphragm,valve,flat, manufactured by Watts Automatic Control Valve Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-167-4203?

NSN 4820-00-167-4203 has 3 cross-referenced part numbers: 3093-1 (Muesco Inc Dba Muesco Mallay Inc), 3093-1 (Watts Automatic Control Valve Inc), 3093-01 (Watts Automatic Control Valve Inc).

What NSN replaces 4820-00-167-4203?

There are 9 known substitutes for 4820-00-167-4203: 5360-00-105-3916, 4810-01-073-3070, 4820-01-227-8532 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3093-01?

Key specifications for 3093-01: Center Hole Diameter: 0.375 INCHES NOMINAL IN; Outside Diameter: 3.563 INCHES NOMINAL IN; Bolt Hole Quantity: 8; Material: RUBBER CHLOROPRENE CLASS CR. 7 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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