PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3440-01Diaphragm,valve,flat

Watts Automatic Control Valve Inc · NSN 4820-01-151-4022 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-151-4022 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-151-4022. Primary manufacturer part number: 3440-01.
Features
  • Diaphragm,valve,flat — FSC 4820
  • Bolt Hole Quantity: 8
  • Style Designator: FLAT
  • Material: NICKEL ALLOY
  • 3 verified cross-references
  • Primary manufacturer: Watts Automatic Control Valve Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy construction
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-151-4022, 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 3 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-151-4022
Primary Part Number3440-01
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWatts Automatic Control Valve Inc
StatusACTIVE
Bolt Hole Quantity8
Style DesignatorFLAT
MaterialNICKEL ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5963-00-005-02893440-01 INTERCHANGEABLE
Oscillator,crystal Controlled
Monitor Products Co. Inc. Dba Monitor Products Co. Inc.
4310-00-354-645134-401 INTERCHANGEABLE
Bolt,connecting Rod
Dresser Industries Inc Leroi Div
9905-00-902-30243440-1 INTERCHANGEABLE
Numeral,sign
Brady United States
5955-01-008-87613440-1 INTERCHANGEABLE
Oscillator,crystal Controlled
Monitor Products Co. Inc. Dba Monitor Products Co. Inc.
2915-01-035-11303440-1 INTERCHANGEABLE
Ring,wear
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
4320-01-103-805434401 INTERCHANGEABLE
Pump,rotary
Robbins and Myers Inc Fluids Handling Div Motno Indistrial Products Business Unit
5360-01-109-2718 INTERCHANGEABLE
Spring,retainer
6520-01-125-6595 INTERCHANGEABLE
Liner,denture,temporary Resilien
5365-01-177-8455 INTERCHANGEABLE
Spacer,sleeve
4240-01-276-827803488 INTERCHANGEABLE
Sock,paint Sprayer
C&h Distributors, Llc
Cross-Reference Index
Part NumberManufacturer
3440-1 Watts Automatic Control Valve Inc (USA)
3440-01 PRIMARY Watts Automatic Control Valve Inc (USA)
3440-1 Muesco Inc Dba Muesco Mallay Inc (USA)
Related Parts
5963-00-005-0289INTERCHANGEABLE
OSCILLATOR,CRYSTAL CONTROLLED
3440-01
4310-00-354-6451INTERCHANGEABLE
BOLT,CONNECTING ROD
34-401
9905-00-902-3024INTERCHANGEABLE
NUMERAL,SIGN
3440-1
5955-01-008-8761INTERCHANGEABLE
OSCILLATOR,CRYSTAL CONTROLLED
3440-1
2915-01-035-1130INTERCHANGEABLE
RING,WEAR
3440-1
4320-01-103-8054INTERCHANGEABLE
PUMP,ROTARY
34401
5360-01-109-2718INTERCHANGEABLE
SPRING,RETAINER
6520-01-125-6595INTERCHANGEABLE
LINER,DENTURE,TEMPORARY RESILIEN
5365-01-177-8455INTERCHANGEABLE
SPACER,SLEEVE
4240-01-276-8278INTERCHANGEABLE
SOCK,PAINT SPRAYER
03488
6625-01-372-3905INTERCHANGEABLE
MULTIMETER
6110-01-464-6891INTERCHANGEABLE
CONTACTOR,MAGNETIC
34401

Frequently Asked Questions

What is NSN 4820-01-151-4022?

NSN 4820-01-151-4022 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 4820-01-151-4022?

NSN 4820-01-151-4022 has 3 cross-referenced part numbers: 3440-1 (Watts Automatic Control Valve Inc), 3440-01 (Watts Automatic Control Valve Inc), 3440-1 (Muesco Inc Dba Muesco Mallay Inc).

What NSN replaces 4820-01-151-4022?

There are 12 known substitutes for 4820-01-151-4022: 5963-00-005-0289, 4310-00-354-6451, 9905-00-902-3024 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3440-01?

Key specifications for 3440-01: Bolt Hole Quantity: 8; Style Designator: FLAT; Material: NICKEL ALLOY. 3 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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