PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9D-3/4Valve,back Flow

Watts Regulator Company · NSN 4820-01-294-6005 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-294-6005 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-294-6005. Primary manufacturer part number: 9D-3/4.
Features
  • Valve,back Flow — FSC 4820
  • General Characteristics Item Description: BRONZE BODY;RUBBER DIAPHRAGM AND DISK;MEDIA WATER;OPERATING PRESSURE 175 PSI;OPERATING TEMPERATURE 250 DEG FAHRENHEIT
  • 3 verified cross-references
  • Primary manufacturer: Watts Regulator Company
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,back Flow, cataloged under National Stock Number 4820-01-294-6005, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Watts Regulator Company. Government technical data includes 1 verified specification, 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-294-6005
Primary Part Number9D-3/4
Item NameValve,back Flow
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWatts Regulator Company
StatusACTIVE
General Characteristics Item DescriptionBRONZE BODY;RUBBER DIAPHRAGM AND DISK;MEDIA WATER;OPERATING PRESSURE 175 PSI;OPERATING TEMPERATURE 250 DEG FAHRENHEIT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5965-00-170-52358109929 INTERCHANGEABLE
Microphone,dynamic
Us Army Aviation and Missile Command
4820-00-422-94949D 1-2IN INTERCHANGEABLE
Valve,check
Watts Regulator Company
5961-00-520-84349D INTERCHANGEABLE
Transistor
Lucent Technologies Inc Corporate Headquarters
5315-01-186-13559D34 INTERCHANGEABLE
Pin,straight,headless
Link-Belt Cranes, L.p., Lllp
Cross-Reference Index
Part NumberManufacturer
9D-3/4 PRIMARY Watts Regulator Company (USA)
9D-3/4 Emery Air Freight Corp (USA)
9D Emery Air Freight Corp (USA)
Related Parts
5965-00-170-5235INTERCHANGEABLE
MICROPHONE,DYNAMIC
8109929
4820-00-422-9494INTERCHANGEABLE
VALVE,CHECK
9D 1-2IN
5961-00-520-8434INTERCHANGEABLE
TRANSISTOR
9D
5315-01-186-1355INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
9D34

Frequently Asked Questions

What is NSN 4820-01-294-6005?

NSN 4820-01-294-6005 is a Valve,back Flow, manufactured by Watts Regulator Company, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-294-6005?

NSN 4820-01-294-6005 has 3 cross-referenced part numbers: 9D-3/4 (Watts Regulator Company), 9D-3/4 (Emery Air Freight Corp), 9D (Emery Air Freight Corp).

What NSN replaces 4820-01-294-6005?

There are 4 known substitutes for 4820-01-294-6005: 5965-00-170-5235, 4820-00-422-9494, 5961-00-520-8434 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9D-3/4?

Key specifications for 9D-3/4: General Characteristics Item Description: BRONZE BODY;RUBBER DIAPHRAGM AND DISK;MEDIA WATER;OPERATING PRESSURE 175 PSI;OPERATING TEMPERATURE 250 DEG FAHRENHEIT. 1 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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