PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42743Valve,breathing Apparatus

Aqualung Usa, Inc · NSN 4220-01-591-2712 · FSC 4220 · No Item Name Available
Verified by PartsTable
NSN 4220-01-591-2712 — this item is cataloged by the U.S. Government under National Stock Number 4220-01-591-2712. Primary manufacturer part number: 42743.
Features
  • Valve,breathing Apparatus — FSC 4220
  • 1 verified cross-reference
  • Primary manufacturer: Aqualung Usa, Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,breathing Apparatus, cataloged under National Stock Number 4220-01-591-2712, is classified within Federal Supply Class 4220 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Aqualung Usa, Inc. This item has 1 commercial cross-reference 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.

Catalog Facts
Item NameValve,breathing Apparatus
FSC / FSG4220 — No Item Name Available (FSG 42)
ManufacturersAqualung Usa, Inc (CAGE 94120)
Technical Specifications
ParameterValue
NSN4220-01-591-2712
Primary Part Number42743
Item NameValve,breathing Apparatus
FSC / FSG4220 / 42 — No Item Name Available
ManufacturerAqualung Usa, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5962-01-178-240042743 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Div Rmd Strategic
4210-01-273-369442743 INTERCHANGEABLE
Release,valve
Tyco Fire Products Lp
2910-01-276-762225115505 INTERCHANGEABLE
Pump,fuel,cam Actuated
General Motors Llc Dba General Motors Llc
5950-01-286-3597310363-1 INTERCHANGEABLE
Reactor-Transformer
Raytheon Company
5950-01-328-58591700AS894 INTERCHANGEABLE
Coil,radio Frequency
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
5315-01-336-936042743 INTERCHANGEABLE
Key,woodruff
Ke Marine Inc Dba Ke Marine Inc
5310-01-727-623042743 INTERCHANGEABLE
Washer,concave
Te-Co Manufacturing Llc Dba Te-Co Manufacturing Llc
Cross-Reference Index
Part NumberManufacturer
42743 PRIMARY Aqualung Usa, Inc (USA)
Related Parts
5962-01-178-2400INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
42743
4210-01-273-3694INTERCHANGEABLE
RELEASE,VALVE
42743
2910-01-276-7622INTERCHANGEABLE
PUMP,FUEL,CAM ACTUATED
25115505
5950-01-286-3597INTERCHANGEABLE
REACTOR-TRANSFORMER
310363-1
5950-01-328-5859INTERCHANGEABLE
COIL,RADIO FREQUENCY
1700AS894
5315-01-336-9360INTERCHANGEABLE
KEY,WOODRUFF
42743
5310-01-727-6230INTERCHANGEABLE
WASHER,CONCAVE
42743

Frequently Asked Questions

What is NSN 4220-01-591-2712?

NSN 4220-01-591-2712 is a Valve,breathing Apparatus, manufactured by Aqualung Usa, Inc, classified under FSC 4220 (No Item Name Available). Status: active.

What are the part numbers for NSN 4220-01-591-2712?

NSN 4220-01-591-2712 has 1 cross-referenced part number: 42743 (Aqualung Usa, Inc).

What NSN replaces 4220-01-591-2712?

There are 7 known substitutes for 4220-01-591-2712: 5962-01-178-2400, 4210-01-273-3694, 2910-01-276-7622 and 4 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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