PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6647-1Pad,breathing Apparatus

Avox Systems Inc Dba Avox Systems Inc · NSN 4240-00-724-5366 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-00-724-5366 — this item is cataloged by the U.S. Government under National Stock Number 4240-00-724-5366. Primary manufacturer part number: 6647-1.
Features
  • Pad,breathing Apparatus — FSC 4240
  • General Characteristics Item Description: 12.0 IN. LG,2.5 IN. W,0.312 IN. THK,2 NO. 12 BLACK WEB MTG STRAPS 0.75 IN. W,6.25 IN. LG W/SOCKET FASTENERS IN
  • 1 verified cross-reference
  • Primary manufacturer: Avox Systems Inc Dba Avox Systems Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Pad,breathing Apparatus, cataloged under National Stock Number 4240-00-724-5366, is classified within Federal Supply Class 4240 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Avox Systems Inc Dba Avox Systems Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4240-00-724-5366
Primary Part Number6647-1
Item NamePad,breathing Apparatus
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerAvox Systems Inc Dba Avox Systems Inc
StatusACTIVE
General Characteristics Item Description12.0 IN. LG,2.5 IN. W,0.312 IN. THK,2 NO. 12 BLACK WEB MTG STRAPS 0.75 IN. W,6.25 IN. LG W/SOCKET FASTENERS IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3455-01-005-488310950 INTERCHANGEABLE
Blade,band Saw,metal Cutting
L.s. Starrett Company (the) Div Tool Division
6250-01-095-233366471 INTERCHANGEABLE
Socket,lamp
Tld Ace Corp Div Tld Ace
2530-01-365-0740E4HZ2B107-C INTERCHANGEABLE
Parts Kit,hydraulic Brake Wheel
Ford Motor Craft
Cross-Reference Index
Part NumberManufacturer
6647-1 PRIMARY Avox Systems Inc Dba Avox Systems Inc (USA)
Related Parts
3455-01-005-4883INTERCHANGEABLE
BLADE,BAND SAW,METAL CUTTING
10950
6250-01-095-2333INTERCHANGEABLE
SOCKET,LAMP
66471
2530-01-365-0740INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE WHEEL
E4HZ2B107-C

Frequently Asked Questions

What is NSN 4240-00-724-5366?

NSN 4240-00-724-5366 is a Pad,breathing Apparatus, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-00-724-5366?

NSN 4240-00-724-5366 has 1 cross-referenced part number: 6647-1 (Avox Systems Inc Dba Avox Systems Inc).

What NSN replaces 4240-00-724-5366?

There are 3 known substitutes for 4240-00-724-5366: 3455-01-005-4883, 6250-01-095-2333, 2530-01-365-0740. Verify interchangeability with system specifications before substitution.

What are the specifications of 6647-1?

Key specifications for 6647-1: General Characteristics Item Description: 12.0 IN. LG,2.5 IN. W,0.312 IN. THK,2 NO. 12 BLACK WEB MTG STRAPS 0.75 IN. W,6.25 IN. LG W/SOCKET FASTENERS IN. 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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