PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

72501/9Facepiece Assembly,chemical-Biol

Avon Protection Systems Incorporated Dba Avon Protection Systems Inc · NSN 4240-01-566-0869 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-01-566-0869 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-566-0869. Primary manufacturer part number: 72501/9.
Features
  • Facepiece Assembly,chemical-Biol — FSC 4240
  • 2 verified cross-references
  • Primary manufacturer: Avon Protection Systems Incorporated Dba Avon Protection Systems Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Facepiece Assembly,chemical-Biol, cataloged under National Stock Number 4240-01-566-0869, 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 Avon Protection Systems Incorporated Dba Avon Protection Systems Inc. This item has 2 commercial cross-references from 2 manufacturers, 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
NSN4240-01-566-0869
Primary Part Number72501/9
Item NameFacepiece Assembly,chemical-Biol
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerAvon Protection Systems Incorporated Dba Avon Protection Systems Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5998-00-089-38007250-19 INTERCHANGEABLE
Circuit Card Assembly
Rockwell Collins, Inc. Dba Rc Displays Systems
5961-00-861-4352 INTERCHANGEABLE
Semiconductor Device,diode
5895-01-046-576310125 INTERCHANGEABLE
Converter,frequency,electronic
Creating Technology Solutions, Llc Dba Technology Research Corp Div Technology Research Corp
Cross-Reference Index
Part NumberManufacturer
72501/9 PRIMARY Avon Protection Systems Incorporated Dba Avon Protection Systems Inc (USA)
72501/9 Avon Ruber Plc - Avon Technical Products (GBR)
Related Parts
5998-00-089-3800INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
7250-19
5961-00-861-4352INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5895-01-046-5763INTERCHANGEABLE
CONVERTER,FREQUENCY,ELECTRONIC
10125

Frequently Asked Questions

What is NSN 4240-01-566-0869?

NSN 4240-01-566-0869 is a Facepiece Assembly,chemical-Biol, manufactured by Avon Protection Systems Incorporated Dba Avon Protection Systems Inc, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-01-566-0869?

NSN 4240-01-566-0869 has 2 cross-referenced part numbers: 72501/9 (Avon Protection Systems Incorporated Dba Avon Protection Systems Inc), 72501/9 (Avon Ruber Plc - Avon Technical Products).

What NSN replaces 4240-01-566-0869?

There are 3 known substitutes for 4240-01-566-0869: 5998-00-089-3800, 5961-00-861-4352, 5895-01-046-5763. Verify interchangeability with system specifications before substitution.

What are the specifications of 72501/9?

Key specifications for 72501/9: Special Features: MASK ASSEMBLY, LGE, TWIN PORT; End Item Identification: M53 MASK ASSEMBLY, TWIN PORT. 2 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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