PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R52ACartridge,respirator,air Filteri

Square D Co Monroe Plant · NSN 4240-01-245-3326 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-01-245-3326 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-245-3326. Primary manufacturer part number: R52A.
Features
  • Cartridge,respirator,air Filteri — FSC 4240
  • Hazard Protection Feature: ACID GASSES
  • Criticality Code Justification: FEAT
  • 4 verified cross-references
  • Primary manufacturer: Square D Co Monroe Plant
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cartridge,respirator,air Filteri, cataloged under National Stock Number 4240-01-245-3326, 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 Square D Co Monroe Plant. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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
NSN4240-01-245-3326
Primary Part NumberR52A
Item NameCartridge,respirator,air Filteri
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerSquare D Co Monroe Plant
StatusACTIVE
Hazard Protection FeatureACID GASSES
Criticality Code JustificationFEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-156-352206575AB INTERCHANGEABLE
Bearing,ball,annular
Cnh Industrial America Llc Dba Cnh America
2590-00-214-227951025 INTERCHANGEABLE
Cap,filler Opening
Shaw Development, Llc
5133-00-243-2213 INTERCHANGEABLE
Drill,twist
4730-00-470-6625CS4730-0125 INTERCHANGEABLE
Fitting Kit,tube-Pipe
Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)
5920-00-532-3211 INTERCHANGEABLE
Fuse Link,electrical
1620-00-756-91685102 INTERCHANGEABLE
Cylinder,nose Landi
Goodrich Aerospace Canada Ltd
4810-00-783-407551025 INTERCHANGEABLE
Sleeve and Slide,directional Con
Woodward Hrt Inc
6680-00-893-3712R-52A INTERCHANGEABLE
Rotor,flow Sight Indicator
Clark-Reliance Llc Dba Jacoby-Tarbox
7510-01-054-4035107675-001 INTERCHANGEABLE
Ribbon,inking
Printronix, Llc
5998-01-146-374963D702842G1 INTERCHANGEABLE
Circuit Card Assembly
Lockheed Martin Corporation Div Rotary and Mission Systems
Cross-Reference Index
Part NumberManufacturer
R52A PRIMARY Square D Co Monroe Plant (USA)
R52A American Optical Co (USA)
51025 American Optical Co (USA)
51025 Square D Co Monroe Plant (USA)
Related Parts
3110-00-156-3522INTERCHANGEABLE
BEARING,BALL,ANNULAR
06575AB
2590-00-214-2279INTERCHANGEABLE
CAP,FILLER OPENING
51025
5133-00-243-2213INTERCHANGEABLE
DRILL,TWIST
4730-00-470-6625INTERCHANGEABLE
FITTING KIT,TUBE-PIPE
CS4730-0125
5920-00-532-3211INTERCHANGEABLE
FUSE LINK,ELECTRICAL
1620-00-756-9168INTERCHANGEABLE
CYLINDER,NOSE LANDI
5102
4810-00-783-4075INTERCHANGEABLE
SLEEVE AND SLIDE,DIRECTIONAL CON
51025
6680-00-893-3712INTERCHANGEABLE
ROTOR,FLOW SIGHT INDICATOR
R-52A
7510-01-054-4035INTERCHANGEABLE
RIBBON,INKING
107675-001
5998-01-146-3749INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
63D702842G1
5340-01-334-3407INTERCHANGEABLE
CLIP,RETAINING
51025
5305-01-424-3506INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
51025

Frequently Asked Questions

What is NSN 4240-01-245-3326?

NSN 4240-01-245-3326 is a Cartridge,respirator,air Filteri, manufactured by Square D Co Monroe Plant, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-01-245-3326?

NSN 4240-01-245-3326 has 4 cross-referenced part numbers: R52A (Square D Co Monroe Plant), R52A (American Optical Co), 51025 (American Optical Co), 51025 (Square D Co Monroe Plant).

What NSN replaces 4240-01-245-3326?

There are 12 known substitutes for 4240-01-245-3326: 3110-00-156-3522, 2590-00-214-2279, 5133-00-243-2213 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of R52A?

Key specifications for R52A: Special Features: USED ON AMERICAN OPTICAL MODELS R/S4000,R/S5000,R/S6000 AND R/S7000 RESPIRATORS; NIOSH APPROVAL TC-23C-339/340; SOLE SOURCE REQUIRED BY STATUTE 6.302; Hazard Protection Feature: ACID GASSES; Criticality Code Justification: FEAT. 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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