PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet
MRO / Fire Fighting, Rescue, and Safety Equipment / 4240-01-250-2262

R4030Respirator,air Filtering

Square D Co Monroe Plant · NSN 4240-01-250-2262 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-01-250-2262 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-250-2262. Primary manufacturer part number: R4030.
MRO FSG 42 NO ITEM NAME AVAILABLE Technical Drawing
4240-01-250-2262 — No Item Name Available illustration
Features
  • Respirator,air Filtering — FSC 4240
  • Exhaust Valve: INCLUDED
  • Filter Replaceability: REPLACEABLE
  • Mask Filter Quantity: 2
  • Material Type: ELASTIC
  • Mask Type: HALF FACEPIECE
  • Material: RUBBER MASK
  • Criticality Code Justification: FEAT
Applications
  • Applications requiring Rubber Mask construction
General Description

The Respirator,air Filtering, cataloged under National Stock Number 4240-01-250-2262, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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
NSN4240-01-250-2262
Primary Part NumberR4030
Item NameRespirator,air Filtering
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerSquare D Co Monroe Plant
StatusACTIVE
Exhaust ValveINCLUDED
Filter ReplaceabilityREPLACEABLE
Mask Filter Quantity2
Material TypeELASTIC
Mask TypeHALF FACEPIECE
MaterialRUBBER MASK
Criticality Code JustificationFEAT
AdjustabilityADJUSTABLE
Approval DesignatorERR-060
Head HarnessINCLUDED
Filter TypeCARTRIDGE AND FILTER PAD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
⇄ Verified Substitutes 12
5133-00-222-946850434 INTERCHANGEABLE
Drill,twist
Morse Cutting Tools
5210-00-293-00055210-00-293-0005 INTERCHANGEABLE
Level,bench
General Services Administration Federal Supply Service
3040-00-356-3325SC-B-70021 INTERCHANGEABLE
Plate,retaining,shaft
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4820-00-446-2744504-3/4 INTERCHANGEABLE
Valve,angle
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4440-00-792-17315043-4 INTERCHANGEABLE
Desiccant Container,dehumidifier
Raytheon Company Div Rmd Strategic
5910-00-810-1265101239-4 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Viking Technologies, Ltd.
5330-01-197-744050434 INTERCHANGEABLE
Seal
Lowensten W W
4730-01-282-5070 INTERCHANGEABLE
Adapter,straight,pipe to Tube
6680-01-317-7958005-013-001 INTERCHANGEABLE
Switch,liquid Level
Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
5975-01-331-42970050430410 INTERCHANGEABLE
Plate,electrical Grounding
Newton Instrument Company Dba Newton Instrument Co
Cross-Reference Index
Part NumberManufacturer
R4030 American Optical Co (USA)
R4030 PRIMARY Square D Co Monroe Plant (USA)
50434 Aearo Company (USA)
50434 American Optical Co (USA)
Related Parts
5133-00-222-9468INTERCHANGEABLE
DRILL,TWIST
50434
5210-00-293-0005INTERCHANGEABLE
LEVEL,BENCH
5210-00-293-0005
3040-00-356-3325INTERCHANGEABLE
PLATE,RETAINING,SHAFT
SC-B-70021
4820-00-446-2744INTERCHANGEABLE
VALVE,ANGLE
504-3/4
4440-00-792-1731INTERCHANGEABLE
DESICCANT CONTAINER,DEHUMIDIFIER
5043-4
5910-00-810-1265INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
101239-4
5330-01-197-7440INTERCHANGEABLE
SEAL
50434
4730-01-282-5070INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
6680-01-317-7958INTERCHANGEABLE
SWITCH,LIQUID LEVEL
005-013-001
5975-01-331-4297INTERCHANGEABLE
PLATE,ELECTRICAL GROUNDING
0050430410
2530-01-588-9171INTERCHANGEABLE
RIM,WHEEL,PNEUMATIC TIRE
50434EX
5950-01-597-2552INTERCHANGEABLE
TRANSFORMER,POWER
50434

Frequently Asked Questions

What is NSN 4240-01-250-2262?

NSN 4240-01-250-2262 is a Respirator,air Filtering, manufactured by Square D Co Monroe Plant, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-01-250-2262?

NSN 4240-01-250-2262 has 4 cross-referenced part numbers: R4030 (American Optical Co), R4030 (Square D Co Monroe Plant), 50434 (Aearo Company), 50434 (American Optical Co).

What NSN replaces 4240-01-250-2262?

There are 12 known substitutes for 4240-01-250-2262: 5133-00-222-9468, 5210-00-293-0005, 3040-00-356-3325 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of R4030?

Key specifications for R4030: Exhaust Valve: INCLUDED; Filter Replaceability: REPLACEABLE; Mask Filter Quantity: 2; Material Type: ELASTIC. 12 total characteristics are documented in the Federal Logistics Information System.

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