The Cartridge,respirator,air Filteri, cataloged under National Stock Number 4240-01-245-5914, 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 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-245-5914 |
| Primary Part Number | R57B |
| Item Name | Cartridge,respirator,air Filteri |
| FSC / FSG | 4240 / 42 — No Item Name Available |
| Manufacturer | Square D Co Monroe Plant |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Hazard Protection Feature | DUST AND MIST |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4240-01-245-5914 is a Cartridge,respirator,air Filteri, manufactured by Square D Co Monroe Plant, classified under FSC 4240 (No Item Name Available). Status: active.
NSN 4240-01-245-5914 has 5 cross-referenced part numbers: 51037 (Aearo Company), 51037 (American Optical Co), R57A (Aearo Company), R57A (American Optical Co), R57B (Square D Co Monroe Plant).
There are 7 known substitutes for 4240-01-245-5914: 1610-00-119-6532, 5133-00-232-2867, 6685-01-003-7707 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for R57B: Special Features: USED ON AMERICAN OPTICAL MODELS R/S4000,R/S5000,R/S6000 AND R/S7000 RESPIRATORS; NIOSH APPROVED TC-21C-249/250; SOLE SOURCE REQUIRED BY STATUTE 6.302; Criticality Code Justification: FEAT; Hazard Protection Feature: DUST AND MIST. 3 total characteristics are documented in the Federal Logistics Information System.