The Valve,exhalation,respirator, cataloged under National Stock Number 4240-01-251-3283, 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 Aearo Company. Government technical data includes 2 verified specifications, 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-251-3283 |
| Primary Part Number | 51558 |
| Item Name | Valve,exhalation,respirator |
| FSC / FSG | 4240 / 42 — No Item Name Available |
| Manufacturer | Aearo Company |
| Status | ACTIVE |
| Criticality Code Justification | TEXT |
| General Characteristics Item Description | SOLE SOURCE REQUIRED BY STATUTE 6.302 |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 51558 | Aearo Company (USA) |
NSN 4240-01-251-3283 is a Valve,exhalation,respirator, manufactured by Aearo Company, classified under FSC 4240 (No Item Name Available). Status: active.
NSN 4240-01-251-3283 has 1 cross-referenced part number: 51558 (Aearo Company).
There are 7 known substitutes for 4240-01-251-3283: 4320-00-132-4648, 3040-00-356-3500, 1680-00-511-5449 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 51558: End Item Identification: AMERICAN OPTICAL MODEL 7 STAR SERIES 7700 AND 7800 RESPIRAOTR; Criticality Code Justification: TEXT; General Characteristics Item Description: SOLE SOURCE REQUIRED BY STATUTE 6.302. 3 total characteristics are documented in the Federal Logistics Information System.