The Cover,respirator, cataloged under National Stock Number 4240-01-251-3282, 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 American Optical Co. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-251-3282 |
| Primary Part Number | 51557 |
| Item Name | Cover,respirator |
| FSC / FSG | 4240 / 42 — No Item Name Available |
| Manufacturer | American Optical Co |
| Status | ACTIVE |
| Criticality Code Justification | TEXT |
| General Characteristics Item Description | FRONT COVER; SILICONE; W/SET OF 2 SCREWS; SOLE SOURCE REQUIRED BY STATUTE 6.302 |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4240-01-251-3282 is a Cover,respirator, manufactured by American Optical Co, classified under FSC 4240 (No Item Name Available). Status: active.
NSN 4240-01-251-3282 has 4 cross-referenced part numbers: 51557 (American Optical Co), 51557 (Aearo Company 1 Dba Aearo Div Ao Safety Occupational Prescription Eyewear), 51557 (3m Company), 51557 (Aearo Company).
There are 5 known substitutes for 4240-01-251-3282: 3120-00-356-3499, 5962-00-455-0843, 5310-00-551-6680 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for 51557: Criticality Code Justification: TEXT; General Characteristics Item Description: FRONT COVER; SILICONE; W/SET OF 2 SCREWS; SOLE SOURCE REQUIRED BY STATUTE 6.302; End Item Identification: AMERICAN OPTICAL MODEL 7 STAR S7800 SERIES RESPIRATOR. 3 total characteristics are documented in the Federal Logistics Information System.