The Lens,helmet,welder's, cataloged under National Stock Number 4240-01-220-2940, 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 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4240-01-220-2940 |
| Primary Part Number | 579 .75 FOCAL |
| Item Name | Lens,helmet,welder's |
| FSC / FSG | 4240 / 42 — No Item Name Available |
| Manufacturer | American Optical Co |
| Status | CANCELLED |
| Material | PLASTIC |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 579 .75 FOCAL | American Optical Co (USA) |
| 579 .75 FOCAL | Aearo Company (USA) |
| 579.75 FOCAL | Aearo Company 1 Dba Aearo Div Ao Safety Occupational Prescription Eyewear (USA) |
| M175 | Kedman Co (USA) |
| 44970 .75 FOCAL | Aearo Company (USA) |
| 44970 .75 FOCAL | American Optical Co (USA) |
| MP-2 | Kedman Co (USA) |
NSN 4240-01-220-2940 is a Lens,helmet,welder's, manufactured by American Optical Co, classified under FSC 4240 (No Item Name Available). Status: cancelled.
NSN 4240-01-220-2940 has 7 cross-referenced part numbers: 579 .75 FOCAL (American Optical Co), 579 .75 FOCAL (Aearo Company), 579.75 FOCAL (Aearo Company 1 Dba Aearo Div Ao Safety Occupational Prescription Eyewear), M175 (Kedman Co), 44970 .75 FOCAL (Aearo Company) and 2 more.
There are 12 known substitutes for 4240-01-220-2940: 9540-00-145-8392, 3110-00-156-4713, 5330-00-285-9462 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 579 .75 FOCAL: Material: PLASTIC; Special Features: 1.750 FOCAL POWER FOR AGE 50 TO 52; MAGNIFYING LENS; Overall Width: 2.000 INCHES NOMINAL IN; Overall Length: 4.000 INCHES NOMINAL IN. 4 total characteristics are documented in the Federal Logistics Information System.
NSN 4240-01-220-2940 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.