The Window,optical Instrument, cataloged under National Stock Number 1240-01-068-2421, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-068-2421 |
| Primary Part Number | 12266880 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 1240 / 12 — No Item Name Available |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Diameter | 50.6 MILLIMETERS MINIMUM AND 51.0 MILLIMETERS MAXIMUM MM |
| Thickness | 5.8 MILLIMETERS MINIMUM AND 6.0 MILLIMETERS MAXIMUM MM |
| Material Document and Classification | MIL-G-174, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Material | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED |
| Polished Periphery | NOT PROVIDED |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 957C048080 | L3 Technologies, Inc. Div L3 Keo (USA) |
| 048080 | L3 Technologies, Inc. Div L3 Keo (USA) |
| 12266880 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 1240-01-068-2421 is a Window,optical Instrument, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 1240 (No Item Name Available). Status: active.
NSN 1240-01-068-2421 has 3 cross-referenced part numbers: 957C048080 (L3 Technologies, Inc. Div L3 Keo), 048080 (L3 Technologies, Inc. Div L3 Keo), 12266880 (U S Army Tank Automotive Command Amsta-Im-Mm).
There are 3 known substitutes for 1240-01-068-2421: 5905-00-106-1249, 5340-01-408-1954, 2930-01-604-6250. Verify interchangeability with system specifications before substitution.
Key specifications for 12266880: Diameter: 50.6 MILLIMETERS MINIMUM AND 51.0 MILLIMETERS MAXIMUM MM; Thickness: 5.8 MILLIMETERS MINIMUM AND 6.0 MILLIMETERS MAXIMUM MM; Material Document and Classification: MIL-G-174, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Material: GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED. 5 total characteristics are documented in the Federal Logistics Information System.