The Window,optical Instrument, cataloged under National Stock Number 1240-00-819-4713, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the government interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-00-819-4713 |
| Primary Part Number | 1575529 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 1240 / 12 — No Item Name Available |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thickness | 56.900 MILLIMETERS NOMINAL MM |
| FSC Application Data | FIRE CONTROL RANGEFINDER MK 21 MOD 2 |
| Material Document and Classification | JAN-G-174, GRADE A MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Material | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED |
| Bevel Depth | 12.700 MILLIMETERS NOMINAL MM |
| Refraction Index | 1.5171 NOMINAL |
| Diameter | 833.120 MILLIMETERS NOMINAL MM |
| Bevel Angle in Deg | 45.000 NOMINAL |
| Polished Periphery | NOT PROVIDED |
| Reflection Reducing Surface | BOTH |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1575529 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 1240-00-819-4713 is a Window,optical Instrument, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1240 (No Item Name Available). Status: active.
NSN 1240-00-819-4713 has 1 cross-referenced part number: 1575529 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
There are 8 known substitutes for 1240-00-819-4713: 1240-00-000-0160, 1240-00-001-4014, 1240-00-001-4015 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1575529: Thickness: 56.900 MILLIMETERS NOMINAL MM; FSC Application Data: FIRE CONTROL RANGEFINDER MK 21 MOD 2; Material Document and Classification: JAN-G-174, GRADE A MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Material: GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED. 10 total characteristics are documented in the Federal Logistics Information System.