The Lens,optical Instrument, cataloged under National Stock Number 6650-00-026-8136, is classified within Federal Supply Class 6650 (Optical Instruments, Test Equipment, Components and Accessories) of the Instruments and Laboratory Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-00-026-8136 |
| Primary Part Number | 278702-12 |
| Item Name | Lens,optical Instrument |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| FSC Application Data | 1. FIRE CONTROL,RANGE FINDER,MK 37,MOD 5 |
| Back Focal Length | 2.244 INCHES IN |
| Front Focal Length | 2.018 INCHES IN |
| Equivalent Focal Length | 2.244 INCHES IN |
| Material Document and Classification | JAN-G-174, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| Diameter | 1.378 INCHES NOMINAL IN |
| Abbe Constant | 41.000 |
| Axial Thickness | 0.354 INCHES NOMINAL IN |
| Material | GLASS OPTICAL |
| Refraction Index | 1.5790 NOMINAL |
| Single Lens Style | PLANO-CONVEX |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 278702-12 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 278702PC12 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 6650-00-026-8136 is a Lens,optical Instrument, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-00-026-8136 has 2 manufacturer part numbers on file: 278702-12 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 278702PC12 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 278702-12: FSC Application Data: 1. FIRE CONTROL,RANGE FINDER,MK 37,MOD 5; Back Focal Length: 2.244 INCHES IN; Front Focal Length: 2.018 INCHES IN; Equivalent Focal Length: 2.244 INCHES IN. 11 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6650-00-026-8136 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.