The Ring,retaining,optical Element, cataloged under National Stock Number 1240-00-177-0659, 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 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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 | 1240-00-177-0659 |
| Primary Part Number | 654745 |
| Item Name | Ring,retaining,optical Element |
| FSC / FSG | 1240 / 12 — No Item Name Available |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Class | 2B |
| Aperture Diameter | 2.125 INCHES NOMINAL IN |
| Thread Location | INTERNAL |
| Groove Location | INSIDE FACE OF FLANGE |
| Inner Groove Width | 0.0930 INCHES NOMINAL IN |
| Internal Flange Thickness | 0.064 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNS |
| Material | COPPER ALLOY 330 |
| Thread Location | INTERNAL |
| Thread Size | 2.437-32 |
| Thread Direction | RIGHT-HAND |
| Groove Location | INSIDE FACE OF FLANGE |
| Outside Diameter | 2.562 INCHES NOMINAL IN |
| Inner Groove Width | 0.0930 INCHES NOMINAL IN |
| Thread Length | 0.171 INCHES IN |
| Internal Flange Thickness | 0.064 INCHES NOMINAL IN |
| Aperture Diameter | 2.125 INCHES NOMINAL IN |
| Material | COPPER ALLOY 330 |
| Groove Diameter | 2.218 INCHES NOMINAL IN |
| Thread Size | 2.437-32 |
| Outside Diameter | 2.562 INCHES NOMINAL IN |
| Thread Length | 0.171 INCHES IN |
| Screw Thread Series Designator | UNS |
| Groove Diameter | 2.218 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 1240-00-177-0659 is a Ring,retaining,optical Element, 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 1240-00-177-0659 has 2 cross-referenced part numbers: 654745 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 265200 (Lockheed Martin Corporation Div Rms - Mitchel Field).
There are 3 known substitutes for 1240-00-177-0659: 5961-00-018-8974, 3110-00-100-0714, 2835-00-908-6449. Verify interchangeability with system specifications before substitution.
Key specifications for 654745: Thread Class: 2B; Aperture Diameter: 2.125 INCHES NOMINAL IN; Thread Location: INTERNAL; Groove Location: INSIDE FACE OF FLANGE. 28 total characteristics are documented in the Federal Logistics Information System.