The Ring,retaining,optical Element, cataloged under National Stock Number 6650-01-256-9151, 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 Rockwell Collins, Inc. Dba Rc Displays Systems. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-01-256-9151 |
| Primary Part Number | 42282-1 |
| Item Name | Ring,retaining,optical Element |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | Rockwell Collins, Inc. Dba Rc Displays Systems |
| Status | ACTIVE |
| Thread Pitch Diameters | +4.3484 TO 4.3533 INCHES IN |
| Outside Diameter | 4.375 INCHES NOMINAL IN |
| Thread Location | EXTERNAL |
| Screw Thread Series Designator | UNS |
| Thread Class | 2A A |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 42282-1 PRIMARY | Rockwell Collins, Inc. Dba Rc Displays Systems (USA) |
NSN 6650-01-256-9151 is a Ring,retaining,optical Element, manufactured by Rockwell Collins, Inc. Dba Rc Displays Systems, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-01-256-9151 has 1 manufacturer part number on file: 42282-1 (Rockwell Collins, Inc. Dba Rc Displays Systems).
1 possible match (shared part number, not a government interchangeability claim): 4210-01-573-4059. Verify interchangeability with system specifications before substitution.
Key specifications for 42282-1: Thread Pitch Diameters: +4.3484 TO 4.3533 INCHES IN; Outside Diameter: 4.375 INCHES NOMINAL IN; Thread Location: EXTERNAL; Special Features: 63 MICROINCH SURFACE FINISH. 6 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 6650-01-256-9151 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.