The Ring,retaining,optical Element, cataloged under National Stock Number 6650-01-155-3288, 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 Us Army Aviation and Missile Command. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6650-01-155-3288 |
| Primary Part Number | 13144027 |
| Item Name | Ring,retaining,optical Element |
| FSC / FSG | 6650 / 66 — Optical Instruments, Test Equipment, Components and Accessories |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Internal Flange Thickness | 0.020 INCHES NOMINAL IN |
| Thread Pitch Diameters | +1.2268 TO 1.2321 INCHES IN |
| Outside Diameter | 1.340 INCHES NOMINAL IN |
| Thread Length | 0.145 INCHES IN |
| Thread Location | INTERNAL |
| Aperture Diameter | 0.780 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1.250-28 |
| Screw Thread Series Designator | UN |
| Thread Class | 2B |
| Material | ALUMINUM ALLOY 6061 |
| 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 |
|---|---|
| 13144027 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 13144027 | 5/9 Secondary reference Forway Industries Inc |
| 13144027 | 5/9 Secondary reference Cla-Bar Industries |
| 13144027 | 5/9 Secondary reference General Tool Co |
NSN 6650-01-155-3288 is a Ring,retaining,optical Element, manufactured by Us Army Aviation and Missile Command, classified under FSC 6650, Optical Instruments, Test Equipment, Components and Accessories. Status: active.
NSN 6650-01-155-3288 has 1 manufacturer part number on file: 13144027 (Us Army Aviation and Missile Command).
Key specifications for 13144027: Internal Flange Thickness: 0.020 INCHES NOMINAL IN; Thread Pitch Diameters: +1.2268 TO 1.2321 INCHES IN; Overall Length: 0.310 INCHES NOMINAL IN; Outside Diameter: 1.340 INCHES NOMINAL 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 6650-01-155-3288 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.