The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-236-0388, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-236-0388 |
| Item Name | Ring,retaining,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Status | ACTIVE |
| Internal Flange Thickness | 0.020 INCHES NOMINAL IN |
| Outside Diameter | 1.337 INCHES NOMINAL IN |
| Aperture Diameter | 1.150 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 10094293-101 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1240-01-236-0388 is a Ring,retaining,optical Element, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
Key specifications for 1240-01-236-0388: Internal Flange Thickness: 0.020 INCHES NOMINAL IN; Outside Diameter: 1.337 INCHES NOMINAL IN; Aperture Diameter: 1.150 INCHES NOMINAL IN; Special Features: QQ-A-250/8 ALUMINUM PLATE 5052-H32(MC6093-01)OR WW-T-700/6 ALUMINUM TUBING 6061-T6(MC6661-01). 4 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.
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.