The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-154-3548, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Boeing Company, the Dba Boeing. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-154-3548 |
| Primary Part Number | HB021532-003-00 |
| Item Name | Ring,retaining,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Boeing Company, the Dba Boeing |
| Status | ACTIVE |
| Internal Flange Thickness | 0.487 INCHES NOMINAL IN |
| Outside Diameter | 8.800 INCHES NOMINAL IN |
| Aperture Diameter | 6.606 INCHES NOMINAL IN |
| Mounting Configuration | 6 HOLES EQUALLY SPACED 0.218 PORM0.005 IN. DIA IN |
| Material | GLASS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HB021532-003-00 PRIMARY | Boeing Company, the Dba Boeing (USA) |
NSN 1240-01-154-3548 is a Ring,retaining,optical Element, manufactured by Boeing Company, the Dba Boeing, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-154-3548 has 1 manufacturer part number on file: HB021532-003-00 (Boeing Company, the Dba Boeing).
Key specifications for HB021532-003-00: Internal Flange Thickness: 0.487 INCHES NOMINAL IN; Outside Diameter: 8.800 INCHES NOMINAL IN; Aperture Diameter: 6.606 INCHES NOMINAL IN; Mounting Configuration: 6 HOLES EQUALLY SPACED 0.218 PORM0.005 IN. DIA IN. 5 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 1240-01-154-3548 has DEMIL Code B. 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.