The Window,observation, cataloged under National Stock Number 9340-00-482-8637, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Optical Coating Laboratory, Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-00-482-8637 |
| Primary Part Number | 2500051 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Optical Coating Laboratory, Llc |
| Status | ACTIVE |
| Fourth Corner Radius | 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| First Corner Radius | 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Second Corner Radius | 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Surface Finish | POLISHED |
| Overall Thickness | 0.043 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN |
| Material Transparency | CLEAR |
| Style Designator | CIRCULAR |
| Material | GLASS |
| Third Corner Radius | 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2500051 PRIMARY | Optical Coating Laboratory, Llc (USA) |
| Reference | Meaning |
|---|---|
| 164B7556P3 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 9340-00-482-8637 is a Window,observation, manufactured by Optical Coating Laboratory, Llc, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-00-482-8637 has 1 manufacturer part number on file: 2500051 (Optical Coating Laboratory, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 7690-01-445-3916, 3040-01-460-1563. Verify interchangeability with system specifications before substitution.
Key specifications for 2500051: Fourth Corner Radius: 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; First Corner Radius: 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Second Corner Radius: 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Surface Finish: POLISHED. 9 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.