The Optical Window Asse, cataloged under National Stock Number 2040-01-083-3928, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. The manufacturer of record is Derbyshire Machine & Tool Co. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2040-01-083-3928 |
| Primary Part Number | 92-D-283 |
| Item Name | Optical Window Asse |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| 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 |
|---|---|
| 92-D-283 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 87861-2102 ITEM 13 | 5/9 Secondary reference U.S. Government activity |
| 4695803-0013 | 3/9 Design control — primary reference U.S. Government activity |
| 4695803-0013 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 2040-01-083-3928 is a Optical Window Asse, manufactured by Derbyshire Machine & Tool Co, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-083-3928 has 1 manufacturer part number on file: 92-D-283 (Derbyshire Machine & Tool Co).
Key specifications for 92-D-283: End Item Identification: MSL TB. 0 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.