The Window,observation, cataloged under National Stock Number 9340-01-390-3729, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Heraeus Kulzer Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-01-390-3729 |
| Primary Part Number | 335522 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Heraeus Kulzer Llc |
| 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 |
|---|---|
| 335522 PRIMARY | Heraeus Kulzer Llc (USA) |
| Reference | Meaning |
|---|---|
| LL-H37-0172 | 5/1 Secondary reference Naval Medical Material Support Command Detachment |
NSN 9340-01-390-3729 is a Window,observation, manufactured by Heraeus Kulzer Llc, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-01-390-3729 has 1 manufacturer part number on file: 335522 (Heraeus Kulzer Llc).
1 possible match (shared part number, not a government interchangeability claim): 3530-01-485-8074. Verify interchangeability with system specifications before substitution.
Key specifications for 335522: Special Features: END ITEM APPLICATION FURNACE BURNOUT CASTING,DENTAL; MODEL ACCU- THERM II, 2000; PART NO 335565; End Item Identification: 6520-01-257-5118. 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.