The Window,observation, cataloged under National Stock Number 9340-01-131-9603, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 9340-01-131-9603 |
| Primary Part Number | A-50671 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument |
| Status | ACTIVE |
| Overall Diameter | 6.000 INCHES NOMINAL IN |
| Material Transparency | CLEAR |
| Style Designator | CIRCULAR |
| Material | GLASS BOROSILICATE |
| 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 |
|---|---|
| A-50671 PRIMARY | Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument (USA) |
| Reference | Meaning |
|---|---|
| 50671 | 5/1 Secondary reference Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument |
NSN 9340-01-131-9603 is a Window,observation, manufactured by Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-01-131-9603 has 1 manufacturer part number on file: A-50671 (Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument).
1 possible match (shared part number, not a government interchangeability claim): 2590-01-302-2535. Verify interchangeability with system specifications before substitution.
Key specifications for A-50671: Overall Diameter: 6.000 INCHES NOMINAL IN; Material Transparency: CLEAR; Style Designator: CIRCULAR; End Item Identification: METER,FLUID FLOW INDICATING,DIFFERENTIAL PRESSURE,MERIAM INSTRUMENTS CO,MODEL 1126. 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.