The Adapter,waveguide, cataloged under National Stock Number 5985-01-042-1972, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc. Government technical data includes 20 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 | 5985-01-042-1972 |
| Primary Part Number | A90EU16-1F |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc |
| Status | ACTIVE |
| Flange Inside Height | 0.400 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 0.200 INCHES NOMINAL SECOND FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.05 |
| Style Designator | WAVEGUIDE TO WAVEGUIDE |
| Waveguide Inside Width | 0.900 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 2.000 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Height | 2.000 INCHES NOMINAL SECOND FLANGE IN |
| Adapter Length | 2.000 INCHES NOMINAL IN |
| Flange Inside Width | 0.900 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 0.900 INCHES NOMINAL SECOND FLANGE IN |
| Flange Depth | 0.160 INCHES NOMINAL FIRST FLANGE IN |
| Flange Depth | 0.160 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 2.000 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 2.000 INCHES NOMINAL SECOND FLANGE IN |
| Material | COPPER ALLOY ALL FLANGE |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Style | COVER TYPE FIRST FLANGE |
| Flange Style | COVER TYPE SECOND FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A90EU16-1F PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
NSN 5985-01-042-1972 is a Adapter,waveguide, manufactured by Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-042-1972 has 1 manufacturer part number on file: A90EU16-1F (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
Key specifications for A90EU16-1F: Flange Inside Height: 0.400 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 0.200 INCHES NOMINAL SECOND FLANGE IN; Flange Quantity: 2; Voltage Standing Wave Ratio: 1.05. 20 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5985-01-042-1972 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.