The Waveguide Assembly, cataloged under National Stock Number 5985-01-456-4637, 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 11 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-456-4637 |
| Primary Part Number | 90BE18-1C |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc |
| Status | ACTIVE |
| Flange Quantity | 2 |
| Style Designator | BEND TYPE |
| Waveguide Offset Distance | 1.560 INCHES NOMINAL IN |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 0.900 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Waveguide Outside Height | 0.500 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.000 INCHES NOMINAL IN |
| Waveguide Inside Height | 0.400 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 SINGLE TUBING SEGMENT AND FLANGE |
| Waveguide Longer Offset Distance | 1.560 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 90BE18-1C PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
| 65090-595 PRIMARY | Microwave Development Company Inc Dba Microwave Development Company Inc (USA) |
| X124-770 PRIMARY | Microwave Engineering Corporation (USA) |
| Reference | Meaning |
|---|---|
| 13458675-1 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
NSN 5985-01-456-4637 is a Waveguide Assembly, manufactured by Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-456-4637 has 3 manufacturer part numbers on file: 90BE18-1C (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc), 65090-595 (Microwave Development Company Inc Dba Microwave Development Company Inc), X124-770 (Microwave Engineering Corporation).
Key specifications for 90BE18-1C: Flange Quantity: 2; Style Designator: BEND TYPE; Waveguide Offset Distance: 1.560 INCHES NOMINAL IN; Flexibility: RIGID SINGLE TUBING SEGMENT. 11 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.
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.