The Waveguide Assembly, cataloged under National Stock Number 5985-01-498-1127, 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 28 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-498-1127 |
| Primary Part Number | 6619918 |
| 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 Inside Height | 0.712 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 0.712 INCHES NOMINAL SECOND FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.10 |
| Bend Angle in Deg | 90.0 FOURTH BEND H-PLANE |
| Bend Angle in Deg | 45.0 SECOND BEND H-PLANE |
| Bend Angle in Deg | 15.0 THIRD BEND H-PLANE |
| Bend Angle in Deg | 60.0 FIRST BEND H-PLANE |
| Style Designator | FOUR BEND TYPE |
| Flexibility | RIGID ALL TUBING SEGMENT |
| Waveguide Inside Width | 0.620 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 0.313 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Height | 1.504 INCHES NOMINAL FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.147 INCHES NOMINAL AND 0.154 INCHES MAXIMUM ALL FLANGES ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 0.622 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Width | 0.622 INCHES NOMINAL FIRST FLANGE IN |
| Waveguide Outside Height | 0.792 INCHES NOMINAL IN |
| Waveguide Outside Width | 0.702 INCHES NOMINAL IN |
| Flange Depth | 0.250 INCHES NOMINAL FIRST FLANGE IN |
| Flange Depth | 0.125 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 0.313 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.594 INCHES NOMINAL FIRST FLANGE IN |
| Insertion Loss in Decibels | 0.20 |
| Waveguide Inside Height | 0.712 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| Flange Connecting Facility and Quantity | 12 UNTHREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6619918 | Microtech Inc Dba Microtech Inc (USA) |
| 6619918 PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 6619918 | D/9 Drawing number reference only Naval Sea Systems Command |
| 6619918 | 5/9 Secondary reference Microwave Products Inc Sub of Adams-Russel Co Inc |
NSN 5985-01-498-1127 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 5985-01-498-1127 has 2 manufacturer part numbers on file: 6619918 (Microtech Inc Dba Microtech Inc), 6619918 (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
Key specifications for 6619918: Flange Inside Height: 0.712 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 0.712 INCHES NOMINAL SECOND FLANGE IN; Flange Quantity: 2; Voltage Standing Wave Ratio: 1.10. 28 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 5985-01-498-1127 has DEMIL Code D. 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.