The Adapter,waveguide, cataloged under National Stock Number 5985-00-405-0538, 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 Keysight Technologies Inc. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-405-0538 |
| Primary Part Number | 11518A |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Flange Quantity | 2 |
| Style Designator | WAVEGUIDE TO WAVEGUIDE |
| Flange Outside Height | 0.750 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Height | 1.297 INCHES NOMINAL FIRST FLANGE IN |
| Adapter Length | 4.031 INCHES NOMINAL IN |
| Flange Connecting Hole Diameter | 0.125 INCHES NOMINAL SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Connecting Hole Diameter | 0.141 INCHES NOMINAL FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Flange Outside Width | 0.750 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.297 INCHES NOMINAL FIRST FLANGE IN |
| Material | METAL ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| Flange Style | COVER TYPE FIRST FLANGE |
| Flange Style | COVER TYPE SECOND FLANGE |
| 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 |
|---|---|
| 11518A PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 11518A | 3/9 Design control — primary reference Keysight Technologies, Inc. |
| 11518A | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
NSN 5985-00-405-0538 is a Adapter,waveguide, manufactured by Keysight Technologies Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-405-0538 has 1 manufacturer part number on file: 11518A (Keysight Technologies Inc).
Key specifications for 11518A: Flange Quantity: 2; Style Designator: WAVEGUIDE TO WAVEGUIDE; Flange Outside Height: 0.750 INCHES NOMINAL SECOND FLANGE IN; Flange Outside Height: 1.297 INCHES NOMINAL FIRST FLANGE IN. 14 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 5985-00-405-0538 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.