The Waveguide Assembly, cataloged under National Stock Number 5985-01-342-4022, 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 Engineering Corporation. Government technical data includes 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-342-4022 |
| Primary Part Number | R170 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Engineering Corporation |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDE AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.318 INCHES MINIMUM AND 0.324 INCHES MAXIMUM ALL FLANGES IN |
| Flange Quantity | 2 |
| Precious Material | SILVER |
| Voltage Standing Wave Ratio | 1.25 |
| Style Designator | OFFSET BEND TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR DOUBLE RIDGED EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.360 INCHES MINIMUM AND 1.390 INCHES MAXIMUM ALL FLANGES IN |
| Flange Connecting Hole Diameter | 0.0937 INCHES MINIMUM AND 0.0939 INCHES MAXIMUM ALL FLANGES THIRD CONNECTION FACILITY IN |
| Flange Connecting Hole Diameter | 0.0960 INCHES MINIMUM AND 0.0965 INCHES MAXIMUM ALL FLANGES SECOND CONNECTION FACILITY IN |
| Waveguide Center to Center Distance | 0.800 INCHES NOMINAL IN |
| Flange Inside Width | 0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM ALL FLANGES IN |
| Thread Direction | RIGHT-HAND ALL FLANGES FIRST CONNECTION FACILITY |
| Waveguide Length | 2.500 INCHES NOMINAL IN |
| Nominal Thread Size | 0.138 INCHES ALL FLANGES FIRST CONNECTION FACILITY IN |
| Waveguide Outside Height | 0.418 INCHES MINIMUM AND 0.424 INCHES MAXIMUM IN |
| Waveguide Outside Width | 0.788 INCHES MINIMUM AND 0.794 INCHES MAXIMUM IN |
| Flange Depth | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM ALL FLANGES IN |
| Flange Outside Width | 1.360 INCHES MINIMUM AND 1.390 INCHES MAXIMUM ALL FLANGES IN |
| Insertion Loss in Decibels | 0.30 |
| Surface Treatment | SILVER SINGLE TUBING SEGMENT INSIDE SURFACES |
| Precious Material and Location | INTERNAL WAVEGUIDE SURFACE SILVER |
| Waveguide Inside Height | 0.318 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN |
| Thread Class | 2B ALL FLANGES FIRST CONNECTION FACILITY |
| Material | ALUMINUM ALLOY ALL FLANGE |
| Material | COPPER ALLOY SINGLE TUBING SEGMENT |
| 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 |
|---|---|
| R170 | Microwave Engineering Corporation (USA) |
| Reference | Meaning |
|---|---|
| 3452598-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-342-4022 is a Waveguide Assembly, manufactured by Microwave Engineering Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-342-4022 has 1 manufacturer part number on file: R170 (Microwave Engineering Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4920-01-499-9266. Verify interchangeability with system specifications before substitution.
Key specifications for R170: FSC Application Data: ANTENNAS,WAVEGUIDE AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.318 INCHES MINIMUM AND 0.324 INCHES MAXIMUM ALL FLANGES IN; Flange Quantity: 2. 29 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 5985-01-342-4022 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.