The Waveguide Assembly, cataloged under National Stock Number 5985-01-333-2897, 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 Microtech Inc Dba Microtech Inc. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-333-2897 |
| Primary Part Number | 231656 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microtech Inc Dba Microtech Inc |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.753 INCHES MINIMUM ALL FLANGES IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.12 |
| Style Designator | OFFSET BEND TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 1.368 INCHES MINIMUM AND 1.376 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 45.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Connecting Hole Diameter | 0.199 INCHES MINIMUM AND 0.203 INCHES MAXIMUM ALL FLANGES ALL CONNECTION FACILITIES IN |
| Waveguide Center to Center Distance | 2.030 INCHES MINIMUM AND 2.090 INCHES MAXIMUM IN |
| Flange Inside Width | 1.503 INCHES MINIMUM ALL FLANGES IN |
| Waveguide Length | 11.720 INCHES MINIMUM AND 11.780 INCHES MAXIMUM IN |
| Waveguide Outside Height | 0.746 INCHES MINIMUM AND 0.754 INCHES MAXIMUM IN |
| Waveguide Outside Width | 1.496 INCHES MINIMUM AND 1.504 INCHES MAXIMUM IN |
| Flange Depth | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM ALL FLANGES IN |
| Insertion Loss in Decibels | 0.10 |
| Surface Treatment | PAINT ALL FLANGE OUTSIDE SURFACES |
| Waveguide Inside Height | 0.618 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY ALL FLANGE |
| Material | COPPER ALLOY SINGLE TUBING SEGMENT |
| Material | RUBBER SILICONE SINGLE TUBING JACKET |
| Flange Connecting Facility and Quantity | 6 UNTHREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Outside Diameter | 3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM ALL FLANGES IN |
| Flange Style | COVER TYPE ALL FLANGES |
| 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 |
|---|---|
| 231656 PRIMARY | Microtech Inc Dba Microtech Inc (USA) |
| Reference | Meaning |
|---|---|
| 8811-1055-1 | 7/9 Vendor item drawing reference Drs Icas, Llc |
NSN 5985-01-333-2897 is a Waveguide Assembly, manufactured by Microtech Inc Dba Microtech Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-333-2897 has 1 manufacturer part number on file: 231656 (Microtech Inc Dba Microtech Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6550-01-450-0815, 2540-01-641-7073. Verify interchangeability with system specifications before substitution.
Key specifications for 231656: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.753 INCHES MINIMUM ALL FLANGES IN; Flange Quantity: 2. 26 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 5985-01-333-2897 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.