The Waveguide Assembly, cataloged under National Stock Number 5985-01-271-7256, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-271-7256 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.1386 INCHES MINIMUM AND 0.1414 INCHES MAXIMUM ALL FLANGES IN |
| Waveguide Height | 1.040 INCHES NOMINAL IN |
| Flange Quantity | 2 |
| Precious Material | RHODIUM AND SILVER |
| Voltage Standing Wave Ratio | 1.07 |
| Style Designator | DOUBLE BEND TYPE |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Flange Inside Diameter | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM ALL FLANGES IN |
| Waveguide Inside Width | 0.2785 INCHES MINIMUM AND 0.2815 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM ALL FLANGES IN |
| Waveguide Center to Center Distance | 3.050 INCHES NOMINAL IN |
| Flange Inside Width | 0.2786 INCHES MINIMUM AND 0.2814 INCHES MAXIMUM ALL FLANGES IN |
| Thread Direction | RIGHT-HAND ALL FLANGES ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.112 INCHES ALL FLANGES SINGLE CONNECTION FACILITY IN |
| Waveguide Outside Height | 0.218 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN |
| Waveguide Outside Width | 0.358 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN |
| Flange Depth | 0.195 INCHES MINIMUM AND 0.225 INCHES MAXIMUM ALL FLANGES IN |
| Flange Outside Width | 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM ALL FLANGES IN |
| Insertion Loss in Decibels | 0.20 |
| Surface Treatment | SILVER AND RHODIUM AND PRIMER AND ENAMEL ALL TUBING SEGMENT AND FLANGE OUTSIDE SURFACES |
| Waveguide Inside Height | 0.1385 INCHES MINIMUM AND 0.1415 INCHES MAXIMUM IN |
| Thread Class | 2B ALL FLANGES SINGLE CONNECTION FACILITY |
| Thread Quantity Per Inch | 40 ALL FLANGES SINGLE CONNECTION FACILITY |
| Material | COPPER ALLOY ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) ALL FLANGES SINGLE CONNECTION FACILITY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) ALL FLANGES SINGLE CONNECTION FACILITY |
| Flange Style | CHOKE TYPE ALL FLANGES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 17-19196-1 | 3/9 Design control — primary reference U.S. Government activity |
| 17-19196-1 | C/1 Advisory reference — outside the item-of-supply concept Textron Systems Corporation Dba Textron Systems Corp |
NSN 5985-01-271-7256 is a Waveguide Assembly, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
Key specifications for 5985-01-271-7256: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.1386 INCHES MINIMUM AND 0.1414 INCHES MAXIMUM ALL FLANGES IN; Waveguide Height: 1.040 INCHES NOMINAL IN. 30 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.