The Waveguide Assembly, cataloged under National Stock Number 5985-01-309-6857, 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30 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-309-6857 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIP. |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.867 INCHES MINIMUM AND 0.877 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Height | 1.003 INCHES MINIMUM AND 1.009 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.08 |
| Bend Angle in Deg | 6.9 SINGLE BEND E-PLANE |
| Style Designator | STRAIGHT TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 1.872 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 30.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Connecting Hole Diameter | 0.195 INCHES MINIMUM AND 0.199 INCHES MAXIMUM SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 1.867 INCHES MINIMUM AND 1.877 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Width | 2.003 INCHES MINIMUM AND 2.009 INCHES MAXIMUM SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Waveguide Length | 120.000 INCHES NOMINAL IN |
| Nominal Thread Size | 0.190 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Specification/standard Data | 81349-MIL-W-287/3 GOVERNMENT SPECIFICATION |
| Waveguide Outside Height | 1.000 INCHES NOMINAL IN |
| Waveguide Outside Width | 2.000 INCHES NOMINAL IN |
| Flange Depth | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Depth | 0.923 INCHES MINIMUM AND 0.953 INCHES MAXIMUM FIRST FLANGE IN |
| Tubing Twist Type | TWISTABLE SINGLE TUBING SEGMENT |
| Tubing Twist Angle in Deg | 14.5 SINGLE TUBING SEGMENT |
| Insertion Loss in Decibels | 0.05 |
| Waveguide Inside Height | 0.872 INCHES NOMINAL IN |
| Thread Class | 2A FIRST FLANGE ALL CONNECTION FACILITIES A |
| Material | ALUMINUM ALLOY SINGLE TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| 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 |
|---|---|
| MIL-W-287/3 | 5/9 Secondary reference U.S. Government activity |
| M287/3-20-0120 | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-287/3 | 4/1 Identification reference U.S. Government activity |
NSN 5985-01-309-6857 is a Waveguide Assembly, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
Key specifications for 5985-01-309-6857: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIP.; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.867 INCHES MINIMUM AND 0.877 INCHES MAXIMUM FIRST FLANGE IN; Flange Inside Height: 1.003 INCHES MINIMUM AND 1.009 INCHES MAXIMUM SECOND FLANGE 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.