The Waveguide Assembly, cataloged under National Stock Number 5985-01-318-8085, 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 Raytheon Company Dba Raytheon Co. Government technical data includes 30 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-318-8085 |
| Primary Part Number | 951431-81 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIP. |
| Tubing Wall Construction Style | SEAMLESS ALL TUBING SEGMENT |
| Flange Inside Height | 0.867 INCHES MINIMUM AND 0.877 INCHES MAXIMUM THIRD FLANGE IN |
| Flange Quantity | 3 |
| Precious Material | SILVER |
| Voltage Standing Wave Ratio | 1.10 |
| Waveguide Second Leg Length | 6.000 INCHES NOMINAL IN |
| Bend Angle in Deg | 90.0 THIRD BEND E-PLANE |
| Bend Angle in Deg | 90.0 SECOND BEND E-PLANE |
| Bend Angle in Deg | 180.0 FIRST BEND H-PLANE |
| Style Designator | THREE BEND TYPE |
| Flexibility | RIGID THIRD TUBING SEGMENT |
| Flexibility | FLEXIBLE SECOND TUBING SEGMENT |
| Flexibility | RIGID FIRST TUBING SEGMENT |
| Waveguide Inside Width | 1.872 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 15.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Inside Width | 1.867 INCHES MINIMUM AND 1.877 INCHES MAXIMUM THIRD FLANGE IN |
| Thread Direction | RIGHT-HAND THIRD FLANGE ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.190 INCHES THIRD FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Fourth Leg Length | 5.350 INCHES NOMINAL IN |
| Waveguide Outside Height | 1.000 INCHES NOMINAL IN |
| Waveguide Outside Width | 2.000 INCHES NOMINAL IN |
| Flange Depth | 0.923 INCHES MINIMUM AND 0.953 INCHES MAXIMUM THIRD FLANGE IN |
| Surface Treatment | ANODIZE FIRST TUBING SEGMENT ALL SURFACES |
| Surface Treatment | ANODIZE THIRD TUBING SEGMENT ALL SURFACES |
| Surface Treatment | COPPER OR SILVER SECOND TUBING SEGMENT INSIDE SURFACES |
| Precious Material and Location | INTERNAL SURFACES SILVER |
| Waveguide Inside Height | 0.872 INCHES NOMINAL IN |
| Thread Class | 2A THIRD FLANGE ALL CONNECTION FACILITIES A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5985-01-318-8085 is a Waveguide Assembly, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-318-8085 has 3 manufacturer part numbers on file: 951431-81 (Raytheon Company), 951431-81 (Raytheon Company Dba Raytheon Co), 951431-81 (Microtech Inc Dba Microtech Inc).
Key specifications for 951431-81: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIP.; Tubing Wall Construction Style: SEAMLESS ALL TUBING SEGMENT; Flange Inside Height: 0.867 INCHES MINIMUM AND 0.877 INCHES MAXIMUM THIRD FLANGE IN; Flange Quantity: 3. 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.
NSN 5985-01-318-8085 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.