The Waveguide Assembly, cataloged under National Stock Number 5985-01-030-9978, 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30 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-030-9978 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENTSEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.622 INCHES NOMINAL FIRST FLANGE0.622 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 0.753 INCHES NOMINAL SECOND FLANGE0.753 INCHES NOMINAL SECOND FLANGE IN |
| Flange Quantity | 22 |
| Voltage Standing Wave Ratio | 1.101.10 |
| Bend Angle in Deg | 90.0 ALL BENDS H-PLANE90.0 ALL BENDS H-PLANE |
| Style Designator | BEND TYPE |
| Waveguide Offset Distance | 2.680 INCHES NOMINAL2.680 INCHES NOMINAL IN |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 1.372 INCHES NOMINAL1.372 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULARINTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Connecting Hole Diameter | 0.100 INCHES NOMINAL SECOND FLANGE SINGLE CONNECTION FACILITY0.100 INCHES NOMINAL SECOND FLANGE SINGLE CONNECTION FACILITY IN |
| Flange Inside Width | 1.372 INCHES NOMINAL FIRST FLANGE1.372 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 1.503 INCHES NOMINAL SECOND FLANGE1.503 INCHES NOMINAL SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE SINGLE CONNECTION FACILITYRIGHT-HAND FIRST FLANGE SINGLE CONNECTION FACILITY |
| Nominal Thread Size | 0.190 INCHES FIRST FLANGE SINGLE CONNECTION FACILITY0.190 INCHES FIRST FLANGE SINGLE CONNECTION FACILITY IN |
| Waveguide Outside Height | 0.750 INCHES NOMINAL0.750 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.500 INCHES NOMINAL1.500 INCHES NOMINAL IN |
| Flange Depth | 0.750 INCHES NOMINAL FIRST FLANGE0.750 INCHES NOMINAL FIRST FLANGE IN |
| Flange Depth | 0.375 INCHES NOMINAL SECOND FLANGE0.375 INCHES NOMINAL SECOND FLANGE IN |
| Surface Treatment | ENAMEL ALL FLANGE OUTSIDE SURFACES |
| Surface Treatment | PLASTIC AND PAINT ALL FLANGE INSIDE SURFACES |
| Waveguide Inside Height | 0.622 INCHES NOMINAL0.622 INCHES NOMINAL IN |
| Thread Class | 2B FIRST FLANGE SINGLE CONNECTION FACILITY2B FIRST FLANGE SINGLE CONNECTION FACILITY |
| Material | COPPER ALLOY ALL FLANGE |
| Flange Connecting Facility and Quantity | 6 THREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY6 THREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 6 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY6 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY |
| Flange Outside Diameter | 3.125 INCHES NOMINAL FIRST FLANGE3.125 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Diameter | 3.125 INCHES NOMINAL SECOND FLANGE3.125 INCHES NOMINAL SECOND FLANGE IN |
| Thread Series Designator | UNF FIRST FLANGE SINGLE CONNECTION FACILITY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| SM-F-720410 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-030-9978 is a Waveguide Assembly, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
Key specifications for 5985-01-030-9978: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENTSEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.622 INCHES NOMINAL FIRST FLANGE0.622 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 0.753 INCHES NOMINAL SECOND FLANGE0.753 INCHES NOMINAL SECOND FLANGE IN; Flange Quantity: 22. 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.