The Waveguide Assembly, cataloged under National Stock Number 5985-01-390-1999, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-390-1999 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.20 |
| Waveguide First Leg Length | 2.278 INCHES MINIMUM AND 2.288 INCHES MAXIMUM IN |
| Waveguide Second Leg Length | 1.100 INCHES NOMINAL IN |
| Style Designator | THREE BEND TYPE |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Waveguide Fourth Leg Length | 1.140 INCHES NOMINAL IN |
| Insertion Loss in Decibels | 0.15 |
| Material | ALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE |
| Waveguide Third Leg Length | 2.278 INCHES MINIMUM AND 2.288 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 5096436 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-390-1999 is a Waveguide Assembly, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
Key specifications for 5985-01-390-1999: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Quantity: 2; Voltage Standing Wave Ratio: 1.20; Waveguide First Leg Length: 2.278 INCHES MINIMUM AND 2.288 INCHES MAXIMUM IN. 12 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.