The Waveguide Assembly, cataloged under National Stock Number 5985-01-365-1323, 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 Frontgrade Technologies Inc.. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-365-1323 |
| Primary Part Number | 350009 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.503 INCHES MINIMUM AND 0.509 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Height | 0.503 INCHES MINIMUM AND 0.509 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Quantity | 2 |
| Style Designator | STRAIGHT TYPE |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 1.090 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR DOUBLE RIDGED EXTERNAL, RECTANGULAR |
| Operating Pressure | 30.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.376 INCHES MINIMUM AND 1.406 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Outside Height | 1.376 INCHES MINIMUM AND 1.406 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Connecting Hole Diameter | 0.145 INCHES MINIMUM AND 0.148 INCHES MAXIMUM SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 1.087 INCHES MINIMUM AND 1.093 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Width | 1.087 INCHES MINIMUM AND 1.093 INCHES MAXIMUM SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Waveguide Length | 3.000 INCHES NOMINAL IN |
| Nominal Thread Size | 0.138 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.606 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.150 INCHES NOMINAL IN |
| Flange Depth | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Depth | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Width | 1.954 INCHES MINIMUM AND 1.984 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Outside Width | 1.954 INCHES MINIMUM AND 1.984 INCHES MAXIMUM SECOND FLANGE IN |
| Surface Treatment | PAINT ALL TUBING SEGMENT AND FLANGE OUTSIDE SURFACES |
| Surface Treatment | CARBON ALL TUBING SEGMENT AND FLANGE ALL SURFACES |
| Waveguide Inside Height | 0.506 INCHES NOMINAL IN |
| Thread Class | 2B FIRST FLANGE ALL CONNECTION FACILITIES |
| Material | ALUMINUM ALLOY 6061 ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5985-01-365-1323 is a Waveguide Assembly, manufactured by Frontgrade Technologies Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-365-1323 has 2 manufacturer part numbers on file: 350009 (Frontgrade Technologies Inc.), R11-1369 (Microwave Engineering Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-372-8278. Verify interchangeability with system specifications before substitution.
Key specifications for 350009: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.503 INCHES MINIMUM AND 0.509 INCHES MAXIMUM FIRST FLANGE IN; Flange Inside Height: 0.503 INCHES MINIMUM AND 0.509 INCHES MAXIMUM SECOND FLANGE IN; Flange Quantity: 2. 29 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 5985-01-365-1323 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.