The Waveguide Assembly, cataloged under National Stock Number 5985-01-406-7650, 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 The Boeing Company Div Legacy Am&m. Government technical data includes 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-406-7650 |
| Primary Part Number | LE413-0251-0029 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.493 INCHES MINIMUM AND 0.501 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.40 |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 1.118 INCHES MINIMUM AND 1.126 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 45.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Inside Width | 1.118 INCHES MINIMUM AND 1.126 INCHES MAXIMUM SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND SECOND FLANGE ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.164 INCHES SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.621 INCHES MINIMUM AND 0.629 INCHES MAXIMUM IN |
| Waveguide Outside Width | 1.246 INCHES MINIMUM AND 1.254 INCHES MAXIMUM IN |
| Flange Depth | 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Width | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM SECOND FLANGE IN |
| Insertion Loss in Decibels | 0.55 |
| Waveguide Inside Height | 0.493 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN |
| Thread Class | 2B SECOND FLANGE ALL CONNECTION FACILITIES |
| Material | ALUMINUM ALLOY SINGLE TUBING SEGMENT |
| Material | ALUMINUM ALLOY SECOND FLANGE |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SECOND FLANGE ALL CONNECTION FACILITIES |
| Flange Style | COVER TYPE SECOND FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| R31-268 | Microwave Engineering Corporation (USA) |
| LE413-0251-0029 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| LE413-0251-0029 | Microtech Inc Dba Microtech Inc (USA) |
| Reference | Meaning |
|---|---|
| LE413-0251-0029 | C/1 Advisory reference — outside the item-of-supply concept Frontgrade Technologies Inc. |
| LE413-0251-0029 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-01-406-7650 is a Waveguide Assembly, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-406-7650 has 3 manufacturer part numbers on file: R31-268 (Microwave Engineering Corporation), LE413-0251-0029 (The Boeing Company Div Legacy Am&m), LE413-0251-0029 (Microtech Inc Dba Microtech Inc).
Key specifications for LE413-0251-0029: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.493 INCHES MINIMUM AND 0.501 INCHES MAXIMUM SECOND FLANGE IN; Flange Quantity: 2; Voltage Standing Wave Ratio: 1.40. 24 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 5985-01-406-7650 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.