The Waveguide Assembly, cataloged under National Stock Number 5985-00-451-8259, 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 Northrop Grumman Systems Corporation. Government technical data includes 30 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-451-8259 |
| Primary Part Number | A71S9061-1 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.309 INCHES MINIMUM AND 0.313 INCHES MAXIMUM ALL FLANGES IN |
| Flange Quantity | 2 |
| Precious Material | SILVER |
| Voltage Standing Wave Ratio | 1.08 |
| Waveguide First Leg Length | 1.250 INCHES NOMINAL IN |
| Waveguide Second Leg Length | 1.750 INCHES NOMINAL IN |
| Style Designator | THREE BEND TYPE |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Flange Inside Diameter | 0.985 INCHES MINIMUM AND 1.015 INCHES MAXIMUM ALL FLANGES IN |
| Waveguide Inside Width | 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 20.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM ALL FLANGES IN |
| Flange Inside Width | 0.620 INCHES MINIMUM AND 0.624 INCHES MAXIMUM ALL FLANGES IN |
| Thread Direction | RIGHT-HAND ALL FLANGES ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.138 INCHES ALL FLANGES ALL CONNECTION FACILITIES IN |
| Waveguide Fourth Leg Length | 2.750 INCHES NOMINAL IN |
| Waveguide Outside Height | 0.388 INCHES MINIMUM AND 0.394 INCHES MAXIMUM IN |
| Waveguide Outside Width | 0.699 INCHES MINIMUM AND 0.705 INCHES MAXIMUM IN |
| Flange Depth | 0.360 INCHES MINIMUM AND 0.390 INCHES MINIMUM ALL FLANGES IN |
| Flange Outside Width | 1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM ALL FLANGES IN |
| Insertion Loss in Decibels | 0.10 |
| Surface Treatment | SILVER ALL TUBING SEGMENT AND FLANGE INSIDE SURFACES |
| Surface Treatment | SILVER ALL FLANGE ALL SURFACES |
| Precious Material and Location | INTERNAL TUBING SEGMENT SURFACES AND OVERALL FLANGE SURFACES SILVER |
| Waveguide Inside Height | 0.309 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Thread Class | 2B ALL FLANGES ALL CONNECTION FACILITIES |
| Thread Quantity Per Inch | 32 ALL FLANGES ALL CONNECTION FACILITIES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A71S9061-1 | Microwave Engineering Corporation (USA) |
| A71S9061-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 5985-00-451-8259 is a Waveguide Assembly, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-451-8259 has 2 manufacturer part numbers on file: A71S9061-1 (Microwave Engineering Corporation), A71S9061-1 (Northrop Grumman Systems Corporation).
Key specifications for A71S9061-1: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.309 INCHES MINIMUM AND 0.313 INCHES MAXIMUM ALL FLANGES IN; Flange Quantity: 2. 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.