The Waveguide Assembly, cataloged under National Stock Number 5985-00-231-9700, 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 Bae Systems Information and Electronic Systems Integration Inc.. Government technical data includes 30 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-231-9700 |
| Primary Part Number | G128-312-001 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Bae Systems Information and Electronic Systems Integration Inc. |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SECOND TUBING SEGMENT |
| Tubing Wall Construction Style | SEAMLESS THIRD TUBING SEGMENT |
| Tubing Wall Construction Style | SEAMLESS FIRST TUBING SEGMENT |
| Tubing Wall Construction Style | CONVOLUTE FOURTH TUBING SEGMENT |
| Tubing Wall Construction Style | SEAMLESS FIFTH TUBING SEGMENT |
| Tubing Wall Construction Style | SEAMLESS SIXTH TUBING SEGMENT |
| Flange Inside Height | 0.394 INCHES MINIMUM AND 0.396 INCHES MAXIMUM ALL FLANGES IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.10 |
| Waveguide First Leg Length | 1.100 INCHES NOMINAL IN |
| Waveguide Second Leg Length | 8.250 INCHES NOMINAL IN |
| Style Designator | THREE BEND TYPE |
| Flexibility | RIGID THIRD TUBING SEGMENT |
| Flexibility | RIGID FIFTH TUBING SEGMENT |
| Flexibility | RIGID SIXTH TUBING SEGMENT |
| Flexibility | RIGID FIRST TUBING SEGMENT |
| Flexibility | RIGID SECOND TUBING SEGMENT |
| Flexibility | FLEXIBLE FOURTH TUBING SEGMENT |
| Waveguide Inside Width | 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.298 INCHES MINIMUM AND 1.328 INCHES MAXIMUM ALL FLANGES IN |
| Flange Connecting Hole Diameter | 0.144 INCHES MINIMUM AND 0.147 INCHES MAXIMUM ALL FLANGES ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 0.705 INCHES MINIMUM AND 0.707 INCHES MAXIMUM ALL FLANGES IN |
| Waveguide Fourth Leg Length | 1.860 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 | 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM ALL FLANGES IN |
| Flange Outside Width | 1.298 INCHES MINIMUM AND 1.328 INCHES MAXIMUM ALL FLANGES IN |
| Insertion Loss in Decibels | 0.20 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| G128-312-001 PRIMARY | Bae Systems Information and Electronic Systems Integration Inc. (USA) |
| Reference | Meaning |
|---|---|
| G128-312-001 | 5/9 Secondary reference Ward Leonard Ct Llc |
| G128-312-001 | 5/9 Secondary reference U.S. Government activity |
| G128-312-001 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| G128-312-001 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-00-231-9700 is a Waveguide Assembly, manufactured by Bae Systems Information and Electronic Systems Integration Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-231-9700 has 1 manufacturer part number on file: G128-312-001 (Bae Systems Information and Electronic Systems Integration Inc.).
Key specifications for G128-312-001: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SECOND TUBING SEGMENT; Tubing Wall Construction Style: SEAMLESS THIRD TUBING SEGMENT; Tubing Wall Construction Style: SEAMLESS FIRST TUBING SEGMENT. 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.
NSN 5985-00-231-9700 has DEMIL Code B. 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.