The Waveguide Assembly, cataloged under National Stock Number 5985-01-390-4030, 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 Microwave Engineering Corporation. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-390-4030 |
| Primary Part Number | TFT-68-2-A-6-N |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Engineering Corporation |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.503 INCHES MINIMUM AND 0.506 INCHES MAXIMUM ALL FLANGES IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.12 |
| Style Designator | STRAIGHT TYPE |
| Flexibility | FLEXIBLE 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 | 50.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM ALL FLANGES IN |
| Flange Connecting Hole Diameter | 0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM ALL FLANGES ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 1.253 INCHES MINIMUM AND 1.256 INCHES MAXIMUM ALL FLANGES IN |
| Waveguide Length | 5.880 INCHES MINIMUM AND 6.120 INCHES MAXIMUM 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 | 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM ALL FLANGES IN |
| Flange Outside Width | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM ALL FLANGES IN |
| Insertion Loss in Decibels | 0.08 |
| Waveguide Inside Height | 0.493 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY ALL FLANGE |
| Material | COPPER ALLOY SINGLE TUBING SEGMENT |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Style | COVER TYPE ALL FLANGES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| TFT-68-2-A-6-N | Microwave Engineering Corporation (USA) |
| 654VE7190-24 | Microtech Inc Dba Microtech Inc (USA) |
| Reference | Meaning |
|---|---|
| 126691-6 | 5/9 Secondary reference U.S. Government activity |
| 654VE7190-24 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-390-4030 is a Waveguide Assembly, manufactured by Microwave Engineering Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-390-4030 has 2 manufacturer part numbers on file: TFT-68-2-A-6-N (Microwave Engineering Corporation), 654VE7190-24 (Microtech Inc Dba Microtech Inc).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-543-8014. Verify interchangeability with system specifications before substitution.
Key specifications for TFT-68-2-A-6-N: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.503 INCHES MINIMUM AND 0.506 INCHES MAXIMUM ALL FLANGES IN; Flange Quantity: 2; Voltage Standing Wave Ratio: 1.12. 23 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 5985-01-390-4030 has DEMIL Code Q. 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.